<?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>S1688-04202014000100015</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Síndrome coronario agudo: estatinas. ¿Cuanto antes mejor?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gambogi]]></surname>
<given-names><![CDATA[Rosana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Fondo Nacional de Recursos Dirección Técnica Médica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2014</year>
</pub-date>
<volume>29</volume>
<numero>1</numero>
<fpage>110</fpage>
<lpage>121</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202014000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202014000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202014000100015&amp;lng=en&amp;nrm=iso"></self-uri><kwd-group>
<kwd lng="es"><![CDATA[SÍNDROME CORONARIO AGUDO]]></kwd>
<kwd lng="es"><![CDATA[HIPERCOLESTEROLEMIA - quimioterapia]]></kwd>
<kwd lng="es"><![CDATA[ANTICOLESTEROLEMIANTES - administración & dosificación]]></kwd>
<kwd lng="en"><![CDATA[ACUTE CORONARY SYNDROME]]></kwd>
<kwd lng="en"><![CDATA[HYPERCHOLESTEROLEMIA - drug therapy]]></kwd>
<kwd lng="en"><![CDATA[ANTICHOLESTEROLEMIC AGENTS - administration & dosage]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[        <basefont size="3"> <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"><b>Art&iacute;culo de revisi&oacute;n&nbsp;</b></font></p>           <p align="left"><b><font face="Verdana" size="4"> S&iacute;ndrome coronario agudo:       estatinas. &iquest;Cuanto antes mejor?&nbsp; </font></b></p>           <p align="left"><font face="Verdana" size="2"> Dra. Rosana Gambogi<sup><a name="-a."></a></sup></font><font color="#d62437" face="Candara"><a href="#a."><font face="Verdana" size="2"><sup>1</sup></font></a></font><font face="Verdana" size="2">&nbsp; </font>   <basefont size="3"> </p>           <p align="left"><font face="Verdana" size="2"><a name="a."></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-a.">1</a></font><font face="Verdana" size="2">. Direcci&oacute;n T&eacute;cnica M&eacute;dica del Fondo Nacional de Recursos.    <br>         Correo electr&oacute;nico: </font><font color="#1f1a17" face="Verdana" size="2">   <a href="mailto:rosanagam@gmail.com">rosanagam@gmail.com</a></font><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"><b>    <br>         Palabras clave:</b>    <br>         &nbsp;&nbsp;&nbsp;&nbsp;S&Iacute;NDROME CORONARIO AGUDO    <br>       &nbsp;&nbsp;&nbsp;&nbsp;HIPERCOLESTEROLEMIA &ndash; quimioterapia    ]]></body>
<body><![CDATA[<br>       &nbsp;&nbsp;&nbsp;&nbsp;ANTICOLESTEROLEMIANTES &ndash; administraci&oacute;n &amp; dosificaci&oacute;n&nbsp;</font></p> <font face="Verdana" size="2"><b>Key words:    <br> </b>&nbsp; &nbsp;ACUTE CORONARY SYNDROME    <br> &nbsp; &nbsp;HYPERCHOLESTEROLEMIA - drug therapy    <br> &nbsp; &nbsp;ANTICHOLESTEROLEMIC AGENTS - administration &amp; dosage    <br> </font>          <p align="left"><font face="Verdana" size="2"><b>1 - &iquest;Qu&eacute; dice la evidencia?&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Beneficios de las estatinas a largo plazo&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> El descubrimiento de las estatinas represent&oacute; uno de los avances terap&eacute;uticos  m&aacute;s trascendente de las &uacute;ltimas d&eacute;cadas. Las estatinas revolucionaron el  tratamiento de la hipercolesterolemia, sin embargo, en tanto otros mecanismos  independientes al descenso del colesterol juegan un rol importante, hoy  d&iacute;a se las considera, m&aacute;s que f&aacute;rmacos hipolipemiantes, agentes antiaterog&eacute;nicos  e inmunomoduladores.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Su introducci&oacute;n en la pr&aacute;ctica cl&iacute;nica tuvo impacto positivo en la prevenci&oacute;n  primaria y secundaria de la enfermedad coronaria (EC). La vasta informaci&oacute;n  disponible, procedente de estudios de investigaci&oacute;n b&aacute;sica y ensayos cl&iacute;nicos,  reafirma los beneficios conocidos en diferentes escenarios y extiende las  indicaciones de uso. Los efectos antiaterog&eacute;nicos y los beneficios cl&iacute;nicos  se producen en un amplio espectro de tiempo que var&iacute;a desde d&iacute;as a a&ntilde;os  despu&eacute;s del inicio del tratamiento.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Los primeros estudios exploraron el efecto de la terapia con estatinas  sobre la progresi&oacute;n y regresi&oacute;n de la EC, si bien los cambios angiogr&aacute;ficos  fueron modestos como respuesta al tratamiento, los resultados cl&iacute;nicos  fueron significativos<a name="-1"></a><a name="-2"></a><a name="-3"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#1">1-3</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Los grandes ensayos cl&iacute;nicos posteriores aportaron  evidencia indiscutible. El tratamiento para la reducci&oacute;n del colesterol  con estatinas no solamente redujo la tasa de eventos coronarios mayores  en prevenci&oacute;n primaria y secundaria, sino que adem&aacute;s redujo la mortalidad  total<a name="-4"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#4">4</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp;</font></p>           ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> Desde la d&eacute;cada de 1990 se realizaron m&uacute;ltiples estudios cl&iacute;nicos de intervenci&oacute;n  con estatinas a gran escala que mostraron consistentemente beneficios en  pacientes coronarios estables con diferentes niveles de colesterol basal,  incluidos ancianos, mujeres y pacientes diab&eacute;ticos<a name="-5"></a><a name="-6"></a><a name="-7"></a><a name="-8"></a><a name="-9"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#5">5-9</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El metaan&aacute;lisis  publicado por LaRosa y colaboradores, que incluy&oacute; a 17.617 pacientes, mostr&oacute;  que la reducci&oacute;n del riesgo de evento coronario mayor, mortalidad cardiovascular  y mortalidad total fue 30%, 27% y 23%, respectivamente<a name="-10"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#10">10</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Un an&aacute;lisis  que combin&oacute; tres estudios randomizados mostr&oacute; en el an&aacute;lisis por subgrupos  que el tratamiento con pravastatina durante cinco a&ntilde;os podr&iacute;a evitar una  muerte cada 50 pacientes con antecedente de infarto agudo de miocardio  (IAM) y cada 54 pacientes con angina inestable</font><sup><font face="Verdana" size="2"><a name="-11"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#11">11</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><font size="2">.&nbsp;</font> </font></p>           <p align="left"><font face="Verdana" size="2"> La cuesti&oacute;n es cu&aacute;ndo iniciar una estatina. La investigaci&oacute;n se focaliz&oacute;  inicialmente en el rol de las estatinas administradas meses despu&eacute;s de  un evento coronario. Por otra parte, el momento en el cual el tratamiento  comienza a ser efectivo est&aacute; menos claro. En algunos estudios los beneficios  se observaron entre uno a dos a&ntilde;os de seguimiento, en otros a los seis  meses. Los beneficios cl&iacute;nicos tempranos</font><sup><font face="Verdana" size="2"><a name="-12"></a><a name="-13"></a><a name="-14"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#12">12-14</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">, el efecto mayor al esperado  respecto al grado de descenso del C-LDL</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#7">7</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#12">12</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">, la desproporci&oacute;n entre la  reducci&oacute;n de eventos cl&iacute;nicos y la estenosis en los estudios angiogr&aacute;ficos  pusieron de manifiesto posibles mecanismos de acci&oacute;n no lip&iacute;dicos, que  pudieran ser &uacute;tiles en situaciones de mayor inestabilidad luego de un evento  coronario agudo. Los efectos pleiotr&oacute;picos de las estatinas sobre la estabilizaci&oacute;n  de placa, la funci&oacute;n endotelial, la inflamaci&oacute;n y la trombogenicidad, orientaron  la investigaci&oacute;n a evaluar el impacto de las estatinas iniciadas precozmente  durante la hospitalizaci&oacute;n por un s&iacute;ndrome coronario agudo (SCA).&nbsp; </font></p>            <p>&nbsp;</p>       <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> <b>Beneficios de las estatinas a corto plazo&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> Los resultados de los estudios observacionales fueron contradictorios.  El estudio de Aronow y colaboradores<a name="-15"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#15">15</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">, realizado a partir de los datos  de los estudios Gusto IIb y Pursuit, y el an&aacute;lisis de la informaci&oacute;n del  Registro Sueco de Cuidados Intensivos Coronarios</font><sup><font face="Verdana" size="2"><a name="-16"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#16">16</a></font><font face="Verdana" size="2">) </font> </sup> <font face="Verdana" size="2">mostraron que el tratamiento  precoz con estatinas luego de un SCA redujo la mortalidad a corto plazo.  Por otra parte, Newby no observ&oacute; relaci&oacute;n entre el inicio temprano de estatinas  y la mortalidad a 90 d&iacute;as y al a&ntilde;o, a partir del an&aacute;lisis de los datos  de los estudios SYMPHONY y SYMPHONY 2<a name="-17"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#17">17</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><font size="2">.&nbsp;</font> </font></p>           <p align="left"><font face="Verdana" size="2"> Desde el a&ntilde;o 2001 a la fecha se publicaron varios estudios randomizados  y metaan&aacute;lisis que abordaron el tema. En el estudio MIRACL</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#13">13</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"> se incluyeron  3.086 pacientes asignados al azar a recibir, 24 a 96 horas luego de su  ingreso por un SCA, 80 mg de atorvastatina o placebo durante 16 semanas.  El objetivo final primario [IAM no fatal, paro cardiorrespiratorio resucitado  (PCR), isquemia recurrente que requiri&oacute; hospitalizaci&oacute;n], fue menos frecuente  en el grupo tratado (14,8% versus 17,4%, RR 0,84, IC95%, 0,70-1,00 p =  0,048). El beneficio fue sobre todo debido a la reducci&oacute;n de la isquemia  sintom&aacute;tica (RR 0,74, IC95% 0,57-0,95 p = 0,02). El tratamiento con atorvastatina  no redujo la mortalidad, el PCR, el IAM ni la necesidad de revascularizaci&oacute;n.&nbsp; </font></p>            <p align="left"><font face="Verdana" size="2"> El tratamiento intensivo con estatinas luego de un SCA tambi&eacute;n fue evaluado  en los estudios PROVE IT-TIMI 22 y A To Z. El estudio PROVE IT-TIMI 22  fue una investigaci&oacute;n en la que se compar&oacute; la eficacia del tratamiento  intensivo con estatinas (atorvastatina 80 mg/d&iacute;a) frente a un tratamiento  moderado (pravastatina 40 mg/d&iacute;a) para prevenir la aparici&oacute;n de nuevos  eventos coronarios. El estudio incluy&oacute; a 4.162 pacientes seguidos en promedio  durante dos a&ntilde;os, el tratamiento se inici&oacute; dentro de los diez d&iacute;as del  ingreso o luego de la realizaci&oacute;n de angioplastia coronaria en los casos  que requirieron este procedimiento. La media de seguimiento fue de 24 meses.  Se analiz&oacute; el evento combinado mortalidad global, IAM, angina inestable  que requiri&oacute; hospitalizaci&oacute;n, revascularizaci&oacute;n y accidente cerebrovascular.  Se demostr&oacute; que el tratamiento agresivo con estatinas redujo en 16% la  aparici&oacute;n de nuevos eventos cardiovasculares (22,4%, versus 26,3%; RR 0,84,  IC95%, 0,74-0,95, p = 0,005). El beneficio comenz&oacute; a observarse a 30 d&iacute;as  de la randomizaci&oacute;n y persisti&oacute; en el tiempo<a name="-18"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#18">18</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El beneficio temprano  reportado en los estudios previos no se observ&oacute; en la fase Z del estudio  A toZ. Este estudio incluy&oacute; a casi 4.500 pacientes con antecedente de IAM.  Se compar&oacute; un grupo asignado aleatoriamente a tratamiento precoz con simvastatina  40 mg por un mes, seguido de 80 mg versus otro grupo asignado a placebo  por cuatro meses, seguido de simvastatina 20 mg. La media de seguimiento  fue de 24 meses. En el grupo bajo tratamiento agresivo se observ&oacute; un descenso  marcado del C-LDL al primer y cuarto mes, no hubo diferencia significativa  en el objetivo primario (muerte cardiovascular, IAM, reingreso por SCA  o accidente cerebrovascular) durante los cuatro primeros meses (14,4% versus  16,7%, HR 0,89, IC95%, 0,76-1,04). Tampoco se observ&oacute; diferencia significativa  en el n&uacute;mero de muertes por cualquier causa (5,5% versus 6,7%: HR 0,79,  IC95%, 0,61-1,02). Un an&aacute;lisis <i>postho</i>c mostr&oacute; una reducci&oacute;n del evento  combinado en el grupo bajo tratamiento intensivo despu&eacute;s del cuarto mes  (HR 0,75, IC95%, 0,60-0,95)</font><sup><font face="Verdana" size="2"><a name="-19"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#19">19</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El estudio FLORIDA asign&oacute; al azar 540  pacientes con IAM a recibir 80 mg de fluvastatina o placebo. No se observ&oacute;  diferencias significativas entre ambos grupos en el n&uacute;mero de eventos isqu&eacute;micos  en el monitoreo electrocardiogr&aacute;fico ambulatorio ni en la ocurrencia de  eventos cl&iacute;nicos mayores a 12 meses del inicio</font><sup><font face="Verdana" size="2"><a name="-20"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#20">20</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El estudio PACT asign&oacute;  al azar 3.408 pacientes con SCA a recibir pravastatina o placebo. No se  encontr&oacute; reducci&oacute;n significativa del objetivo final primario a 30 d&iacute;as  (muerte, reinfarto, o readmisi&oacute;n por angina inestable), (11,6% versus 12,4%,  RR 0,94, IC95%, 0,72-1,13)&nbsp;<a name="-21"></a> </font><sup> <font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#21">21</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. En la </font> <font color="#1f1a17" face="Verdana" size="2"> <a href="/img/revistas/ruc/v29n1/1a15t1.JPG">tabla 1</a></font><font face="Verdana" size="2"> se muestran las principales  caracter&iacute;sticas de los estudios precedentes</font><sup><font face="Verdana" size="2"><a name="-22"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#22">22</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp;     <br>      </font></p>            <p>   <multicol gutter="18" cols="2"></multicol>    </p>       <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> Varios trabajos mostraron beneficios asociados a la administraci&oacute;n de estatinas  antes y despu&eacute;s de un procedimiento cardiol&oacute;gico intervencionista (PCI).  El beneficio de iniciar estatinas previo a la realizaci&oacute;n de un PCI en  pacientes con SCA fue evaluado en el estudio ARMYDA-ACS</font><sup><font face="Verdana" size="2"><a name="-23"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#23">23</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Los pacientes  fueron asignados a recibir atorvastatina 80 mg 12 horas antes del procedimiento  y una dosis suplementaria de 40 mg preprocedimiento o placebo. La ocurrencia  de muerte, IAM o revascularizaci&oacute;n a 30 d&iacute;as del procedimiento fue menos  frecuente en el primer grupo (5% versus 17%; OR 0,12, IC95%, 0,05-0,50,  p = 0,004). Una investigaci&oacute;n subsecuente mostr&oacute; el efecto protector de  80 mg de atorvastatina antes de un PCI independientemente del uso previo  de estatinas<a name="-24"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#24">24</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Otros estudios mostraron menor incidencia de injuria  mioc&aacute;rdica posprocedimiento en quienes recibieron atorvastatina siete d&iacute;as  y 24 horas previo a la revascularizaci&oacute;n</font><sup><font face="Verdana" size="2"><a name="-25"></a><a name="-26"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#25">25</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#26">26</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Por otra parte, la administraci&oacute;n  de 80 mg de fluvastatina inmediatamente luego de efectuada una angioplastia  coronaria demostr&oacute; reducir los eventos cardiovasculares mayores. El beneficio  se inici&oacute; a 1,5 a&ntilde;os, fue independiente del nivel basal de colesterol y  se observ&oacute; en diab&eacute;ticos<a name="-27"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#27">27</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>            ]]></body>
<body><![CDATA[<p>   <multicol gutter="18" cols="2"></multicol>    <multicol gutter="18" cols="2"></multicol></p>          <p align="left"><font face="Verdana" size="2"> Briel y colaboradores publicaron un metaan&aacute;lisis que incluy&oacute; 12 estudios  y 13.000 pacientes con SCA con el objetivo de investigar si el empleo de  estatinas dentro de los 14 d&iacute;as del ingreso redujo la morbilidad cardiovascular  y la mortalidad total. Los autores concluyeron que el inicio temprano de  estatinas no redujo la muerte, el IAM o el accidente cerebrovascular a  uno y cuatro meses de seguimiento. La frecuencia de angina inestable fue  menor a partir de los cuatro meses del ingreso (4,8% versus 6,0%; RR, 0,80;  IC95%, 0,64-1,00<i> </i>p=0,05)<a name="-28"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#28">28</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>            <p align="left"><font face="Verdana" size="2"> Un metaan&aacute;lisis reciente que incluy&oacute; 18 estudios y 14.303 pacientes mostr&oacute;  resultados similares. El riesgo de angina inestable se redujo 25% a los  cuatro meses del SCA. Los efectos secundarios graves del tratamiento fueron  poco frecuentes (0,1%) y casi limitados a pacientes bajo tratamiento con  80 mg/d&iacute;a de simvastatina<a name="-29"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#29">29</a></font><font face="Verdana" size="2">) </font> </sup> <font face="Verdana" size="2">(tablas </font> <font color="#1f1a17" face="Verdana" size="2"> <a href="#tab_2">2</a></font><font face="Verdana" size="2">, </font> <font color="#1f1a17" face="Verdana" size="2"> <a href="#tab_3">3</a></font><font face="Verdana" size="2"> y</font><font color="#1f1a17" face="Verdana" size="2"><a href="/img/revistas/ruc/v29n1/1a15t4.JPG"> 4</a></font><font face="Verdana" size="2">).    <br>      &nbsp;     <br>       </font>       <basefont size="3"><font face="Verdana" size="2"><b><a name="tab_2"></a><img style="width: 570px; height: 467px;" alt="" src="/img/revistas/ruc/v29n1/1a15t2.JPG"></b></font><font face="Verdana" size="2">&nbsp;<font size="2"> </font>&nbsp;</font></p>          <p align="left"><font face="Verdana" size="2"><a name="tab_3"></a><img style="width: 570px; height: 510px;" alt="" src="/img/revistas/ruc/v29n1/1a15t3.JPG"></font></p>         <p align="left">&nbsp;</p>               <p align="left"><font face="Verdana" size="2"> <b>2 - De la evidencia a la pr&aacute;ctica cl&iacute;nica&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> Cuando el m&eacute;dico toma la decisi&oacute;n de iniciar estatinas en el curso de un  SCA, tiene en cuenta la evidencia disponible, el balance riesgo-beneficio  y la costo-efectividad del tratamiento propuesto. El inicio precoz de estatinas  tiene el objetivo de mejorar las estrategias centradas en los mecanismos  fisiopatol&oacute;gicos involucrados en el SCA y disminuir eventos cardiovasculares.  Si bien no existe consenso respecto al momento &oacute;ptimo, los datos disponibles  sugieren que cuanto antes se inicie el tratamiento, mayor ser&aacute; el beneficio  esperado</font><sup><font face="Verdana" size="2"><a name="-30"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#30">30</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Por otra parte, siguen existiendo interrogantes a resolver en la pr&aacute;ctica  cl&iacute;nica.&nbsp; </font></p>           ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Tratamiento intensivo versus tratamiento est&aacute;ndar.</b><i> </i>Los ensayos cl&iacute;nicos  m&aacute;s recientes han focalizado el inter&eacute;s en determinar el beneficio del  tratamiento intensivo con estatinas a dosis altas respecto a dosis est&aacute;ndar  en pacientes coronarios estables<a name="-31"></a><a name="-32"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#31">31</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#32">32</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"> y en el curso de un SCA</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#18">18</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El  metaan&aacute;lisis publicado por CholesterolTreatementTrialists (CTT) Collaboration  compar&oacute; el tratamiento intensivo respecto al tratamiento convencional en  cinco estudios y 39.612 pacientes portadores de enfermedad coronaria estable  o cursando un SCA. El tratamiento intensivo se asoci&oacute; a una mayor reducci&oacute;n  (15%; IC95% 11-18; p &lt; 0,0001) de eventos cardiovasculares mayores (muerte  coronaria o IAM no fatal, revascularizaci&oacute;n y accidente cerebrovascular)  a cinco a&ntilde;os respecto al tratamiento convencional. El resultado fue independiente  del nivel basal de C-LDL, y no se identific&oacute; un umbral por debajo del cual  no se observara beneficio<a name="-33"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#33">33</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><font size="2">.&nbsp;</font> </font></p>            <p>   <multicol gutter="18" cols="2"></multicol>    <multicol gutter="18" cols="2"></multicol></p>          <p align="left"><font face="Verdana" size="2"> Mills y colaboradores reportaron, en un nuevo metaan&aacute;lisis, reducci&oacute;n de  la mortalidad global (RR 0,75, IC95%, 0,61-0,91, p = 0,005, I<sup>2 </sup>= 0%) y  cardiovascular (RR 0,74, IC95%, 0,59-0,94, p = 0,013, I<sup>2 </sup>= 0%) &uacute;nicamente  para el subgrupo de estudios que incluyeron a pacientes en tratamiento  intensivo en el curso de un SCA<a name="-34"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#34">34</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Sin embargo, los autores no encontraron  diferencias para el evento combinado mortalidad coronaria o IAM no fatal  (RR 0,85, IC95%, 0,71-1,03, p = 0,10, I<sup>2 </sup>= 32%).&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Seguridad.</b><i> </i>Las estatinas son f&aacute;rmacos generalmente bien tolerados. Considerando  los ensayos cl&iacute;nicos aleatorizados, la terapia con estatinas parece asociarse  a un leve incremento de efectos adversos respecto a placebo</font><sup><font face="Verdana" size="2"><a name="-35"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#35">35</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. La elevaci&oacute;n  persistente de transaminasas ocurre en 0,5% a 3,0% de los pacientes que  reciben estatinas, siendo muy infrecuente la falla hep&aacute;tica<a name="-36"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#36">36</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Algunos  autores atribuyen la elevaci&oacute;n de las transaminasas al descenso de los  niveles lip&iacute;dicos<a name="-37"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#37">37</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. La frecuencia de mialgias se sit&uacute;a entre 2% y 11%,  siendo infrecuente la rabdomiolisis (0,1%)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#37">37</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Un estudio reciente mostr&oacute;  incremento en el riesgo de luxaciones, torceduras y esguinces (13%) en  pacientes tratados con estatinas, en especial en aquellos que realizaban  actividad f&iacute;sica<a name="-38"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#38">38</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Cuando se analizan los resultados reportados por  varios metaan&aacute;lisis<a name="-39"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#28">28</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#29">29</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#32">32</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#34">34</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#39">39</a></font><font face="Verdana" size="2">) </font> </sup> <font face="Verdana" size="2">que consideraron el uso de dosis altas  de estatinas, la frecuencia de eventos adversos graves tambi&eacute;n fue baja,  si bien se observ&oacute; mayor riesgo de injuria muscular (RR 4,69, IC95%, 1,01-21,67)  y elevaci&oacute;n de transaminasas (2,49, IC95%, 1,16-5,37) en los pacientes  en tratamiento intensivo respecto a los controles</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#29">29</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Silva y colaboradores  tambi&eacute;n reportaron alteraciones en los niveles de transaminasas (OR = 4,48;  IC95%, 3,27-6,16; p &lt; 0,01) y creatinquinasas (CK) asociadas a dosis altas  de estatinas (OR = 9,97; IC95%, 1,28-77,92; p = 0,028)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#39">39</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Es necesario  continuar investigando para determinar si los resultados publicados aplican  a la pr&aacute;ctica habitual particularmente en pacientes ancianos, con comorbilidades  asociadas y multimedicados</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#35">35</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">,<sup> </sup>y si impactan en la adhesi&oacute;n al tratamiento.&nbsp; </font></p>            <p>  <multicol gutter="18" cols="2"></multicol> </p>          <p align="left"><font face="Verdana" size="2"> Como posibles efectos adversos del tratamiento mantenido con estatinas,  se ha se&ntilde;alado el aumento de la glucemia y HbA1c, y un ligero incremento  de riesgo de desarrollar diabetes mellitus dependiente de la dosis. Sin  embargo, el riesgo es bajo en t&eacute;rminos absolutos y cuando se compara con  la reducci&oacute;n de eventos coronarios</font><sup><font face="Verdana" size="2"><a name="-40"></a><a name="-41"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#40">40</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#41">41</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. En el estudio de Ko y colaboradores,  en pacientes mayores de 65 a&ntilde;os con diagn&oacute;stico de SCA, el tratamiento  intensivo con estatinas redujo el riesgo de hospitalizaci&oacute;n o muerte y  no aument&oacute; el riesgo de diabetes respecto al grupo bajo tratamiento est&aacute;ndar<a name="-42"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#42">42</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Riesgos asociados a niveles muy bajos de C-LDL.</b> Diferentes ensayos cl&iacute;nicos  y metaan&aacute;lisis que incluyeron pacientes estables y con diagn&oacute;stico de SCA  revelaron la posibilidad de obtener beneficios adicionales en la reducci&oacute;n  del riesgo cardiovascular alcanzando niveles m&aacute;s bajos de C-LDL, independientemente  del nivel basal<a name="-43"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#18">18</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#32">32</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#33">33</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#43">43</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Las estatinas mantuvieron su eficacia en  pacientes previamente no tratados, cursando un SCA y niveles basales de  C-LDL menores a 80 mg/dl</font><sup><font face="Verdana" size="2"><a name="-44"></a><a name="-45"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#44">44</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#45">45</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Estos hallazgos fueron contrastados con nueva evidencia respecto al impacto  de alcanzar niveles muy bajos de C-LDL con estatinas. El tratamiento intensivo  con estatinas no tuvo efecto en la mortalidad de causa no cardiovascular,  incluida la mortalidad por c&aacute;ncer, enfermedad respiratoria o traumatismo  aun en pacientes con niveles basales de C-LDL menores a 77 mg/dl, ni habi&eacute;ndose  alcanzado niveles muy bajos de C-LDL</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#33">33</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. En un subestudio del PROVE IT  - TIMI 22 no se observaron resultados adversos en pacientes que alcanzaron  niveles de C-LDL menores a 40 mg/dl<a name="-46"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#46">46</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Perfil lip&iacute;dico. Oportunidad.</b><i> </i>En el curso del SCA se observan modificaciones  en los niveles de l&iacute;pidos plasm&aacute;ticos caracterizados por descenso del colesterol  total (47%), C-LDL (39%), del C-HDL (11%) y aumento de triglic&eacute;ridos (50%)</font><sup><font face="Verdana" size="2"><a name="-47"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#47">47</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.  Generalmente los niveles lip&iacute;dicos se mantienen estables durante las primeras  96 horas si bien comienza a observarse el descenso del C-LDL a las 24 horas  del inicio de los s&iacute;ntomas. En ese contexto, la evaluaci&oacute;n de la respuesta  a las estatinas luego de un SCA debiera diferirse hasta transcurridos al  menos dos meses, de forma de evitar considerar como verdaderos descensos  transitorios del C-LDL, secundarios al evento coronario agudo. Cuando se  realiza una revascularizaci&oacute;n temprana que limita la injuria mioc&aacute;rdica,  el impacto sobre el perfil lip&iacute;dico es menor<a name="-48"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#47">47</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#48">48</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>      <font face="Verdana" size="2">          <br>          </font>          <multicol gutter="18" cols="2"></multicol>     ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>3 - Gu&iacute;as de pr&aacute;ctica cl&iacute;nica&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> En base a la evidencia disponible las gu&iacute;as de pr&aacute;ctica cl&iacute;nica se&ntilde;alan:&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Perfil lip&iacute;dico.</b> No se recomienda la realizaci&oacute;n de un perfil lip&iacute;dico  durante la fase aguda de un evento coronario<a name="-49"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Es razonable realizar un perfil lip&iacute;dico en pacientes con SCA preferentemente  dentro de las primeras 24 horas del inicio de la sintomatolog&iacute;a (IIa, C)</font><sup><font face="Verdana" size="2"><a name="-50"></a><a name="-51"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#50">50</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#51">51</a></font><font face="Verdana" size="2">).</font></sup><font face="Verdana" size="2">&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Inicio de estatinas.</b> En pacientes con diagn&oacute;stico de SCA, el tratamiento  con estatinas debe iniciarse antes del alta (I, B)</font><sup><font face="Verdana" size="2"><a name="-52"></a><a name="-53"></a><a name="-54"></a><a name="-55"></a><a name="-56"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#52">52-56</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><i>. </i>Se recomienda  comenzarlo lo antes posible y no debe diferirse hasta disponer de un perfil  lip&iacute;dico</font><sup><font face="Verdana" size="2"><a name="-57"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#57">57</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Est&aacute; recomendado iniciar o continuar el tratamiento con estatinas en forma  precoz despu&eacute;s del ingreso en todos los pacientes con IAM con elevaci&oacute;n  del segmento ST sin contraindicaciones ni historia de intolerancia independientemente  de los valores iniciales de colesterol (I, A)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#55">55</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El tratamiento precoz  debe acompa&ntilde;arse de asesoramiento sobre estilo de vida y alimentaci&oacute;n saludable  e indicaciones para lograr el control de todos los factores de riesgo vascular  al alta.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Dosis y elecci&oacute;n de la estatina.</b> Los pacientes con SCA deben recibir un  tratamiento m&aacute;s intensivo con estatinas</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> El tratamiento con estatinas debe administrarse a altas dosis, ya que esto  se asocia a beneficios cl&iacute;nicos precoces y sostenidos. Se debe considerar  un tratamiento de menor intensidad en los pacientes con riesgo elevado  de desarrollar efectos secundarios (ancianos, pacientes con alteraciones  hep&aacute;ticas o renales, efectos secundarios previos o en los que haya riesgo  de interacci&oacute;n con otros tratamientos esenciales)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#55">55</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Si bien no existe consenso para afirmar que los beneficios reportados corresponden  a un efecto de clase de las estatinas a altas dosis o son espec&iacute;ficos de  la atorvastatina, teniendo en cuenta los resultados de los estudios con  dosis elevadas de atorvastatina</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#18">18</a></font><font face="Verdana" size="2">) </font> </sup> <font face="Verdana" size="2">y simvastatina</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#19">19</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">, los riesgos asociados  a la simvastatina a altas dosis y las restricciones de uso</font><sup><font face="Verdana" size="2"><a name="-58"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#58">58</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">, se recomienda  la administraci&oacute;n de atorvastatina 80 mg/d&iacute;a excepto intolerancia previa</font><sup><font face="Verdana" size="2"><a name="-59"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#55">55</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#59">59</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.  En pacientes tratados con estatinas bajo una modalidad diferente previo  al ingreso, Rosenson y colaboradores sugieren cambiar a atorvastatina 80  mg/d&iacute;a a excepci&oacute;n de los pacientes tratados con rosuvastatina 40 mg/d&iacute;a.  Esta recomendaci&oacute;n se sustenta en los resultados del estudio SATURN<a name="-60"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#60">60</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">,  que mostr&oacute; similar grado de regresi&oacute;n de placa a dosis m&aacute;ximas de ambas  estatinas.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> Casi la totalidad de las gu&iacute;as de pr&aacute;ctica cl&iacute;nica no establecen recomendaciones  respecto al mantenimiento del tratamiento con dosis altas de estatina.  El Comit&eacute; de Medicamentos y Terap&eacute;utica del Sistema de Salud de Gales sugiere  mantener el tratamiento con estatinas a altas dosis por tres meses, revalorar  al paciente con nuevo perfil lip&iacute;dico, y ajustar dosis de acuerdo a los  resultados obtenidos y la tolerancia. Pacientes con niveles de colesterol  total superior a 190 mg/dl deber&iacute;an continuar con tratamiento intensivo  (II, C)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#59">59</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Objetivo terap&eacute;utico a largo plazo.</b> Se recomienda reducir el C-LDL a &lt;  100 mg/dl (I, C)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#52">52</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#56">56</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. En pacientes de muy alto riesgo<a name="-a"></a></font><font color="#1f1a17" face="Verdana" size="2"><a href="#a">*</a></font><font face="Verdana" size="2"> es razonable  alcanzar una concentraci&oacute;n de C-LDL menor a 70 mg/dl o una reducci&oacute;n de  50% cuando no se alcanza el objetivo recomendado (IIa, C)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#52">52</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#54">54</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#55">55</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. La  gu&iacute;a de pr&aacute;ctica cl&iacute;nica del National Institute for Health and Clinical  Excellence (NICE) no establece de forma expl&iacute;cita valores objetivo de l&iacute;pidos.  Deben adem&aacute;s considerarse otras alteraciones lip&iacute;dicas presentes. En pacientes  de muy alto riesgo</font><font color="#1f1a17" face="Verdana" size="2"><a href="#a">*</a></font><font face="Verdana" size="2"> que tienen niveles de triglic&eacute;ridos &sup3; 200 mg/dl se  recomienda alcanzar un nivel de C-No HDL<a name="-b"></a></font><font color="#1f1a17" face="Verdana" size="2"><a href="#b">**</a></font><font face="Verdana" size="2"> menor a 100 mg/dl (IIa, B)</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#52">52</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> <b>Seguimiento.</b> Tras un SCA es aconsejable diferir el primer control lip&iacute;dico  hasta transcurridos dos o tres meses del SCA<a name="-61"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#61">61</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Se deben controlar  los l&iacute;pidos en sangre cada cuatro a seis semanas para determinar si se  alcanzaron los objetivos terap&eacute;uticos y ajustar el tratamiento</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#54">54</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Logrado  el objetivo, es razonable realizar perfil lip&iacute;dico cada seis a doce meses</font><sup><font face="Verdana" size="2"><a name="-62"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#62">62</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#50">50</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><font size="2">.&nbsp;</font> </font></p>          <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> No se recomienda la monitorizaci&oacute;n rutinaria de CK en pacientes asintom&aacute;ticos  tratados con estatinas</font><sup><font face="Verdana" size="2"><a name="-63"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#63">63</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Los pacientes deben recibir instrucciones  precisas sobre los s&iacute;ntomas de alerta (mialgia, fatigabilidad). El riesgo  de miopat&iacute;a puede minimizarse si se identifica a los pacientes vulnerables  o se evita la interacci&oacute;n de las estatinas con f&aacute;rmacos espec&iacute;ficos</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#54">54</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">  (</font><font color="#1f1a17" face="Verdana" size="2"><a href="#tab_5">tabla 5</a></font><font face="Verdana" size="2">). Frente a la presencia de s&iacute;ntomas se recomienda excluir otras  causas y determinar los niveles de CK para definir conducta</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#37">37</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#63">63</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font><font face="Verdana"><font size="2">    <br>       </font>       <basefont size="3"> </font> </p>           <p align="left"> <font face="Verdana" size="2"><b><a name="tab_5"></a><img style="width: 571px; height: 508px;" alt="" src="/img/revistas/ruc/v29n1/1a15t5.JPG"></b>&nbsp;</font></p>           <p align="left"><font face="Verdana" size="2"> Para algunos expertos no es necesaria la monitorizaci&oacute;n de rutina del nivel  de transaminasas</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#37">37</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#58">58</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#63">63</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. Se recomienda medir el nivel de transaminasas  antes de iniciar el tratamiento con estatinas y el seguimiento cl&iacute;nico</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#63">63</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.  Otros autores proponen un &uacute;nico control a las cuatro a seis semanas si  se incrementan las dosis o ante la presencia de s&iacute;ntomas</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#37">37</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><font size="2">.&nbsp;</font> </font></p>           <p align="left"><font face="Verdana" size="2"> El panel de expertos sobre seguridad del uso de estatinas considera seguro  el empleo de estatinas en pacientes portadores de hepatopat&iacute;a cr&oacute;nica estable,  h&iacute;gado graso y esteatohepatitis no alcoh&oacute;lica</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#63">63</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>      <font face="Verdana" size="2">          <br>       </font>           <p align="left"><font face="Verdana" size="2"> <b>4 - Adherencia al tratamiento. El desaf&iacute;o despu&eacute;s del alta&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> En individuos de alto riesgo vascular la evidencia acumulada muestra los  beneficios del control adecuado de los factores de riesgo vascular y el  uso de algunos f&aacute;rmacos en particular. Sin embargo, el estudio comparado  de las encuestas EUROASPIRE I, II y III mostr&oacute; que un gran n&uacute;mero de pacientes  no alcanzan los objetivos terap&eacute;uticos respecto a estilo de vida, control  de factores de riesgo y utilizaci&oacute;n de f&aacute;rmacos cardioprotectores</font><sup><font face="Verdana" size="2"><a name="-64"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#64">64</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.  Asimismo, la adherencia a la medicaci&oacute;n a largo plazo contin&uacute;a siendo baja  e impacta en la ocurrencia de nuevos eventos. Al cabo de una semana, 25%  de los pacientes no adhiere a las recomendaciones y al a&ntilde;o menos del 50%  refiere el uso continuado de estatinas, bloqueadores beta o antihipertensivos<a name="-65"></a></font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#65">65</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> En respuesta se han implementado programas de prevenci&oacute;n secundaria. Estos  programas demostraron mejorar el proceso de atenci&oacute;n y disminuir los eventos  coronarios y la mortalidad</font><sup><font face="Verdana" size="2"><a name="-66"></a><a name="-67"></a><a name="-68"></a><a name="-69"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#66">66-69</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. En particular, el inicio precoz de estatinas  durante la internaci&oacute;n luego de un SCA redujo la incidencia de eventos</font><sup><font face="Verdana" size="2"><a name="-70"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#70">70</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.<sup>&nbsp;</sup> </font></p>           <p align="left"><font face="Verdana" size="2"> El Fondo Nacional de Recursos implement&oacute; un programa de prevenci&oacute;n, integral  y multidisciplinario, que comprende educaci&oacute;n, acceso gratuito a la medicaci&oacute;n  y seguimiento sistem&aacute;tico para pacientes revascularizados, en febrero de  2004. A la fecha se incorporaron m&aacute;s de 4.000 pacientes. El programa permiti&oacute;  mejorar las cifras de presi&oacute;n arterial, los niveles de los l&iacute;pidos, la  cesaci&oacute;n del consumo de tabaco y la prescripci&oacute;n y adherencia a medicamentos  cardioprotectores. Al a&ntilde;o, la proporci&oacute;n de pacientes que alcanz&oacute; el objetivo  fue 70,3% para presi&oacute;n arterial, 73,2% para C-LDL y logr&oacute; abstinencia mantenida  60,8% de los fumadores. Se observ&oacute; adem&aacute;s un incremento en el logro de  las metas terap&eacute;uticas en funci&oacute;n del tiempo de permanencia en el programa.  La proporci&oacute;n de pacientes a quienes se prescribi&oacute; estatinas fue de 98,2%  y reportaron buena adherencia al tratamiento farmacol&oacute;gico 91,5% de los  pacientes al a&ntilde;o. El programa fue tambi&eacute;n eficaz en disminuir la ocurrencia  del evento combinado muerte o revascularizaci&oacute;n en toda la poblaci&oacute;n as&iacute;  como en disminuir la mortalidad global a corto (28 meses) y mediano plazo  (cuatro a&ntilde;os) en pacientes del subsector p&uacute;blico de asistencia. La supervivencia  libre del evento combinado a cuatro a&ntilde;os fue de 81,2% y 79,3% en el grupo  programa y control respectivamente (HR = 0,83, p = 0,028). La supervivencia  en los pacientes del sector p&uacute;blico fue de 93,2% y 88,5% en el grupo programa  y control (HR =0,62, p=0,023)</font><sup><font face="Verdana" size="2"><a name="-71"></a><a name="-72"></a>(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#71">71</a></font><font face="Verdana" size="2">,</font><font color="#1f1a17" face="Verdana" size="2"><a href="#72">72</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. La evidencia disponible justifica  la implementaci&oacute;n de programas de prevenci&oacute;n secundaria a mayor escala  as&iacute; como la incorporaci&oacute;n precoz de los pacientes luego de un SCA.&nbsp; </font></p>      <font face="Verdana" size="2">          <br>       </font>           <p align="left"><font face="Verdana" size="2"> <b>5 - Conclusiones&nbsp;</b> </font></p>           <p align="left"><font face="Verdana" size="2"> Las estatinas a trav&eacute;s de sus efectos pleiotr&oacute;picos modulan r&aacute;pidamente  los mecanismos fisiopatol&oacute;gicos involucrados en las complicaciones agudas  aterotromb&oacute;ticas en pacientes coronarios</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#30">30</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> La informaci&oacute;n respecto al inicio precoz de estatinas luego de un SCA es  consistente acerca de la reducci&oacute;n de la ocurrencia de angina inestable  a corto plazo, no as&iacute; para mortalidad, IAM o accidente cerebrovascular,  si bien existe una tendencia favorable. Por otra parte, los resultados  a largo plazo sugieren un beneficio acumulativo</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#29">29</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> El uso de estatinas es seguro en monoterapia aun a altas dosis, sin embargo  exige una indicaci&oacute;n individualizada considerando la ecuaci&oacute;n riesgo-beneficio  y el seguimiento sistem&aacute;tico. El inicio durante la internaci&oacute;n mejora adem&aacute;s  la adherencia al tratamiento</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#70">70</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">. El tratamiento intensivo con estatinas  fue costo-efectivo en relaci&oacute;n al tratamiento a dosis baja en pacientes  con diagn&oacute;stico de SCA</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#49">49</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"> De acuerdo a la evidencia disponible parece razonable el tratamiento intensivo  y precoz con estatinas durante la internaci&oacute;n por un SCA, recomendado en  la mayor&iacute;a de las gu&iacute;as de pr&aacute;ctica cl&iacute;nica. Asimismo est&aacute; plenamente justificada  la implementaci&oacute;n de programas de prevenci&oacute;n secundaria para mejorar la  atenci&oacute;n y el pron&oacute;stico de los pacientes coronarios luego de un evento  agudo.&nbsp; </font></p>      <font face="Verdana" size="2">          <br>        </font>            <p>   <basefont size="3"> </p>          ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"><a name="a"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-a">*</a></font><font face="Verdana" size="2"> Enfermedad cardiovascular documentada, SCA, IAM, procedimiento de revascularizaci&oacute;n   coronaria u otro, ictus isqu&eacute;mico, enfermedad arterial perif&eacute;rica, diabetes   mellitus con otros factores de riesgo vascular o lesi&oacute;n de &oacute;rgano diana,   enfermedad renal cr&oacute;nica grave (FG &lt; 30 ml/min/1,73 m<sup>2)</sup>, estimaci&oacute;n del     riesgo cardiovascular seg&uacute;n SCORE &sup3; 10%)<sup>(54)</sup>.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"><a name="b"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-b">**</a></font><font face="Verdana" size="2"> El C-No HDL se define como la diferencia entre el valor de colesterol   total y el colesterol de las HDL, e incluye el colesterol en las LDL, IDL   y VLDL.&nbsp;</font></p>      <p align="left">&nbsp;</p>       <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> <b>Bibliograf&iacute;a&nbsp;</b></font></p>            <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="1"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-1">1</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Brown G, Albers JJ, Fisher LD, Schaefer SM, Lin JT, Kaplan C, et al.</b>  Regression of coronary artery disease as a result of intensive lipid-lowering  therapy in men with high levels of apolipoprotein B. N Engl J Med 1990;323(19):1289-98.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="2"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-2">2</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Jukema JW, Bruschke AV, van Boven AJ, Reiber JH, Bal ET, Zwinderman AH,  et al.</b> Effects of lipid lowering by pravastatin on progression and regression  of coronary artery disease in symptomatic men with normal to moderately  elevated serum colesterol levels. The Regression Growth Evaluation Statin  Study (REGRESS). Circulation 1995; 91(10):2528-40.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="3"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-3">3</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Herd JA, Ballantyne CM, Farmer JA, Ferguson JJ 3rd, Jones PH, West MS,  et al. </b>Effects of fluvastatin on coronary atherosclerosis in patients with  mild to moderate cholesterol elevations( Lipoprotein and Coronary Atherosclerosis  Study LCAS). Am J Cardiol 1997; 80 (3):278-86.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="4"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-4">4</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Vaughan CJ, Gotto AM Jr, Basson CT.</b> The Evolving Role of Statins in the  Management of Atherosclerosis. JACC 2000; 35(1):1-10.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="5"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-5">5</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;Randomised trial of cholesterol lowering in 4444 patients with coronary  heart disease: the Scandinavian Simvastatin Survival Study (4S). Lancet  1994; 344(8934):1383-9.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="6"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-6">6</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;Prevention of cardiovascular events and death with pravastatin in patients  with coronary heart disease and a broad range of initial cholesterol leavels.  The Long Term Intervention with Pravastatin in Ischaemic Disease (LIPID)  Study Group. N Engl J Med 1998 Nov 5; 339(19):1349-57.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="7"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-7">7</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Sacks FM, Pfeffer MA, Moye LA, Rouleau JL, Rutherford JD, Cole TG, et  al. </b>The effect of pravastatin on coronary events after myocardial infarction  in patients with average colesterolleavels.Cholesterol and Recurrent Events  Trial investigators. N Engl J Med 1996; 335 (14):1001-9.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="8"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-8">8</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Heart Protection Study Collaborative Group.</b> MRC/BHF Heart Protection  Study of cholesterol lowering with simvastatin in 20.536 high-risk individuals:  a randomised placebo-controlled trial. Lancet 2002;360(9326):7-22.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="9"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-9">9</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Shepherd J, Blauw GJ, Murphy MB, Bollen EL, Buckley BM, Cobbe SM, et  al. </b>Pravastatin in elderly individuals at risk of vascular disease (PROSPER):  a randomised controlled trial. Lancet 2002; 360(9346):1623-30.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="10"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-10">10</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>LaRosa JC, He J, Vupputuri S. </b>Effect of statins on the risk of coronary  disease: a meta-analysis of randomized controlled trials. JAMA 1999; 282(24):2340-6.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="11"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-11">11</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Simes J, Furberg CD, Braunwald E, Davis BR, Ford I, Tonkin A, et al.  </b>Effects of pravastatin on mortality in patients with and without coronary  heart disease across a broad range of cholesterol levels. The Prospective  Pravastatin Pooling Project. Eur Heart J 2002; 23(3):207-15.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="12"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-12">12</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;Influence of pravastatin and plasma lipids on clinical events in the  West of Scotland Coronary Prevention Study (WOSCOPS). Circulation 1998;  97(15):1440-5.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="13"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-13">13</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Schwartz GG, Olsson AG, Ezekowitz MD, Ganz P, Oliver MF, Waters D, et  al.</b> Effects of atorvastatin on early recurrent ischemic events in acute  coronary syndromes: the MIRACL study: a randomized controlled trial. JAMA  2001; 285: 1711-1718.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="14"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-14">14</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Ray KK, Cannon CP, Mccabe CH, Cairns R, Tonkin AM, Sacks FM, et al.  </b>Early and late benefits of high-dose atorvastatin in patients with acute  coronary syndromes: results from the PROVE IT-TIMI 22 trial. J Am Coll  Cardiol 2005; 46: 1405-1410.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="15"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-15">15</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Aronow HD, Topol EJ, Roe MT, Houghtaling PL, Wolski KE, Lincoff AM,  et al.</b> Effect of lipid-lowering therapy on early mortality after acute  coronary syndromes: an observational study. Lancet 2001; 357(9262):1063-8.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="16"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-16">16</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Stenestrand U, Wallentin L.</b> Early statin treatement following acute  coronary myocardial infarction and 1-year survival. Swedish Register of  Cardiac Intensive Care (RIKS-HIA). JAMA 2001; 285(4): 430-6.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="17"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-17">17</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Newby LK, Kristinsson A, Bhapkar MV, Aylward PE, Dimas AP, Klein WW,  et al. </b>Early statin initiation and outcomes in patients with acute coronary  syndromes. JAMA 2002; 287 (23):3087-95.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="18"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-18">18</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Cannon CP, Braunwald E, McCabe CH, Rader DJ, Rouleau JL, Belder R, et  al. </b>Intensive versus moderate lipid lowering withstatins after acute coronary  syndromes. N Engl J Med 2004; 350(15): 1495-504.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="19"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-19">19</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>de Lemos JA, Blazing MA, Wiviot SD, Lewis EF, Fox KA, White HD, et al.</b>  Early intensive vs delayed conservative simvastatin strategy in patients  with acute coronary s&iacute;ndrome: phase Z of the A to Z trial. JAMA 2004;292  (11):1307-16.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="20"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-20">20</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Liem A, Van Boven A, Veeger N, Withagen A, Robles De Medina R, Tiissen  J, et al. </b>Effect of fluvastatin on ischaemia following acute myocardial  infarction: a randomized trial. Eur Heart J 2002; 23(24):1931-7.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="21"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-21">21</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Thompson P, Meredith I, Amerena J, Campbell T, Sloman J, Harris P.</b> Effect  of pravastatin compared with placebo initiated within 24 hours of onset  of acute myocardial infarction or unstable angina: the Pravastatin in Acute Coronary Treatment (PACT) trial. Am Heart J 2004; 148: e2.    </font></p>           <multicol gutter="18" cols="2"></multicol>     <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="22"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-22">22</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Lama A, Vega J.</b> Uso de estatinas en el SCA . Rev M&eacute;d Chile 2008; 136:1083-5.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="23"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-23">23</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Patti G, Pasceri V, Colonna G, Miglionico M, Fischetti D, Sardella G,  et al.</b> Atorvastatin pretreatment improves outcomes in patients with acute  coronary s&iacute;ndrome undergoing early percutaneous coronary intervention:results  of the ARMYDA-ACS randomized trial. J Am Coll Cardiol 2007; 49(12): 1272-8.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="24"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-24">24</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Di Sciasio G, Patti G, Pasceri V, Gaspardone A, Colonna G, Montinaro  A.</b> Efficacy of atorvastatin reload in patients on chronic statin therapy  undergoing percutaneous coronary intervention: results of de ARMYDA-RECAPTURE  randomized trial. J Am Cardiol 2009; 54(6):558-65.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="25"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-25">25</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Pasceri V, Patti G, Nusca A, Pristipino C, Richichi G, Di Sciascio G, et al.</b> Randomized trial of atorvastatin for reduction of myocardial damage  during coronary intervention: results from the ARMYDA (Atorvastatin for  Reduction of Myocardial Danage during Ansioplsaty) study. Circulation 2004;  110(6):674-8.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="26"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-26">26</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Briguori C, Visconti G, Focaccio A, Golia B, Chieffo A, Castelli A, et al. </b>Novel approaches for preventing or limiting events (Naples II)trial:impact  of a single high dose of atorvastatin on periprocedural myocardial infarction.  J Am Coll Cardiol 2009; 54(23):2157-63.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="27"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-27">27</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Serruys PW, de Feyter P, Macaya C, Kokott N, Puel J, Vrolix M, et al.  </b>Fluvastatin for prevention of cardiacs events following successful first  percutaneous coronary intervention: a randomized controlled trial. JAMA  2002; 287(24):3215-22.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="28"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-28">28</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Briel M, Schwartz GG, Thompson PL, de Lemos JA, Blazing MA, van Es GA,  et al. </b>Effects of early treatment with statins on short-term clinical outcomes  in acute coronary syndromes: a meta-analysis of randomized controlled trials.  JAMA 2006; 295(17):2046-56.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="29"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-29">29</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Vale N, Nordmann AJ, Schwartz GG, de Lemos J, Colivicchi F, den Hartog  F, et al.</b> Statins for acute coronary syndrome. Cochrane Database Syst Rev  2011 Jun 15;(6):CD006870. DOI: 10.1002/ 14651858.CD006870.pub2.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="30"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-30">30</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Angeli F, Reboldi G, Mazzotta G, Garofoli M, Cerasa MF, Verdecchia P.</b>  Statins in acute coronary syndrome: very early initiation and benefits.  Ther Adv Cardiovasc Dis 2012; 6(4):163-74.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="31"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-31">31</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Waters DD, Guyton JR, Herrington DM, McGowan MP, Wenger NK, Shear C.  </b>TNT Steering Committee Members and Investigators. Treating to New Targets  (TNT) Study. Does Lowering low-density lipoprotein cholesterol levels below  currently recommended guidelines yield incremental clinical benefit? Am  J Cardiol 2004; 93(2):154-8.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="32"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-32">32</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Pedersen TR, Faergeman O, Kastelein JJ, Olsson AG, Tikkanen MJ, Holme  I, et al.</b> High-dose atorvastatin vs usual-dose simvastatin for secondary  prevention after myocardial infarction: the IDEAL study: a randomized controlled  trial. JAMA 2005; 294(19):2437-45.    &nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"><a name="33"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-33">33</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Baigent C, Blackwell L, Emberson J, Holland LE, Reith C, Bhala N, et  al.</b> Efficacy and safety of more intensive lowering of LDLcholesterol: a  meta-analysis of data from 170 000 participants in 26 randomised trials.  Cholesterol Treatment Trialists&rsquo; (CTT) Collaboration. Lancet 2010; 376:  1670&ndash;81.&nbsp; </font></p>           <p align="left"><font face="Verdana" size="2"><a name="34"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-34">34</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Mills EJ, O&rsquo;Regan C, Eyawo O, Wu P, Mills F, Berwanger O, et al.</b> Intensive  statin therapy compared with moderate dosing for prevention of cardiovascular  events: a meta-analysis of &gt;40 000 patients. Eur Heart Journal 2011; 32(11):1409-15.&nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="35"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-35">35</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Kashani A, Phillips CO, Foody JM, Wang Y, Mangalmurti S, Ko DT, et al.</b>  Risks associated with statin therapy: a systematic overview of randomized  clinical trials. Circulation 2006; 114(25): 2788-97.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="36"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-36">36</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Bjornsson E, Jacobson EI J, Kalaitzakis E. </b>Hepatotoxicity associated  with statins: reports of idiosyncratic liver injury post-marketing. J Hepatol  2012; 56(2):374-80.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="37"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-37">37</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Mancini JB, Baker S, Bergeron J, Fitchett D, Frohlich J, Genest J, et  al. </b>Diagnosis, Prevention, and Management of Statin Adverse Effects and  Intolerance: Proceedings of a Canadian Working Group Consensus Conference.  Can J Cardiol 2011; 27 (5): 635-62.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="38"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-38">38</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Mansi I, Frei CR, Pugh MJ, Makris U, Mortensen E. </b>Statins and musculoskeletal  Conditions, Arthtropathies, and injuries. JAMA Intern Med 2013;173(14):1-10.  doi:10.1001/jamainternmed.2013 .6184.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="39"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-39">39</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Silva M, Mattheus ML, Jarvis C, Nolan NM, Belliveau P, Malloy M, et  al.</b> Meta-Analysis of drug induced advers events associated with intensive-  dose statins therapy. Clin Ther 2007; 29(2):253-60.    &nbsp; </font></p>           ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="40"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-40">40</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Sattar N, Preiss D, Murray HM, Welsh P, Buckley BM, de Craen AJ, et  al.</b> Statins and risk of incident diabetes: a collaborative meta-analysis  of randomized statin trials. Lancet 2010; 375(9716): 735-42.    &nbsp; </font></p>           <!-- ref --><p align="left"><font face="Verdana" size="2"><a name="41"></a> </font><font color="#1f1a17" face="Verdana" size="2"> <a href="#-41">41</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Preiss D, Seshasai SR, MacFadyen JG, Murphy SA, Ho JE, Waters DD, et  al.</b> Risk of incident diabetes with intensive dose compared with moderate  dose statin therapy: a meta-analysis. 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