<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1688-0420</journal-id>
<journal-title><![CDATA[Revista Uruguaya de Cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Urug.Cardiol.]]></abbrev-journal-title>
<issn>1688-0420</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Uruguaya de Cardiología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-04202016000100022</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ablación o drogas en la fibrilación auricular paroxística]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrizo1]]></surname>
<given-names><![CDATA[Aldo G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acosta]]></surname>
<given-names><![CDATA[Juan G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morillo1]]></surname>
<given-names><![CDATA[Carlos A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,McMaster University Hamilton Health Sciences Servicio de Arritmia y Marcapasos]]></institution>
<addr-line><![CDATA[Ontario ]]></addr-line>
<country>Canada</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Population Health Research Institute  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>128</fpage>
<lpage>137</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202016000100022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202016000100022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202016000100022&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Durante años las drogas antiarrítmicas (DAA) han constituido el tratamiento fundacional para los pacientes con fibrilación auricular paroxística (FAP) en los cuales se desea mantener el ritmo sinusal. Debido a las limitaciones en su eficacia, principalmente a largo plazo, sumado a la gran proporción de pacientes que discontinúan la terapia por efectos adversos, nuevas terapias no farmacológicas han sido desarrolladas con el fin de lograr un adecuado control del ritmo. En la última década la ablación por catéter se ha mostrado como la terapia más efectiva y posiblemente la más segura en aquellos pacientes con falla del tratamiento antiarrítmico. Estudios randomizados y metaanálisis recientemente publicados indican que la ablación podría ser considerada como primera línea de terapia en pacientes seleccionados con FAP en quienes se busca controlar el ritmo. Por lo tanto, en este artículo revisaremos la evidencia actual que avala el uso de DAA o ablación en la FAP.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[FIBRILACIÓN AURICULAR]]></kwd>
<kwd lng="es"><![CDATA[ABLACIÓN POR CATÉTER]]></kwd>
<kwd lng="es"><![CDATA[ANTIARRÍTMICOS]]></kwd>
<kwd lng="en"><![CDATA[ATRIAL FIBRILLATION]]></kwd>
<kwd lng="en"><![CDATA[CATHETER ABLATION]]></kwd>
<kwd lng="en"><![CDATA[ANTI-ARRHYTHMIA AGENTS]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <div class="Section1">      <p style="margin: 0cm 0cm 0.0001pt;"><b><span style="font-size: 10pt; font-family: Verdana; color: rgb(132, 130, 130);">ESPECIAL<o:p></o:p></span></b></p>         <p style="margin: 0cm 0cm 0.0001pt;"><b><span style="font-size: 10pt; font-family: Verdana; color: rgb(132, 130, 130);">FIBRILACI&Oacute;N    <br>    AURICULAR<o:p></o:p></span></b></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(132, 130, 130);">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"> </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(208, 36, 55);">Art&iacute;culo de revisi&oacute;n<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(208, 36, 55);">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><b style=""><span style="font-size: 14pt; font-family: Verdana; color: rgb(31, 26, 23);">Ablaci&oacute;n o drogas en la fibrilaci&oacute;n auricular parox&iacute;stica&nbsp; <o:p></o:p></span></b></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: black;">Dres. Aldo G. Carrizo<sup><a name="-a"></a><a href="#a">1</a></sup>, Juan G. Acosta<a href="#a"><sup>1</sup></a>, Carlos A. Morillo<sup><a href="#a">1</a>,<a name="-b"></a><a href="#b">2</a>&nbsp;</sup> <o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"><a name="a"></a><a href="#-a">1</a>. Servicio de Arritmia y Marcapasos, Hamilton Health Sciences, McMaster University, Ontario, Canada.    <br>    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="b"></a><a href="#-b">2</a>. Population Health Research Institute.    <br>    Correspondencia: Dr. Aldo Carrizo, <st1:street w:st="on"><st1:address w:st="on">237   Barton St E</st1:address></st1:street>, 4W Floor, <st1:place w:st="on"><st1:city w:st="on">Hamilton</st1:city>, <st1:state w:st="on">Ontario</st1:state>, <st1:country-region w:st="on">Canada</st1:country-region></st1:place>. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">L8L 2X2<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Correo electr&oacute;nico: <a href="mailto:carrizo@HHSC.CA">carrizo@HHSC.CA</a>&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Resumen&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Durante a&ntilde;os las drogas antiarr&iacute;tmicas (DAA) han constituido el tratamiento fundacional para los pacientes con fibrilaci&oacute;n auricular parox&iacute;stica (FAP) en los cuales se desea mantener el ritmo sinusal. Debido a las limitaciones en su eficacia, principalmente a largo plazo, sumado a la gran proporci&oacute;n de pacientes que discontin&uacute;an la terapia por efectos adversos, nuevas terapias no farmacol&oacute;gicas han sido desarrolladas con el fin de lograr un adecuado control del ritmo. En la &uacute;ltima d&eacute;cada la ablaci&oacute;n por cat&eacute;ter se ha mostrado como la terapia m&aacute;s efectiva y posiblemente la m&aacute;s segura en aquellos pacientes con falla del tratamiento antiarr&iacute;tmico. Estudios randomizados y metaan&aacute;lisis recientemente publicados indican que la ablaci&oacute;n podr&iacute;a ser considerada como primera l&iacute;nea de terapia en pacientes seleccionados con FAP en quienes se busca controlar el ritmo. Por lo tanto, en este art&iacute;culo revisaremos la evidencia actual que avala el uso de DAA o ablaci&oacute;n en la FAP.    <br>    &nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Palabras clave:</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">    ]]></body>
<body><![CDATA[<br>    &nbsp;&nbsp;&nbsp;&nbsp;FIBRILACI&Oacute;N AURICULAR    <br>    &nbsp;&nbsp;&nbsp;&nbsp;ABLACI&Oacute;N POR CAT&Eacute;TER    <br>    &nbsp;&nbsp;&nbsp;&nbsp;ANTIARR&Iacute;TMICOS&nbsp; <o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">Key words:</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">    <br>    &nbsp;&nbsp;&nbsp;&nbsp;ATRIAL FIBRILLATION    <br>    &nbsp;&nbsp;&nbsp;&nbsp;CATHETER ABLATION     <br>    &nbsp;&nbsp;&nbsp;&nbsp;ANTI-ARRHYTHMIA AGENTS&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Introducci&oacute;n&nbsp;<o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"><span style="">&nbsp;</span></span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La fibrilaci&oacute;n auricular (FA) es la arritmia card&iacute;aca m&aacute;s prevalente en la poblaci&oacute;n. Datos epidemiol&oacute;gicos demuestran que la incidencia y prevalencia de la FA est&aacute; en aumento debido, en parte, al envejecimiento poblacional, asoci&aacute;ndose as&iacute; a una considerable morbilidad e incremento en la utilizaci&oacute;n de los recursos y por ende incrementando los costos de salud<sup><a name="-1"></a><a name="-2"></a>(<a href="#1">1</a>,<a href="#2">2</a>)</sup>. Por lo tanto, una estrategia de tratamiento adecuada es altamente deseada.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>     <ol>        <li><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Varios estudios randomizados realizados a principio de la d&eacute;cada del 2000 no demostraron beneficios significativos con la estrategia &ldquo;control del ritmo&rdquo; comparada con &ldquo;control de la frecuencia&rdquo;<sup><a name="-3"></a><a name="-4"></a><a name="-5"></a><a name="-6"></a><a name="-7"></a><a name="-8"></a><a name="-9"></a>(<a href="#3">3-9</a>)</sup>. El primer objetivo en el tratamiento de la FA se centra en la prevenci&oacute;n de los eventos tromboemb&oacute;licos a trav&eacute;s de la anticoagulaci&oacute;n oral seg&uacute;n los factores de riesgo de cada paciente. En un segundo plano, pero m&aacute;s relevante para el paciente en el d&iacute;a a d&iacute;a, los esfuerzos se concentran en la reducci&oacute;n de s&iacute;ntomas, mejor&iacute;a de la calidad de vida y reducci&oacute;n de las hospitalizaciones mediante un adecuado control de la frecuencia ventricular y el control del ritmo<sup><a name="-10"></a>(<a href="#10">10</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></li>      </ol>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La terapia con DAA para mantener el ritmo sinusal ha constituido el tratamiento fundacional de la FAP. Sin embargo, solo ha demostrado mantener exitosamente el ritmo sinusal en la mitad de los pacientes luego de un a&ntilde;o<sup>(<a href="#7">7</a>)</sup>. Por lo tanto, la falta de eficacia a largo plazo sumado a la relativa alta proporci&oacute;n de pacientes que discontin&uacute;an la terapia por reacciones adversas han favorecido el desarrollo de estrategias no farmacol&oacute;gicas para lograr el control del ritmo.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La ablaci&oacute;n por radiofrecuencia con cat&eacute;ter (AC) es actualmente reconocida como una alternativa v&aacute;lida en el tratamiento de la FA. Desde su introducci&oacute;n, hace ya m&aacute;s de 15 a&ntilde;os<sup><a name="-11"></a>(<a href="#11">11</a>)</sup>, varios estudios han valorado su eficacia en el control del ritmo.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">  Si bien la AC ha demostrado resultados favorables en la reducci&oacute;n de los s&iacute;ntomas y mejor&iacute;a en la calidad de vida, no hay estudios que hayan evaluado sistem&aacute;ticamente su efecto en la mortalidad y el accidente cerebrovascular (ACV). A su vez, las complicaciones relacionadas con la ablaci&oacute;n, los costos y la poblaci&oacute;n incluida en los ensayos cl&iacute;nicos son factores que deben tenerse en cuenta al momento de evaluar los riesgos y beneficios del procedimiento.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">A pesar de lo anterior, varias gu&iacute;as cl&iacute;nicas recomiendan la AC como estrategia en aquellos pacientes con FAP sintom&aacute;tica en donde la terapia farmacol&oacute;gica con una o m&aacute;s DAA ha fallado en el control del ritmo (clase 1, nivel de evidencia A)<sup>(<a href="#10">10</a>)</sup>. Mas a&uacute;n, la reciente publicaci&oacute;n de estudios randomizados (MANTRA-PAF<sup><a name="-12"></a>(<a href="#12">12</a>) </sup>y RAAFT-2<a name="-13"></a><sup>(<a href="#13">13</a>)</sup>) han llevado el debate a un nuevo nivel: &iquest;Debe la ablaci&oacute;n por cat&eacute;ter ser indicada como tratamiento de primera l&iacute;nea?&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">En la actualidad, la AC de los pacientes con FAP se ha convertido en una pr&aacute;ctica habitual en diferentes centros alrededor del mundo, por lo tanto creemos relevante revisar sus ventajas y desventajas as&iacute; como el papel actual de las DAA. Esta revisi&oacute;n se focalizar&aacute; en el uso de DAA y de la AC para el control del ritmo en pacientes con FAP. Si bien existen otras modalidades terap&eacute;uticas, como la quir&uacute;rgica, estas no ser&aacute;n abordadas en el presente art&iacute;culo. Asimismo, tampoco se abordar&aacute; la prevenci&oacute;n tromboemb&oacute;lica que, con el reciente advenimiento de nuevos anticoagulantes orales y el uso de dispositivos de oclusi&oacute;n para la orejuela, requiere una revisi&oacute;n por separado.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Drogas antiarr&iacute;tmicas&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"><span style="">&nbsp;</span></span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Las DAA han mostrado una eficacia limitada para el mantenimiento del ritmo sinusal en pacientes con FAP. Los f&aacute;rmacos actualmente indicados para el tratamiento de la FAP incluyen amiodarona, sotalol, dofetilide, dronedarone y f&aacute;rmacos del grupo IC (propafenona, flecainida)<sup>(<a href="#10">10</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La amiodarona es el f&aacute;rmaco m&aacute;s efectivo con tasas de mantenimiento del ritmo sinusal en torno a 60%-65%<sup><a name="-14"></a>(<a href="#14">14</a>)</sup>. En el estudio CTAF<sup><a name="-15"></a>(<a href="#15">15</a>)</sup>, el 63% de los pacientes tratados con propafenona y sotalol presentaron recurrencias de FA a 16 meses frente a 35% de los tratados con amiodarona. A pesar de presentar mayor efectividad, el grupo tratado con amiodarona tuvo una tasa de abandono del tratamiento por efectos secundarios ligeramente superior al grupo tratado con sotalol o propafenona (18% vs 11%). Dado su perfil de seguridad actualmente se recomienda reservar su uso como f&aacute;rmaco de segunda l&iacute;nea en caso de fracaso de otros antiarr&iacute;tmicos, o como primera elecci&oacute;n en pacientes con disfunci&oacute;n ventricular o enfermedad coronaria<sup>(<a href="#10">10</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">En el estudio AFFIRM<sup><a name="-16"></a>(<a href="#16">16</a>)</sup>, la efectividad de los DAA de clase I para el mantenimiento de ritmo sinusal fue de 23% frente a 34% de sotalol, y 60% en los tratados con amiodarona. Las DAA clase I incluyeron a pacientes tratados con procainamida, disopiramida, moricizina, propafenona y flecainida. El estudio CAST<sup><a name="-17"></a>(<a href="#17">17</a>)</sup>, que incluy&oacute; a pacientes posinfarto y cuyo objetivo era la reducci&oacute;n de extras&iacute;stoles ventriculares, despert&oacute; dudas respecto a la seguridad de los f&aacute;rmacos IC debido a un incremento en la mortalidad; sin embargo, con el tiempo se ha probado su seguridad en ausencia de disfunci&oacute;n ventricular o cardiopat&iacute;a isqu&eacute;mica<sup><a name="-18"></a>(<a href="#18">18</a>)</sup>. En estudios frente a placebo se ha reportado una eficacia para el mantenimiento del ritmo sinusal a nueve meses de 65% para DAA de clase IC<a name="-19"></a><sup>(<a href="#19">19</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">En los estudios PAFAC<sup><a name="-20"></a>(<a href="#20">20</a>)</sup> y SAFE-T<sup><a name="-21"></a>(<a href="#21">21</a>)</sup>, entre 25% y 33% de los pacientes tratados con sotalol permanec&iacute;an libres de recurrencias durante el seguimiento, con un potencial efecto pro arr&iacute;tmico dosis dependiente que se relaciona con la prolongaci&oacute;n del QT y desarrollo de taquicardias ventriculares polim&oacute;rficas.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">El dofetilide ha probado ser tan efectivo como el sotalol y la flecainida para el mantenimiento del ritmo sinusal en FAP, siendo relativamente seguro en pacientes con disfunci&oacute;n ventricular o cardiopat&iacute;a isqu&eacute;mica<sup><a name="-22"></a>(<a href="#22">22</a>)</sup>. Una de sus principales limitaciones es que precisa de monitorizaci&oacute;n durante el inicio del tratamiento debido al riesgo de prolongaci&oacute;n del QT<sup><a name="-23"></a>(<a href="#23">23</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La dronedarona tiene un perfil de seguridad favorable en pacientes con FAP sin disfunci&oacute;n ventricular (DAFNE)<a name="-24"></a><sup>(<a href="#24">24</a>)</sup>. En el estudio DYONISIOS<sup><a name="-25"></a>(<a href="#25">25</a>)</sup>, la dronedarona fue menos efectiva que la amiodarona para el mantenimiento del ritmo sinusal en pacientes con FAP sin cardiopat&iacute;a de base (58% vs 46% libres de FA a seis meses), aunque con una menor tasa de efectos adversos. En el estudio ANDROMEDA<sup><a name="-26"></a>(<a href="#26">26</a>)</sup> se evidenci&oacute; un aumento de la mortalidad en pacientes con disfunci&oacute;n ventricular tratados con dronedarona debido a un empeoramiento de su insuficiencia card&iacute;aca. Asimismo, no se recomienda su utilizaci&oacute;n en pacientes con FA permanente debido al aumento en la mortalidad evidenciado en el estudio PALLAS<sup><a name="-27"></a>(<a href="#27">27</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>           <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Finalmente, la tasa global de mantenimiento del ritmo sinusal en estudios que comparan estrategias de control del ritmo contra control de frecuencia, y que incluyen diferentes clases de DAA, es de alrededor de 56% a un a&ntilde;o (PIAF)<sup>(<a href="#4">4</a>)</sup>, 39% a 2,3 a&ntilde;os (RACE)<sup>(<a href="#6">6</a>)</sup> y 62% a cinco a&ntilde;os (AFFIRM)<sup>(<a href="#3">3</a>)</sup>.&nbsp; <o:p></o:p></span><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">  <multicol gutter="18" cols="2"></multicol>  Ablaci&oacute;n por cat&eacute;ter&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Los desalentadores resultados con las DAA impulsaron la creaci&oacute;n de estrategias no farmacol&oacute;gicas para mantener el ritmo sinusal. Es as&iacute; que la ablaci&oacute;n de la FA ha evolucionado r&aacute;pidamente en los &uacute;ltimos a&ntilde;os. A partir del trabajo publicado por Ha&iuml;ssaguerre en 1998, el inter&eacute;s se centr&oacute; en la ablaci&oacute;n de la actividad ect&oacute;pica originada en las venas pulmonares (VP) con resultados prometedores<sup>(<a href="#11">11</a>)</sup>. Actualmente la ablaci&oacute;n de la FA tiene como principio fundamental el aislamiento el&eacute;ctrico de las VP (<a href="#fig_1">figura 1</a>). En estudios recientes la ablaci&oacute;n muestra una tasa de &eacute;xito de hasta el 80% para el control de la FAP a un a&ntilde;o de seguimiento, siendo a largo plazo de 54% tras el primer procedimiento y de 80% tras dos o m&aacute;s ablaciones (<a href="#tab_1">tabla 1</a>)<sup><a name="-28"></a><a name="-29"></a><a name="-30"></a>(<a href="#28">28-30</a>)</sup>. La tasa de complicaciones relacionadas con el procedimiento es de 6%, incluyendo un riesgo de muerte de 1/1.000-2.000 casos, riesgo de taponamiento de 1,2%, 1% de ictus y menos de 2% de estenosis de VP. La incidencia de perforaci&oacute;n esof&aacute;gica, una de las complicaciones m&aacute;s temidas de la ablaci&oacute;n de la FA, se estima en 0,01%<sup><a name="-31"></a>(<a href="#31">31</a>)</sup>.&nbsp;    <br>    </span><span style="font-size: 10pt; font-family: Verdana;">&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><a name="fig_1"></a><img style="width: 279px; height: 285px;" alt="" src="/img/revistas/ruc/v31n1/1a22f1.JPG">&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"></span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"><a name="tab_1"></a><img style="width: 555px; height: 297px;" alt="" src="/img/revistas/ruc/v31n1/1a22t1.JPG"></span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">&nbsp;     <br>      <br>  </span><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Ablaci&oacute;n contra drogas&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span>      <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">No es una tarea f&aacute;cil comparar los diferentes estudios que evaluaron directamente la ablaci&oacute;n con las DAA, ya que hasta hace poco no exist&iacute;a una t&eacute;cnica estandarizada para la ablaci&oacute;n (aislamiento de VP, potenciales fragmentados, ablaci&oacute;n linear en techo auricular o a nivel mitral, &ldquo;per&iacute;odo de blanqueo&rdquo;, etc&eacute;tera). Ni tampoco se hab&iacute;a estandarizado la manera en la cual se reportan los eventos. En 2012, el Consenso de Expertos de HRS/EHRA/ECAS (Heart Rhythm Society/ European Heart Rhythm Association/European Cardiac Arrhythmia Society) estandariz&oacute; la pr&aacute;ctica. Este documento recomienda el aislamiento el&eacute;ctrico de las VP como estrategia fundamental, y define el &eacute;xito del procedimiento como la ausencia de FA, taquicardia auricular o aleteo auricular sintom&aacute;tico o asintom&aacute;tico de duraci&oacute;n &sup3; 30 segundos a 12 meses de seguimiento posablaci&oacute;n<sup><a name="-32"></a>(<a href="#32">32</a>)</sup>.<sup> </sup>Tambi&eacute;n se recomienda un &ldquo;per&iacute;odo de blanqueo&rdquo; de tres meses posablaci&oacute;n, en donde cualquier recurrencia arr&iacute;tmica es esperada y no se considera falla del procedimiento (per&iacute;odo de inflamaci&oacute;n mio-peric&aacute;rdica transitoria). Por otro lado, el uso de DAA tambi&eacute;n var&iacute;a entre los estudios. Se debe estar consciente de estas limitaciones al analizar los resultados reportados.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">  <multicol gutter="18" cols="2"></multicol>  A pesar de las limitaciones anteriores, siete estudios randomizados comparando AC y DAA en pacientes con FA predominantemente parox&iacute;stica y en los cuales al menos un f&aacute;rmaco en dosis terap&eacute;uticas ha fallado, confirman la eficacia de la ablaci&oacute;n manteniendo el ritmo sinusal (<a href="/img/revistas/ruc/v31n1/1a22t2.JPG">tabla 2</a>)<sup>(<a href="#33">33-39</a>)</sup>. En tres de estos estudios se incluy&oacute; tambi&eacute;n a pacientes con FA persistente<sup><a name="-33"></a><a name="-34"></a><a name="-37"></a>(<a href="#33">33</a>,<a href="#34">34</a>,<a href="#37">37</a>)</sup>, y en el recientemente publicado STOP- AF se utiliz&oacute; la crioablaci&oacute;n como fuente de energ&iacute;a<sup>(<a href="#39">39</a>)</sup>. Tomando aquellos estudios que solo incluyeron pacientes con FAP, la tasa de pacientes libres de FA con ablaci&oacute;n est&aacute; entre 66% y 89%, mientras que en el grupo con DAA se ubica entre 7% y 43% a los 12 meses de seguimiento (<a href="#graf_1">figura 2</a>)<sup><a name="-35"></a><a name="-36"></a><a name="-38"></a><a name="-39"></a><a name="-40"></a>(<a href="#35">35</a>,<a href="#36">36</a>,<a href="#38">38-40</a>)</sup>. <o:p></o:p></span></p>           ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">&nbsp; <o:p></o:p></span></p>           <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p><a name="graf_1"></a><img style="width: 385px; height: 305px;" alt="" src="/img/revistas/ruc/v31n1/1a22g1.JPG">&nbsp;</o:p>&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Un reciente metaan&aacute;lisis de estudios randomizados confirman la superioridad de la ablaci&oacute;n en pacientes con FAP, con un incremento del riesgo relativo de recurrencia de FA de 2,26 (IC 95%, 1,74-2,94) en pacientes tratados con DAA<sup><a name="-41"></a>(<a href="#41">41</a>)</sup>. No solo la ablaci&oacute;n ha demostrado ser superior manteniendo el ritmo sinusal, sino tambi&eacute;n reduciendo los s&iacute;ntomas y aparentemente mejorando la calidad de vida<sup>(<a href="#12">12</a>,<a href="#39">39</a>,<a href="#40">40</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Ablaci&oacute;n como primera opci&oacute;n terap&eacute;utica<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Movilizados por los resultados alentadores previamente descritos y tambi&eacute;n basados en la idea fisiopatol&oacute;gica de brindar la mejor opci&oacute;n terap&eacute;utica de manera temprana con el objetivo de modificar los eventos a largo plazo y la progresi&oacute;n de la FA, tres estudios randomizados han sido publicados<sup>(<a href="#12">12</a>,<a href="#13">13</a>,<a href="#40">40</a>)</sup>. Estos han tratado de responder a la siguiente pregunta: &iquest;Es la ablaci&oacute;n por cat&eacute;ter superior a las DAA en pacientes con FAP, v&iacute;rgenes de tratamiento antiarr&iacute;tmico? En otras palabras, &iquest;deber&iacute;a ser la ablaci&oacute;n la primera opci&oacute;n terap&eacute;utica en pacientes con FAP?&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">En total, 491 pacientes, predominantemente j&oacute;venes, de sexo masculino, con m&iacute;nima o nula enfermedad estructural y escasas comorbilidades, fueron enrolados en estos estudios. El estudio RAAFT<sup>(<a href="#40">40</a>)</sup> fue el primero en documentar la superioridad de la AC como primera l&iacute;nea de tratamiento. Este estudio peque&ntilde;o de 70 pacientes report&oacute; una mayor tasa de pacientes libres de FA en el grupo sometido a ablaci&oacute;n (87% vs 37%, RRR 80%; p&lt;0,01) a 12 meses de seguimiento. Posteriormente, MANTRA-PAF<sup>(<a href="#12">12</a>)</sup>, con 294 pacientes, fue un estudio negativo al no encontrar diferencias entre AC y DAA con respecto al punto final primario: carga acumulada de FA. Sin embargo, report&oacute; un mayor porcentaje de pacientes libres de FA en el grupo ablaci&oacute;n (85% vs 71%, RRR 20%; p=0,004) a dos a&ntilde;os de seguimiento. En el RAAFT-2<sup>(<a href="#13">13</a>)</sup>, con un total de 127 pacientes y tambi&eacute;n a dos a&ntilde;os de seguimiento, un mayor porcentaje de pacientes se encontraban libres de taquiarritmias auriculares (fibrilaci&oacute;n/aleteo/taquicardia auricular) en el grupo sometido a ablaci&oacute;n (45% vs 28%, RRR 40%; p=0,02). Es de destacar las diferencias en la tasa de recurrencias entre estos dos &uacute;ltimos estudios. Esto se relaciona con la rigurosidad con la que los eventos fueron monitorizados, habiendo sido m&aacute;s estricto el estudio RAAFT-2.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Luego de la publicaci&oacute;n del ensayo cl&iacute;nico RAAFT-2, tres metaan&aacute;lisis reconfirman la superioridad de la ablaci&oacute;n como primera l&iacute;nea terap&eacute;utica en esta poblaci&oacute;n<sup>(<a href="#42">42-44</a>)</sup>.<sup> </sup>Khan y colaboradores<sup><a name="-42"></a>(<a href="#42">42</a>)</sup> reportaron una RRR 48% (RR, 0,52; IC95%, 0,30-0,91; p=0,02) en la recurrencia de taquicardias auriculares en pacientes sometidos a ablaci&oacute;n. M&aacute;s recientemente, Hakalahti y colaboradores<sup><a name="-43"></a>(<a href="#43">43</a>)</sup> reportaron resultados similares, obteniendo una menor recurrencia de FA en el grupo ablaci&oacute;n RRR 30% (RR 0,70; IC95%, 0,51-0,96; p=0,03). Como el estudio RAAFT-1 presenta riesgo de sesgos debido a que la adjudicaci&oacute;n de eventos no fue realizada de forma ciega, un suban&aacute;lisis excluyendo este estudio muestra que el grupo ablaci&oacute;n contin&uacute;a asoci&aacute;ndose a una mayor tasa libre de recurrencias (RR 0,70, IC95%, 0,51-0,96; p=0,03). Por &uacute;ltimo, Santangeli y colaboradores<sup><a name="-44"></a>(<a href="#44">44</a>)</sup> incluyeron en su metaan&aacute;lisis tanto estudios randomizados como observacionales y reportaron una tasa libre de FA con la ablaci&oacute;n de 67% comparada con 48% en el grupo DAA (OR 0,36, IC95%, 0,24-0,54; p &lt; 0,001).&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">  <multicol gutter="18" cols="2"></multicol>  Apoyados en los resultados expuestos, la Gu&iacute;a Cl&iacute;nica sobre FA 2014, ACC/AHA/HRS, sostiene: &ldquo;En pacientes con FAP sintom&aacute;ticos es razonable elegir inicialmente la ablaci&oacute;n por cat&eacute;ter por sobre las drogas antiarr&iacute;tmicas como estrategia para el control del ritmo, luego de haber balanceado la seguridad y eficacia de ambas terapias (clase IIa, nivel de evidencia B)<sup>(<a href="#10">10</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Complicaciones&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">El riesgo de la ablaci&oacute;n debe ser comparado con los riesgos derivados de una terapia farmacol&oacute;gica mantenida a largo tiempo.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Los estudios randomizados han reportado en general una tasa de complicaciones menor pero de mayor seriedad con respecto al tratamiento farmacol&oacute;gico. Sin embargo, esto podr&iacute;a no reflejar la experiencia de la ablaci&oacute;n en el &ldquo;mundo real&rdquo;, fuera de centros altamente experimentados. En este sentido, un registro internacional ha reportado una tasa de complicaciones mayores de 6% (taponamiento card&iacute;aco, ACV, estenosis pulmonar, f&iacute;stula atrio- esof&aacute;gica o muerte) con la ablaci&oacute;n<sup><a name="-45"></a>(<a href="#45">45</a>)</sup>. Recientemente se public&oacute; una actualizaci&oacute;n de dicho registro. En comparaci&oacute;n con lo publicado en 2005, la nueva encuesta pone de manifiesto que la ablaci&oacute;n se est&aacute; realizando en pacientes m&aacute;s enfermos (mayor edad, FA persistente y con m&aacute;s comorbilidades), y aun as&iacute; reporta una tasa de complicaciones m&aacute;s baja (4,5%)<sup><a name="-46"></a>(<a href="#46">46</a>)</sup>.<sup> </sup>Esta mejor&iacute;a en la seguridad tambi&eacute;n ha sido documentada en otros estudios<sup><a name="-47"></a>(<a href="#47">47</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Las complicaciones del procedimiento est&aacute;n muy ligadas a la experiencia del operador y del centro. Un registro nacional de Estados Unidos en centros de alto y bajo volumen report&oacute; las complicaciones intrahospitalarias de m&aacute;s de 90.000 ablaciones de FA realizadas entre los a&ntilde;os 2000 y 2010, y muestra c&oacute;mo las tasas de complicaciones se ve&iacute;an significativamente afectadas por la experiencia del operador y el volumen del centro donde se realiza la ablaci&oacute;n<sup><a name="-48"></a>(<a href="#48">48</a>)</sup>.<sup> </sup>Aquellos centros con menos de 50 ablaciones/a&ntilde;o tienen una tasa de complicaciones de 7%, mayor que aquellos con mayor n&uacute;mero de ablaciones/a&ntilde;o (4%). En el mismo sentido, aquellos operadores que realizaban menos de 25 ablaciones/a&ntilde;o presentaban mayor tasa de complicaciones (7%) en comparaci&oacute;n con los que realizaban mayor n&uacute;mero de ablaciones (2%)&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Ablaci&oacute;n de fibrilaci&oacute;n auricular, interrogantes a responder&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"><span style="">&nbsp;</span></span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">A diferencia del Wolff-Parkinson-White, en donde la ablaci&oacute;n es curativa, la FA no es una enfermedad cong&eacute;nita provocada por una anormalidad anat&oacute;mica con mecanismos electrofisiol&oacute;gicos &uacute;nicos y bien entendidos. En la mayor&iacute;a de los casos su desarrollo est&aacute; asociado a diversos procesos, anat&oacute;micos y funcionales, que promueven un estado pro fibrilatorio en la aur&iacute;cula izquierda<sup><a name="-49"></a>(<a href="#49">49</a>)</sup>. Por lo tanto, resulta simplista pensar que en una enfermedad tan compleja, un procedimiento limitado a las aur&iacute;culas pueda cambiar a largo tiempo el curso de esta enfermedad.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">La ablaci&oacute;n de la FA no es un tratamiento curativo, pero s&iacute; una de las herramientas a considerar dentro de un tratamiento multidisciplinario (control de la obesidad, hipertensi&oacute;n arterial, apnea del sue&ntilde;o, alcoholismo, etc&eacute;tera) en una enfermedad multifactorial. Siguiendo esta l&iacute;nea, la ablaci&oacute;n no ha demostrado reducir el riesgo de ACV ni la mortalidad. Existen algunos reportes de cohorte que sugieren una reducci&oacute;n en el riesgo tromboemb&oacute;lico en los pacientes sometidos a ablaci&oacute;n. Sin embargo, estos estudios no son randomizados y presentan severas limitaciones<sup><a name="-50"></a><a name="-51"></a>(<a href="#50">50</a>,<a href="#51">51</a>)</sup>. Es as&iacute; que el tratamiento anticoagulante luego de la ablaci&oacute;n debe ser guiado por el riesgo del paciente (CHA<sub>2</sub>DS<sub>2</sub>-Vasc score) y no por la ausencia de FA en el seguimiento o el &eacute;xito agudo del procedimiento. En la actualidad se est&aacute;n llevando a cabo tres estudios, CABANA (Clinicaltrials. gov: NCT00911508), CASTLE-AF (Clinicaltrials.gov: NCT0064 3188), y el EAST (Clinicaltrials.gov: NCT01288352) con el objetivo de evaluar el impacto de la ablaci&oacute;n en el ACV y la sobrevida.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Facilitando el camino: nuevas tecnolog&iacute;as&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Constantemente nuevas tecnolog&iacute;as se van desarrollando en el campo de la electrofisiolog&iacute;a con el objetivo de mejorar la seguridad y eficacia de los procedimientos. En el caso de la ablaci&oacute;n de la FAP, donde el objetivo es el aislamiento de las VP, sin la realizaci&oacute;n de l&iacute;neas de ablaci&oacute;n adicionales, nuevos cat&eacute;teres de ablaci&oacute;n circulares <span style="">(single shot)</span> se encuentran disponibles. Estos han demostrado reducir el tiempo de procedimiento y de fluoroscop&iacute;a manteniendo la misma eficacia y seguridad que la ablaci&oacute;n convencional &ldquo;punto por punto&rdquo;. El Pulmonary Vein Ablation Catheter (PVAC, Medtronic, Inc) es un cat&eacute;ter decapolar que al asentarse alrededor de las venas registra la actividad el&eacute;ctrica permitiendo simult&aacute;neamente liberar radiofrecuencia de forma ciclada bipolar y monopolar, generando lesiones circunferenciales alrededor del ostium (<a href="#fig_2">figura 3</a>)<sup><a name="-52"></a>(<a href="#48">48</a>,<a href="#52">52</a>)</sup>. Siguiendo el mismo concepto, pero usando un sistema de irrigaci&oacute;n con la idea de evitar la formaci&oacute;n de co&aacute;gulos en la interface cat&eacute;ter-tejido, el nMARQ (Biosense Webster) es otro cat&eacute;ter multielectrodo circular disponible<sup><a name="-53"></a>(<a href="#49">49</a>,<a href="#53">53</a>)</sup>.&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><a name="fig_2"></a><img style="width: 276px; height: 353px;" alt="" src="/img/revistas/ruc/v31n1/1a22f2.JPG">&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">  Una fuente de energ&iacute;a alternativa es la crioablaci&oacute;n. A trav&eacute;s de un cat&eacute;ter-bal&oacute;n (Medtronic, Inc), que se asienta sobre el ostium de las VP, se logra aislar las venas mediante la congelaci&oacute;n del tejido por debajo de -80 &deg;C<sup>(<a href="#36">36</a>,<a href="#39">39</a>)</sup>. El estudio AF-COR no encontr&oacute; diferencias en t&eacute;rminos de eficacia (tasa libre de FA a 12 meses: 46% vs 34%, p=0,2) entre PVAC y crioablaci&oacute;n<sup><a name="-54"></a>(<a href="#50">50</a>,<a href="#54">54</a>)</sup>. Un nuevo cat&eacute;ter-bal&oacute;n de ablaci&oacute;n est&aacute; siendo evaluado (CardioFocus, Inc). Este tiene la particularidad de utilizar energ&iacute;a l&aacute;ser y adem&aacute;s permite, mediante endoscop&iacute;a, la directa visualizaci&oacute;n de las VP asegurando un contacto adecuado con el tejido<sup><a name="-55"></a>(<a href="#51">51</a>,<a href="#55">55</a>)</sup>.&nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Conclusiones&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">En pacientes con FAP, la evidencia disponible demuestra la superioridad de la AC comparado con el tratamiento farmacol&oacute;gico en el mantenimiento del ritmo sinusal, la reducci&oacute;n de s&iacute;ntomas y la mejor&iacute;a de la calidad de vida. Esto se ve reflejado en las gu&iacute;as internacionales donde se le asigna una recomendaci&oacute;n clase I en aquellos pacientes sintom&aacute;ticos donde al menos una DAA ha fallado. Aunque las gu&iacute;as cl&iacute;nicas actuales tambi&eacute;n recomiendan realizar la ablaci&oacute;n como primera l&iacute;nea de terapia en pacientes seleccionados (clase IIa, nivel de evidencia B), esta estrategia es todav&iacute;a infrecuentemente adoptada en nuestro hospital y creemos que diversos elementos se deben tener en cuenta al considerarla (<a href="#fig_3">figura 4</a>). Esto resalta la complejidad del procedimiento y las complicaciones potenciales, que si bien son raras, pueden poner en riesgo la vida del paciente. Finalmente, el manejo de la FA demanda un abordaje multidisciplinario con el control adecuado de los factores de riesgo y la prevenci&oacute;n de eventos tromboemb&oacute;licos mediante la anticoagulaci&oacute;n oral, siendo el objetivo actual de la ablaci&oacute;n el control de los s&iacute;ntomas.&nbsp;<o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span><a name="fig_3"></a><img style="width: 308px; height: 214px;" alt="" src="/img/revistas/ruc/v31n1/1a22f3.JPG"></p>         <p class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);">Bibliograf&iacute;a&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(214, 36, 55);"> <o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana;"><o:p>&nbsp;</o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"><a name="1"></a><a href="#-1">1</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Magnani JW, Rienstra M, Lin H, Sinner MF, Lubitz SA, McManus DD, et al.</span> </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">Atrial fibrillation: current knowledge and future directions in epidemiology and genomics. Circulation. 2011;124(18): 1982-93</span><span style="font-size: 10pt;     font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">.&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="2"></a><a href="#-2">2</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Chugh SS, Havmoeller R, Narayanan K, Singh D, Rienstra M, Benjamin EJ, et al.</span> Worldwideepidemiology of atrial fibrillation: a Global Burden of Disease 2010 Study. Circulation. 2014;129(8): 837-47.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="3"></a><a href="#-3">3</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Carlsson J, Miketic S, Windeler J, Cuneo A, Haun S, Micus S, et al.</span> Randomized trial of rate-control versus rhythm-control in persistent atrial fibrillation: theStrategies of Treatment of Atrial Fibrillation (STAF) study. J Am Coll Cardiol 2003;41(10):1690-6.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="4"></a><a href="#-4">4</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Hohnloser SH, Kuck KH, Lilienthal J. </span>Rhythmorratecontrol in atrial fibrillation&mdash;PharmacologicalIntervention in Atrial Fibrillation (PIAF): a randomised trial. Lancet 2000;356(9244):1789-94. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="5"></a><a href="#-5">5</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Opolski G, Torbicki A, Kosior DA, Szulc M, Wozakowska-Kaplon B, Kolodziej P, et al.</span> Rate control vs rhythm control in patients with non valvular persistent atrial fibrillation: theresults of the Polish Howto Treat Chronic Atrial Fibrillation (HOT CAFE) Study. Chest 2004;126(2):476-86.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="6"></a><a href="#-6">6</a>.&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Van Gelder IC, Hagens VE, Bosker HA, Kingma JH, Kamp O, Kingma T, et al.</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"> </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">A comparison of rate control and rhythm control in patientswithrecurrentpersistent atrial fibrillation. N Engl J Med 2002;347(23):1834-40.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="7"></a><a href="#-7">7</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Wyse DG, Waldo <st1:state w:st="on">AL</st1:state>, DiMarco JP, Domanski MJ, <st1:city w:st="on"><st1:place w:st="on">Rosenberg</st1:place></st1:city> Y, Schron EB, et al.</span> A comparison of rate control and rhythm control in patientswith atrial fibrillation. N Engl J Med 2002;347(23): 1825-33.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="8"></a><a href="#-8">8</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Roy D, Talajic M, Nattel S, Wyse DG, Dorian P, Lee KL, Bourassa MG, et al.</span> Rhythm control versus rate control for atrial fibrillation and heartfailure. N Engl J Med 2008;358(25):2667-77.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="9"></a><a href="#-9">9</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Ogawa S, Yamashita T, Yamazaki T, Aizawa Y, Atarashi H, Inoue H, et al. </span>Optimal treatment strategy for patients with paroxysmal atrial fibrillation: J-RHYTHM Study. Circ J 2009;73(2):242-8.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="10"></a><a href="#-10">10</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC, et al.</span> 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. Circulation 2014; 130(23):2071-104.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="11"></a><a href="#-11">11</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Ha&iuml;ssaguerre M, Ja&iuml;s P, Shah DC, Takahashi A, Hocini M, Quiniou G, et al.</span> Spontaneous initiation of atrial fibrillation by ectopic beats originating in the pulmonary veins. N Engl J Med 1998; 339(10): 659-66.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="12"></a><a href="#-12">12</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Cosedis Nielsen J, Johannessen A, Raatikainen P, Hindricks G, Walfridsson H, Kongstad O, et al. </span>Radiofrequency ablation as initial therapy in paroxysmal atrial fibrillation. N Engl J Med 2012;367(17):1587&ndash;95. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="13"></a><a href="#-13">13</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Morillo CA, Verma A, Connolly SJ, Kuck KH, Nair GM, Champagne J, et al. </span>Radio frequency ablation vs antiarrhythmic drugs as first-line treatment of paroxysmal atrial fibrillation (RAAFT-2): a randomized trial. JAMA 2014;311(7):692&ndash;700. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="14"></a><a href="#-14">14</a>.&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Van Erven L, Schalij MJ.</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"> </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">Amiodarone: aneffective antiarrhythmic drug with unusual side effects. Heart 2010;96(19): 1593-600.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="15"></a><a href="#-15">15</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Roy D, Talajic M, Dorian P, Connolly S, Eisenberg MJ, Green M, et al.</span> Canadian Trial of Atrial Fibrillation Investigators. Amiodarone to prevent recurrence of atrial fibrillation. N Engl J Med 2000; 342(13): 913&ndash;20.</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="16"></a><a href="#-16">16</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">AFFIRM First Antiarrhythmic Drug Substudy Investigators.</span> Maintenance of sinus rhythm in patients with atrial fibrillation: an AFFIRM substudy of the first antiarrhythmic drug. J Am Coll Cardiol 2003;42(1):20-9.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="17"></a><a href="#-17">17</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Echt DS, Liebson PR, Mitchell LB, Peters RW, Obias-Manno D, Barker AH, et al.</span> CAST: Mortality and morbidity in patients receiving encainide, flecainide, or placebo. The Cardiac Arrhythmia Suppression Trial. N Engl J Med 1991;324(12):781-8.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="18"></a><a href="#-18">18</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Aliot E, Capucci A, Crijns HJ, Goette A, Tamargo J. </span>Twenty-five years in the making: flecainide is afe and effective for the management of atrial fibrillation. Europace 2011;13(2):161-73.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="19"></a><a href="#-19">19</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Clementy J, Dulhoste MN, Laiter C, Denjoy I, Dos Santos P.</span> Flecainide acetate in the prevention of paroxysmal atrial fibrillation: a nine-month follow-up of more than 500 patients. Am J Cardiol 1992;70(5):44A-49A.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="20"></a><a href="#-20">20</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Fetsch T, Bauer P, Engberding R, Koch HP, Lukl J, Meinertz T, et al.</span> Prevention of atrial fibrillation after cardioversion: results of the PAFAC trial. Eur Heart J 2004;25(16):1385-94.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="21"></a><a href="#-21">21</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Singh BN, Singh SN, Reda DJ, Tang XC, Lopez B, Harris CL, et al.</span> Amiodarone versus sotalolfor atrial fibrillation. N Engl J Med 2005;352(18): 1861-72.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="22"></a><a href="#-22">22</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Kober L, Bloch Thomsen PE, Moller M, Torp-Pedersen C, Carlsen J, Sand&oslash;e E, et al. </span>Effect of dofetilide in patients with recent myocardial infarction and left-ventricular dysfunction: a randomised trial. Lancet 2000;356(9247): 2052-8.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="23"></a><a href="#-23">23</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Abraham JM, Saliba WI, Vekstein C, Lawrence D, Bhargava M, Bassiouny M, et al.</span> Safety of Oral Dofetilide for Rhythm Control of Atrial Fibrillation and Atrial Flutter. Circ Arrhythm Electrophysiol 2015;8(4):772-6. Publicaci&oacute;n electr&oacute;nica 10 Jun 2015.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="24"></a><a href="#-24">24</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Touboul P, Brugada J, Capucci A, Crijns HJ, Edvardsson N, Hohnloser SH. </span>Dronedarone for prevention of atrial fibrillation: a dose-rangings tudy. Eur Heart J 2003;24(16):1481-7.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="25"></a><a href="#-25">25</a>.&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Le Heuzey JY, De Ferrari GM, Radzik D, Santini M, Zhu J, Davy JM. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">A short-term, randomized, double-blind, parallel-group study to evaluate the efficacy and safety of dronedarone versus amiodarone in patients with persistent atrial fibrillation: the DIONYSOS study. J Cardiovasc Electrophysiol 2010; 21( 6):597-605.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="26"></a><a href="#-26">26</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">KoberL, Torp-Pedersen C, McMurray JJ, G&oslash;tzsche O, L&eacute;vy S, Crijns H, et al.</span> Increased mortality after dronedarone therapy for severe heart failure. N Engl J Med 2008;358(25): 2678-87.</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="27"></a><a href="#-27">27</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Connolly SJ, Camm AJ, Halperin JL, Joyner C, Alings M, Amerena J, et al. </span>Dronedarone in high-risk permanent atrial fibrillation. N Engl J Med 2011;365(24): 2268-76.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="28"></a><a href="#-28">28</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Fiala M, Chovancik J, Nevralova R, Neuwirth R, Jiravsk&yacute; O, Nykl I, et al.</span> Pulmonary vein isolation using segmental versus electro anatomical circumferential ablation for paroxysmal atrial fibrillation: over 3-year results of a prospective randomized study. J Interv Card Electrophysiol 2008;22(1): 13-21.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="29"></a><a href="#-29">29</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Dixit S, Gerstenfeld EP, Ratcliffe SJ, Cooper JM, Russo AM, Kimmel SE, et al.</span> Single procedure efficacy of isolating all versus arrhythmogenic pulmonary veins on long-term control of atrial fibrillation: a prospective randomized study. Heart Rhythm 2008;5(2):174-81.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="30"></a><a href="#-30">30</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Ganesan AN, Shipp NJ, Brooks AG, Kuklik P, Lau DH, Lim HS, et al.</span> Long-termoutcomes of catheter ablation of atrial fibrillation: a systematicreview and meta-analysis . J Am Heart Assoc 2013;2(2): e004549.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="31"></a><a href="#-31">31</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Cappato R, Calkins H, Chen SA, Davies W, Iesaka Y, Kalman J, et al.</span> Prevalence and causes of fatal outcome in catheter ablation of atrial fibrillation. J Am Coll Cardiol 2009;53(19):1798-803.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="32"></a><a href="#-32">32</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Calkins H, Kuck KH, Cappato R, Brugada J, Camm AJ, Chen S-A, et al.</span> 2012 HRS/EHRA/ ECAS expert consensus statement on catheter and surgical ablation of atrial fibrillation: recommendations for patient selection, procedural techniques, patient management and follow-up, definitions, endpoints, and research trial design. Heart Rhythm 2012;9(4):632-96 e21.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="33"></a><a href="#-33">33</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Krittayaphong R, Raungrattanaamporn O, Bhuripanyo K, Sriratanasathavorn C, Pooranawattanakul S, Punlee K, et al. </span>A randomizedclinical trial of theefficacy of radiofrequency catheter ablation and amiodarone in the treatment of symptomatic atrial fibrillation. J Med Assoc Thai 2003;86 Suppl 1: S8-16.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="34"></a><a href="#-34">34</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Stabile G, Bertaglia E, Senatore G, De Simone A, Zoppo F, Donnici G, et al.</span> Catheter ablation treatment in patients with drug-refractory atrial fibrillation: a prospective, multi-centre, randomized, controlled study (Catheter Ablation For The Cure Of Atrial Fibrillation Study). Eur Heart J 2006;27(2): 216-21.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="35"></a><a href="#-35">35</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Pappone C, Augello G, Sala S, Gugliotta F, Vicedomini G, Gulletta S, et al.</span> A randomized trial of circumferential pulmonary vein ablation versus antiarrhythmic drug therapy in paroxysmal atrial fibrillation: the APAF Study. J Am Coll Cardiol 2006;48(11):2340-7.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="36"></a><a href="#-36">36</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Ja&iuml;s P, Cauchemez B, Macle L, Daoud E, Khairy P, Subbiah R, et al.</span> Catheter ablation versus antiarrhythmic drugs for atrial fibrillation: the A4 study. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Circulation 2008;118(24):2498-505.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"> </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);"><a name="37"></a><a href="#-37">37</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Forleo GB, Mantica M, De Luca L, Leo R, Santini L, Panigada S, et al.</span> </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">Catheter ablation of atrial fibrillation in patients with diabetes mellitus type 2: results from a randomized study comparing pulmonary vein isolation versus antiarrhythmic drug therapy. J Cardiovasc Electrophysiol 2009;20(1):22-8.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="38"></a><a href="#-38">38</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Wilber DJ, Pappone C, Neuzil P, De Paola A, Marchlinski F, Natale A, et al, Thermo Cool AFTI. </span>Comparison of antiarrhythmicdrugtherapy and radiofrequency catheter ablation in patients with paroxysmal atrial fibrillation: a randomized controlled trial. JAMA 2010;303(4):333-40.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="39"></a><a href="#-39">39</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Packer DL, Kowal RC, Wheelan KR, Irwin JM, Champagne J, Guerra PG, et al.</span> Cryoballoon ablation of pulmonary veins for paroxysmal atrial fibrillation: ?first results of the North American Arctic Front (STOP AF) pivotal trial. J Am Coll Cardiol 2013;61(16):1713-23.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="40"></a><a href="#-40">40</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Wazni OM, Marrouche NF, Martin DO, Verma A, Bhargava M, Saliba W, et al. </span>Radiofrequency ablation vs antiarrhythmic drugs as first-line treatment of symptomatic atrial fibrillation: a randomized trial. JAMA 2005;293(21):2634-40.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="41"></a><a href="#-41">41</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Parkash R, <st1:place w:st="on"><st1:city w:st="on">Tang</st1:city> <st1:state w:st="on">AS</st1:state></st1:place>, Sapp JL, Wells G.</span> Approach to the catheter ablation technique of paroxysmal and persistent atrial fibrillation: a meta-analysis of the randomized controlled trials. J Cardiovasc Electrophysiol 2011;22(7):729-38.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="42"></a><a href="#-42">42</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Khan AR, Khan S, Sheikh MA, Khuder S, Grubb B, Moukarbel GV.</span> Catheter ablation and antiarrhythmic drug therapy as first- or second-line therapy in the management of atrial fibrillation: systematic review and meta-analysis. Circ Arrhythm Electrophysiol 2014;7(5):853-60.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="43"></a><a href="#-43">43</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Hakalahti A, Biancari F, Nielsen JC, Raatikainen MJ. </span>Radiofrequency ablation vs. antiarrhythmic drug therapy as first line treatment of symptomatic atrial fibrillation: systematic review and meta-analysis. Europace. 2015;17(3):370-8.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="44"></a><a href="#-44">44</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Santangeli P, Di Biase L, Natale. </span>Ablation versus drugs: what is the best first-line therapy for paroxysmal atrial fibrillation? Antiarrhythmic drugs are outmoded and catheter ablation should be the first-line option for all patients with paroxysmal atrial fibrillation: pro. Circ Arrhythm Electrophysiol 2014;7(4):739-46. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="45"></a><a href="#-45">45</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Cappato R, Calkins H, Chen SA, Davies W, Iesaka Y, Kalman J, et al.</span> Worldwide survey on the methods, efficacy, and safety of catheter ablation for human atrial fibrillation. Circulation 2005,111(9): 1100-5.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="46"></a><a href="#-46">46</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Cappato R, Calkins H, Chen SA, Davies W, Iesaka Y, Kalman J, et al. </span>Updated world wide survey on the methods, efficacy, and safety of catheter ablation for human atrial fibrillation. Circ Arrhythm Electrophysiol 2010;3(1):32-8.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="47"></a><a href="#-47">47</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Dagres N, Hindricks G, Kottkamp H, Sommer P, Gaspar T, Bode K, et al.</span> Complications of atrial fibrillationablation in a high-volume center in 1,000 procedures: still cause forconcern?. J Cardiovasc Electrophysiol 2009;20(9):1014-9.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="48"></a><a href="#-48">48</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Deshmukh A, Patel NJ, Pant S, Shah N, Chothani A, Mehta K, et al.</span> In-hospital complications associated with catheter ablation of atrial fibrillation in the United States between 2000 and 2010: analysis of 93801 procedures. Circulation 2013;128(19): 2104&ndash;12. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="49"></a><a href="#-49">49</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Wakili R, Voigt N, Kaab S, Dobrev D, Nattel S. </span>Recentadvances in the molecular pathophysiology of atrial fibrillation. J Clin Invest 2011;121(8):2955-68.     </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         ]]></body>
<body><![CDATA[<!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="50"></a><a href="#-50">50</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Themistoclakis S, Corrado A, Marchlinski FE, Jais P, Zado E, Rossillo A, et al. </span>The risk of thromboembolism and need for oral anticoagulation after successful atrial fibrillation ablation. J Am Coll Cardiol 2010;55(8):735-43</span><span style="font-size: 10pt;     font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="51"></a><a href="#-51">51</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Saad EB, d&rsquo;Avila A, Costa IP, Aryana A, Slater C, Costa RE, et al.</span> Very low risk of thromboembolic events in patients undergoing successful catheter ablation of atrial fibrillation with a CHADS2 score ?3: a long-term outcome study. Circ Arrhythm Electrophysiol 2011;4(5):615-21. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="52"></a><a href="#-52">52</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">McCready J, Chow AW, Lowe MD, Segal OR, Ahsan S, de Bono J, et al.</span> Safety and efficacy of multipolar pulmonary vein ablation catheter vs. irrigated radiofrequency ablation for paroxismal atrial fibrillation: a randomized multicentre trial. Europace 2014;16(8):1145-53.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="53"></a><a href="#-53">53</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Shin D-I, Kirmanoglou K, Eickholt C, Schmidt J, Clasen L, Butzbach B, et al.</span> Initial results of using a novel irrigated multielectrode mapping and ablation catheter for pulmonary vein isolation. Heart Rhythm 2014;11:375-83 </span><span style="font-size: 10pt;     font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="54"></a><a href="#-54">54</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Malmborg H, L&ouml;nnerholm S, Blomstr&ouml;m P, Blomstr&ouml;m-Lundqvist C.</span> Ablation of atrial fibrillation with cryoballoon or duty- cycled radiofrequency pulmonary vein ablation catheter: a randomized controlled study comparing the clinical outcome and safety; the AF-COR study. Europace 2013; 15(11):1567-73.    </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US">&nbsp;</span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"> </span><span style="font-size: 10pt; font-family: Verdana;" lang="EN-US"><o:p></o:p></span></p>         <!-- ref --><p style="margin: 0cm 0cm 0.0001pt;"><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);" lang="EN-US"><a name="55"></a><a href="#-55">55</a>.&nbsp;&nbsp;&nbsp;&nbsp;<span style="">Dukkipati SR, Kuck KH, Neuzil P, Woollett I, Kautzner J, McElderry HT, et al. </span>Pulmonary vein isolation using a visually guided laser balloon catheter: the first 200-patient multicenter clinical experience. </span><span style="font-size: 10pt; font-family: Verdana; color: rgb(31, 26, 23);">Circ Arrhythm Electrophysiol 2013;6(3): 467-72.    &nbsp; </span><span style="font-size: 10pt; font-family: Verdana;"><o:p></o:p></span></p>     </div>          ]]></body><back>
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