<?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>S1688-04202013000200013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cardiopatías congénitas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burch]]></surname>
<given-names><![CDATA[Michael]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dedieu]]></surname>
<given-names><![CDATA[Nathalie]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Great Ormond Street Hospital  ]]></institution>
<addr-line><![CDATA[Londres R.U]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Royal Brompton Hospital Departamento de Cardiología Pediátrica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2013</year>
</pub-date>
<volume>28</volume>
<numero>2</numero>
<fpage>235</fpage>
<lpage>246</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202013000200013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202013000200013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202013000200013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este Almanac destaca algunos trabajos recientes sobre cardiopatías congénitas publicados en las principales revistas de cardiología, citando más de 100 artículos. Se dividen los temas bajo subtítulos que agrupan los trabajos pertinentes, permitiendo al lector concentrarse en sus áreas de interés, pero no se pretende incluir la totalidad de los aspectos de las cardiopatías congénitas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary This Almanac highlights recent papers on congenital heart disease in the major cardiac journals. Over 100 articles are cited. Subheadings are used to group relevant papers and allow readers to focus on their areas of interest, but are not meant to be comprehensive for all aspects of congenital cardiac disease]]></p></abstract>
</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 seleccionado&nbsp;</b></font></p>        <p align="left"><b><font face="Verdana" size="4"> Almanac 2012. Las revistas de las sociedades europeas presentan una selecci&oacute;n  de la investigaci&oacute;n que ha llevado a avances recientes en la cardiolog&iacute;a  cl&iacute;nica&nbsp; </font></b></p>        <p align="left"><font face="Verdana" size="2"> Cardiopat&iacute;as cong&eacute;nitas&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Michael Burch<sup>1</sup>,</font><font face="Verdana" size="2"><sup> </sup>Nathalie Dedieu<sup>2    <br>    </sup>Este art&iacute;culo fue publicado en Heart 2012;  Published Online First: 2 September 2012 doi:10.1136/heartjnl-2011-301538,  y es reproducido y traducido con autorizaci&oacute;n.<sup>&nbsp;</sup> </font> <font face="Verdana"><font size="2">    <br>    </font>    <basefont size="3"> </font> </p>        <p align="left"><font face="Verdana" size="2"> 1. Great Ormond Street Hospital, Londres, R.U.    <br>      2. Departamento de Cardiolog&iacute;a   Pedi&aacute;trica, Royal Brompton Hospital, Londres, R.U.    <br>      Correspondencia: Dr Michael   Burch, Great Ormond Street Hospital, London WC1N 3JH, UK; </font> <font color="#1f1a17" face="Verdana" size="2"> <a href="burchm@gosh.nhs.uk">burchm@gosh.nhs.uk</a></font><font face="Verdana" size="2">    ]]></body>
<body><![CDATA[<br>      Recibido   el 21 de mayo de 2012; Aceptado el 29 de mayo de 2012.    <br>      Traducci&oacute;n: Dra.   Trinidad Ott&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> <b>Resumen&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Este Almanac destaca algunos trabajos recientes sobre cardiopat&iacute;as cong&eacute;nitas  publicados en las principales revistas de cardiolog&iacute;a, citando m&aacute;s de 100  art&iacute;culos. Se dividen los temas bajo subt&iacute;tulos que agrupan los trabajos  pertinentes, permitiendo al lector concentrarse en sus &aacute;reas de inter&eacute;s,  pero no se pretende incluir la totalidad de los aspectos de las cardiopat&iacute;as  cong&eacute;nitas.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2">     <br>    </font></p>   <font face="Verdana" size="2">       <br>       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Summary&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> This Almanac highlights recent papers on congenital heart disease in the  major cardiac journals. Over 100 articles are cited. Subheadings are used  to group relevant papers and allow readers to focus on their areas of interest,  but are not meant to be comprehensive for all aspects of congenital cardiac  disease.&nbsp; </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2">     <br>    </font></p>        <p align="left"><font face="Verdana" size="2">     <br>    </font></p>   <font face="Verdana" size="2">       <br>       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Epidemiolog&iacute;a&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Dos trabajos importantes recientes presentan la prevalencia de las cardiopat&iacute;as  cong&eacute;nitas en Europa. La informaci&oacute;n que surge de una base de datos central  alimentada por 29 registros poblacionales en 16 pa&iacute;ses mostr&oacute; una prevalencia  total de 8 por 1.000</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#1">1</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2">.<a name="-1"></a> La tasa de detecci&oacute;n global prenatal de cardiopat&iacute;as  cong&eacute;nitas no cromos&oacute;micas fue de tan solo 20%, si bien 40% de los casos  severos fueron diagnosticados antes del nacimiento. Se estima que en la  Uni&oacute;n Europea nacen vivos anualmente 36.000 ni&ntilde;os con alguna cardiopat&iacute;a  cong&eacute;nita; adem&aacute;s, se estima que hay 3.000 casos en los que se diagnostica  alguna cardiopat&iacute;a cong&eacute;nita, pero el feto muere por interrupci&oacute;n del embarazo  debido a sus anomal&iacute;as fetales. En un examen sistem&aacute;tico</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#2">2</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"> <a name="-2"></a>de 114 trabajos  y 24.091.867 nacidos vivos, la prevalencia de las cardiopat&iacute;as cong&eacute;nitas  fue aumentando con el tiempo desde 0,6/1.000 en 1930 a 9,1/1.000 despu&eacute;s  de 1995. En los &uacute;ltimos 15 a&ntilde;os, la tasa se ha estabilizado, pero implica  que cada a&ntilde;o nace 1.35 millones de ni&ntilde;os con alguna cardiopat&iacute;a cong&eacute;nita.  La prevalencia fue m&aacute;s elevada en Europa que en Am&eacute;rica del Norte.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Seg&uacute;n surge del Registro de Malformaciones Cong&eacute;nitas de Par&iacute;s<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#3"><font face="Verdana"><sup>3</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-3"></a>, se ha  observado un aumento del riesgo de cardiopat&iacute;a cong&eacute;nita cuando se usan  t&eacute;cnicas de reproducci&oacute;n asistida. El aumento del riesgo vari&oacute; seg&uacute;n la  t&eacute;cnica de reproducci&oacute;n asistida y el tipo de anomal&iacute;a card&iacute;aca. Los autores  especulan que esto puede ser debido o bien a la tecnolog&iacute;a reproductiva,  o a la causa de base de la infertilidad de la pareja.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Gen&eacute;tica&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Tres cuartos de los pacientes con el s&iacute;ndrome de deleci&oacute;n 22q11.2 (SD22q11.2)  presentan una cardiopat&iacute;a cong&eacute;nita, y si bien hoy en d&iacute;a es habitual buscar  la deleci&oacute;n 22q11.2 en todos los portadores de lesiones card&iacute;acas t&iacute;picas,  hay muchos pacientes adultos que no han sido estudiados. Se examin&oacute; una  poblaci&oacute;n adulta de 479 pacientes con lesiones t&iacute;picas (tetralog&iacute;a de Fallot  y atresia pulmonar y comunicaci&oacute;n interventricular)<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#4"><font face="Verdana"><sup>4</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-4"></a> En 20 de esos pacientes  el diagn&oacute;stico de SD22q11.2 ya era conocido, pero en otros 24 pacientes  se detect&oacute; una microdeleci&oacute;n. Los autores consideran que como el s&iacute;ndrome  tiene importantes implicaciones cl&iacute;nicas y reproductivas, habr&iacute;a que considerar  la realizaci&oacute;n de estudios gen&eacute;ticos en todos los pacientes adultos con  tetralog&iacute;a de Fallot y atresia pulmonar con comunicaci&oacute;n interventricular.&nbsp; </font></p>         <p>&nbsp;</p>    <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> La tetralog&iacute;a de Fallot es com&uacute;n en individuos que presentan deleciones  hemicigotas del cromosoma 22q11.2 que remueve el factor de transcripci&oacute;n  card&iacute;aca TBX1. Se secuenciaron los exones TBX1 en 93 pacientes con tetralog&iacute;a  no sindr&oacute;mica<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#5"><font face="Verdana"><sup>5</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-5"></a> Se realiz&oacute; el an&aacute;lisis de polimorfismos de un solo nucle&oacute;tido  en 356 pacientes con tetralog&iacute;a, en sus padres y en testigos sanos. Se  identificaron tres nuevas variantes no presentes en 1.000 cromosomas de  controles sanos de etnias apareadas. Este estudio demostr&oacute; la presencia  de variantes raras de TBX1 que tienen consecuencias funcionales en una  peque&ntilde;a proporci&oacute;n de pacientes con una tetralog&iacute;a no sindr&oacute;mica. Caleshu  y colaboradores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#6"><font face="Verdana"><sup>6</sup></font></a></font><font face="Verdana" size="2"><sup>)<a name="-6"></a> </sup>estudiaron el asunto espinoso del uso y la interpretaci&oacute;n  de las pruebas gen&eacute;ticas.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> En un estudio de siete familias se logr&oacute; demostrar que la transposici&oacute;n  familiar de las grandes arterias es provocada por m&uacute;ltiples mutaciones  en los genes de lateralidad<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#7"><font face="Verdana"><sup>7</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-7"></a>. Esto demuestra que algunos casos de transposici&oacute;n  familiar son debidos a mutaciones en los genes de lateralidad, y por lo  tanto son parte del mismo espectro nosol&oacute;gico que el s&iacute;ndrome de heterotaxia,  siendo un argumento a favor de una herencia oligog&eacute;nica o compleja en estas  genealog&iacute;as. La editorial de Keavney<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#8"><font face="Verdana"><sup>8</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-8"></a> considera que se trata de un importante  avance en nuestra comprensi&oacute;n de la transposici&oacute;n. Se sabe que la homociste&iacute;na  es un factor de riesgo independiente de cardiopat&iacute;a cong&eacute;nita, y cabe esperar  que las anomal&iacute;as gen&eacute;ticas que afectan a la homociste&iacute;na incidan en los  problemas cong&eacute;nitos card&iacute;acos. Esto qued&oacute; demostrado al observar que una  variante funcional en el intron-1 de la metionina sintasa reductasa aumentaba  el riesgo de cardiopat&iacute;a cong&eacute;nita en la poblaci&oacute;n Han china<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#9"><font face="Verdana"><sup>9</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-9"></a>&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Cardiolog&iacute;a fetal&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> La cardiolog&iacute;a fetal sigue siendo una piedra angular del coraz&oacute;n cong&eacute;nito.  El trabajo de Marek y colaboradores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#10"><font face="Verdana"><sup>10)</sup></font></a></font><font face="Verdana" size="2"><a name="-10"></a> ofrece una rese&ntilde;a &uacute;nica del diagn&oacute;stico  prenatal en la Rep&uacute;blica Checa; gracias a una estricta organizaci&oacute;n de  los servicios de salud, en el curso de dos d&eacute;cadas han logrado desarrollar  un registro nacional muy completo. Ha habido algunos &eacute;xitos particulares  y en los &uacute;ltimos a&ntilde;os el diagn&oacute;stico prenatal del coraz&oacute;n izquierdo hipopl&aacute;sico  alcanz&oacute; 95,8%, al tanto que la transposici&oacute;n se diagnostic&oacute; en solo 25,6%  de los casos.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> La cuesti&oacute;n de si el desarrollo de las c&aacute;maras card&iacute;acas <i>in utero</i> depende  del flujo es debatida, pero un trabajo muy elegante de Stressig y colaboradores  de Bonn<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#11"><font face="Verdana"><sup>11</sup></font></a></font><font face="Verdana" size="2"><sup><a name="-11"></a>)</sup> demostr&oacute; que el flujo preferencial al coraz&oacute;n derecho en casos  de hernia diafragm&aacute;tica tiene un efecto delet&eacute;reo sobre el desarrollo del  coraz&oacute;n izquierdo.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> En un estudio europeo retrospectivo se hizo una revisi&oacute;n de 175 casos de  bloqueo aur&iacute;culoventricular fetal aislado<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#12"><font face="Verdana"><sup>12</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-12"></a>. Los factores de riesgo para  una mala evoluci&oacute;n fueron una gestaci&oacute;n &lt;20 semanas, frecuencia ventricular  &lt;50/min, hidrops fetal y alteraci&oacute;n de la funci&oacute;n ventricular. No se observ&oacute;  ning&uacute;n efecto significativo de la corticoterapia. En un estudio multic&eacute;ntrico  franc&eacute;s<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#13"><font face="Verdana"><sup>13</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-13"></a>, se hizo un seguimiento a largo plazo de 141 pacientes con  bloqueo aur&iacute;culoventricular no inmune, diagnosticados en &uacute;tero o hasta  los 15 a&ntilde;os de edad, arrojando resultados sorprendentemente buenos, sin  constatarse muertes ni miocardiopat&iacute;as dilatadas luego de una media de  seguimiento de 11,6 &plusmn; 6,7 a&ntilde;os.&nbsp; </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> El bloqueo aur&iacute;culo ventricular puede reflejar exposici&oacute;n prenatal a anticuerpos  maternos anti-SSA/Ro y la alta mortalidad del lupus card&iacute;aco neonatal ha  quedado demostrada<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#14"><font face="Verdana"><sup>14</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-14"></a>. En un estudio multic&eacute;ntrico aleatorizado de 20  fetos expuestos a anticuerpos maternos de lupus<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#15"><font face="Verdana"><sup>15</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-15"></a>se encontr&oacute; que el  tratamiento con gammaglobulina intravenosa y corticoides podr&iacute;a mejorar  el resultado de estos ni&ntilde;os, con supervivencias mejores que las esperadas.  Sin embargo, un estudio prospectivo de 165 fetos con exposici&oacute;n al anticuerpo  anti-Ro/La hall&oacute; que la prolongaci&oacute;n aur&iacute;culoventricular fetal no predec&iacute;a  la progresi&oacute;n del bloqueo card&iacute;aco, por lo que se cuestion&oacute; la estrategia  de identificar y tratar la prolongaci&oacute;n aur&iacute;culoventricular en el feto<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#16"><font face="Verdana"><sup>16</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-16"></a>&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> El tratamiento m&eacute;dico transplacentario para las taquiarritmias fetales  fue examinado en un estudio multic&eacute;ntrico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#17"><font face="Verdana"><sup>17</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-17"></a> que mostr&oacute; la superioridad  de la flecainida y la digoxina; sin embargo, el hecho de no ser aleatorizado  debilitaba el estudio.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Miocardiopat&iacute;a, insuficiencia card&iacute;aca     <br>    y trasplante&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> El cribado preparticipaci&oacute;n en busca de miocardiopat&iacute;as est&aacute; atrayendo  m&aacute;s atenci&oacute;n en los medios. Un estudio italiano sobre el valor de la pesquisa  de ni&ntilde;os con ECG previo a la participaci&oacute;n demostr&oacute; que la persistencia  postpubertal de la inversi&oacute;n de la onda T se asociaba con un aumento del  riesgo de miocardiopat&iacute;a<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#18"><font face="Verdana"><sup>18</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-18"></a>.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> La oportunidad del trasplante sigue siendo una decisi&oacute;n dif&iacute;cil en los  pacientes ambulatorios. Se examin&oacute; el riesgo de muerte y de trasplante  en la miocardiopat&iacute;a dilatada infantil en una base de datos multic&eacute;ntrica;  los autores mostraron que el aumento de las dimensiones telediast&oacute;licas  del ventr&iacute;culo izquierdo se asociaba a un aumento del riesgo de trasplante,  pero no de muerte<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#19"><font face="Verdana"><sup>19</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-19"></a>. El trabajo de Giardini y colaboradores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#20"><font face="Verdana"><sup>20</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-20"></a>ha demostrado  que el estudio de ejercicio metab&oacute;lico es &uacute;til para predecir el pron&oacute;stico,  pero los porcentajes de los valores predichos son mejores que las cifras  absolutas. Aunque en general se considera que el trasplante por cardiopat&iacute;a  cong&eacute;nita entra&ntilde;a un mayor riesgo, en una peque&ntilde;a serie brit&aacute;nica de trasplante  en casos de patolog&iacute;a cong&eacute;nita en adultos se observan resultados alentadores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#21"><font face="Verdana"><sup>21</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-21"></a>.  Una revisi&oacute;n de una base de datos americana de m&aacute;s de mil trasplantes en  adultos por cardiopat&iacute;as cong&eacute;nitas confirm&oacute; una elevada mortalidad a los  30 d&iacute;as, pero una mejor supervivencia tard&iacute;a despu&eacute;s del trasplante. Si  bien los trasplantes card&iacute;acos siguen siendo un recurso precioso, actualmente  los resultados justifican la continua expansi&oacute;n de los programas de transplante  en adultos con cardiopat&iacute;as cong&eacute;nitas.&nbsp; </font></p>         <p><font face="Verdana" size="2">&nbsp; </font> </p>      <p align="left"><font face="Verdana" size="2"> Una base de datos internacional mostr&oacute; que la oxigenaci&oacute;n por membrana  extracorp&oacute;rea no parece ser un soporte circulatorio confiable para el largo  plazo en los ni&ntilde;os que esperan un trasplante card&iacute;aco<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#23"><font face="Verdana"><sup>23</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-23"></a>.</font><font face="CentSchbook BT" size="2"><font face="Verdana"><sup> </sup></font> <font face="Verdana" size="2"> Afortunadamente,  existen otras opciones de soporte, y Stiller y colaboradores</font><font face="Verdana"><sup>(</sup></font></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#24"><font face="Verdana"><sup>24</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-24"></a> presentan  una &uacute;til rese&ntilde;a general del soporte cardiovascular mec&aacute;nico en lactantes  y ni&ntilde;os.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Ventr&iacute;culo &uacute;nico&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Los pacientes con un ventr&iacute;culo &uacute;nico siguen siendo un gran tema cuando  se define el uso de los recursos previstos para las cardiopat&iacute;as cong&eacute;nitas.  El manejo de estos pacientes es sumamente controvertido. En esta circulaci&oacute;n  compleja es frecuente utilizar inhibidores de la ECA, pero no quedan claros  los efectos de su vasodilataci&oacute;n. Trabajos en ni&ntilde;os portadores de derivaciones  cavopulmonares bidireccionales demostraron que el enalaprilat no aumenta  el gasto card&iacute;aco total pero que redistribuye el flujo al sector inferior  del cuerpo, con una disminuci&oacute;n concomitante de la saturaci&oacute;n de ox&iacute;geno  arterial<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#25"><font face="Verdana"><sup>25</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-25"></a> Los autores concluyeron que en estos pacientes es dif&iacute;cil  aumentar el gasto card&iacute;aco y que los inhibidores de la ECA deben ser usados  con cautela en quienes tienen saturaciones a&oacute;rticas de valores lim&iacute;trofes.  Este trabajo concuerda con los resultados de un ensayo multic&eacute;ntrico aleatorizado,  que hall&oacute; que la administraci&oacute;n de enalapril a lactantes con fisiolog&iacute;a  de ventr&iacute;culo &uacute;nico en el primer a&ntilde;o de vida no mejoraba el crecimiento  som&aacute;tico, la funci&oacute;n ventricular o la severidad de la insuficiencia card&iacute;aca<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#26"><font face="Verdana"><sup>26</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-26"></a>.  En un an&aacute;lisis ulterior de la poblaci&oacute;n en estudio, los autores tambi&eacute;n  han demostrado que el genotipo de renina aldosterona influye en la remodelaci&oacute;n  ventricular en lactantes con un ventr&iacute;culo &uacute;nico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#27"><font face="Verdana"><sup>27</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.&nbsp;<a name="-27"></a> </font></p>        <p align="left"><font face="Verdana" size="2"> Los resultados tard&iacute;os de la operaci&oacute;n de Fontan siguen siendo motivo de  preocupaci&oacute;n. En algunos pacientes con el tiempo se da una falla progresiva  de la circulaci&oacute;n, cuya fisiopatolog&iacute;a de base no se comprende claramente.  En una revisi&oacute;n de la evidencia disponible a la fecha de las alteraciones  de la vasculatura pulmonar en pacientes sometidos a la operaci&oacute;n de Fontan,  se analiz&oacute; el potencial de tratamientos aprobados para hipertensi&oacute;n arterial  pulmonar que podr&iacute;an resultar beneficiosos<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#28"><font face="Verdana"><sup>28</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-28"></a>. Actualmente se reconoce  que la enfermedad hep&aacute;tica es un problema grave que plantea este procedimiento  a m&aacute;s largo plazo. En una serie de pacientes sometidos a esta cirug&iacute;a fue  frecuente observar disfunci&oacute;n hep&aacute;tica y alteraciones cirr&oacute;ticas<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#29"><font face="Verdana"><sup>29</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-29"></a> Las  complicaciones hep&aacute;ticas se correlacionaron con la duraci&oacute;n de la circulaci&oacute;n  de Fontan. Los autores concluyeron que estos pacientes necesitan una evaluaci&oacute;n  peri&oacute;dica de su funci&oacute;n hep&aacute;tica; se han utilizado algunos marcadores no  invasivos de fibrosis hep&aacute;tica con efectividad. En una reuni&oacute;n de consenso  reciente sobre este problema, el grupo recomend&oacute; un protocolo de estudio  prospectivo sobre la evaluaci&oacute;n de la funci&oacute;n hep&aacute;tica 10 a&ntilde;os despu&eacute;s  de la operaci&oacute;n de Fontan<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#30"><font face="Verdana"><sup>30</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-30"></a>&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> El uso de anticoagulaci&oacute;n despu&eacute;s de una operaci&oacute;n de Fontan sigue siendo  un tema controvertido. Se han publicado los resultados de un estudio multic&eacute;ntrico  aleatorizado de warfarina o heparina despu&eacute;s de un procedimiento de Fontan.</font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#31"><font face="Verdana"><sup>31</sup></font></a></font><font face="Verdana" size="2"><a name="-31"></a>  Se aleatorizaron en total 111 pacientes. La incidencia de trombosis fue  similar en ambos grupos: 12 de 57 con aspirina y 13 de 54 en el grupo de  warfarina. Si bien no hubo diferencias, los autores concluyeron que la  tasa tan alta de trombosis justificaba considerar otros enfoques alternativos.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Otra controversia de Fontan tiene que ver con el uso de fenestraciones,  ya que si bien pueden mejorar los resultados quir&uacute;rgicos, existe inquietud  en cuanto a sus complicaciones tard&iacute;as. Los resultados tard&iacute;os de la fenestraci&oacute;n  de la v&iacute;a venosa sist&eacute;mica en el momento de la operaci&oacute;n de Fontan fueron  comunicados en un estudio multic&eacute;ntrico retrospectivo no aleatorizado<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#32"><font face="Verdana"><sup>32</sup></font></a></font><font face="Verdana" size="2"><sup><a name="-32"></a>)</sup>.  De las 361 fenestraciones, hubo pocos resultados delet&eacute;reos una media de  8&plusmn;3 a&ntilde;os siguientes a la cirug&iacute;a. Las saturaciones fueron de 89% contra  95% en el grupo fenestrado.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Imagenolog&iacute;a&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> La ecocardiograf&iacute;a tridimensional est&aacute; desarroll&aacute;ndose r&aacute;pidamente y su  aplicaci&oacute;n a la cardiopat&iacute;a cong&eacute;nita puede ser uno de sus usos clave en  los a&ntilde;os venideros<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#33"><font face="Verdana"><sup>33</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-33"></a> Entre los m&eacute;todos de estudios imagenol&oacute;gicos nuevos  se incluye una nueva t&eacute;cnica de ultrasonido de alta resoluci&oacute;n<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#34."><font face="Verdana"><sup>34</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-34"></a> Los  autores describieron la t&eacute;cnica en adolescentes que hab&iacute;an sido sometidos  a reparaci&oacute;n de una coartaci&oacute;n en su infancia, y demostraron aumento del  espesor de la &iacute;ntima media de la arteria preductal, de la masa del ventr&iacute;culo  izquierdo y rigidez de la aorta ascendente en adolescentes. Se interpret&oacute;  que las anomal&iacute;as cardiovasculares m&aacute;s avanzadas luego del implante de  una pr&oacute;tesis para corregir la coartaci&oacute;n estaban relacionadas con el hecho  que los pacientes eran de mayor edad en el momento de la intervenci&oacute;n.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>     </font>         <p>  <multicol gutter="18" cols="2"></multicol> </p>       ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Cirug&iacute;a&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Se consult&oacute; el registro holand&eacute;s Congenital Corvitia (CONCOR)<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#35"><font face="Verdana"><sup>35</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-35"></a>para  examinar los resultados de la cirug&iacute;a predominantemente en adultos j&oacute;venes  con cardiopat&iacute;a cong&eacute;nita. Un quinto de ellos precis&oacute; cirug&iacute;a cardiovascular  en el transcurso de un per&iacute;odo de 15 a&ntilde;os, y en 40% el procedimiento que  se realiz&oacute; fue una reoperaci&oacute;n. Los hombres con cardiopat&iacute;a cong&eacute;nita tuvieron  m&aacute;s probabilidades de someterse a cirug&iacute;a en la edad adulta y tuvieron  una supervivencia a largo plazo consistentemente peor que las mujeres luego  de las reoperaciones en la edad adulta.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Se hizo un estudio pormenorizado de los resultados funcionales a los 8,1  a&ntilde;os (rango entre 2,0 y 14,0) de 45 sujetos en quienes se hab&iacute;a practicado  el procedimiento de Ross, (con una edad promedio de 24,6 a&ntilde;os, rango entre  16,9 y 52,2 a&ntilde;os) operados entre 1994 y 2006. Para su valoraci&oacute;n se utilizaron  resonancia magn&eacute;tica cardiovascular, ecocardiograf&iacute;a y pruebas de ejercicio  cardiopulmonar<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#36"><font face="Verdana"><sup>36</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-36"></a>. Los autores demostraron una leve disfunci&oacute;n del autoinjerto  y del homoinjerto en la mayor&iacute;a de los pacientes tras el procedimiento  de Ross, con buena funci&oacute;n ventricular y buena capacidad para el ejercicio.  En un estudio se compar&oacute; la supervivencia tard&iacute;a de 918 pacientes sometidos  al procedimiento de Ross y 406 pacientes a los que se les colocaron v&aacute;lvulas  mec&aacute;nicas entre 18 y 60 a&ntilde;os de edad que sobrevivieron un procedimiento  electivo (1994-2008). Se hizo una comparaci&oacute;n de la supervivencia tard&iacute;a  entre los dos grupos utilizando emparejamiento por el &iacute;ndice de propensi&oacute;n<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#37"><font face="Verdana"><sup>37</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-37"></a>.  En pacientes comparables, no hubo diferencia en la supervivencia tard&iacute;a  en la primera d&eacute;cada siguiente a la operaci&oacute;n entre el procedimiento de  Ross y la implantaci&oacute;n de una v&aacute;lvula a&oacute;rtica mec&aacute;nica con manejo &oacute;ptimo  de la coagulaci&oacute;n por el paciente mismo. Los autores demostraron que la  supervivencia en estos pacientes adultos j&oacute;venes seleccionados era excelente,  tal vez como resultado de un auto manejo de la coagulaci&oacute;n altamente especializado,  y porque en los &uacute;ltimos a&ntilde;os se ha mejorado la elecci&oacute;n de la oportunidad  quir&uacute;rgica y la selecci&oacute;n de los pacientes. A pesar del advenimiento de  la operaci&oacute;n de Ross, la cirug&iacute;a de la v&aacute;lvula a&oacute;rtica en ni&ntilde;os sigue siendo  un &aacute;rea compleja y dif&iacute;cil; d&rsquo;Udekem presenta una rese&ntilde;a general muy &uacute;til  al respecto<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#38"><font face="Verdana"><sup>38</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-38"></a>&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> En un informe sobre el riesgo que plantea la cirug&iacute;a en cuando al desarrollo  neurol&oacute;gico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#39."><font face="Verdana"><sup>39</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-39"></a>, se hizo una revisi&oacute;n de las valoraciones neuropsicol&oacute;gicas  y de las im&aacute;genes estructurales del enc&eacute;falo de sujetos de 16 a&ntilde;os de edad  con transposici&oacute;n de las grandes arterias, sometidos a la operaci&oacute;n de  switch arterial cuando eran lactantes. Los sujetos fueron asignados aleatoriamente  a paro circulatorio total o circulaci&oacute;n extracorporea continua con flujo  bajo, pero se encontraron pocas diferencias de importancia entre ambos  grupos de tratamiento. No obstante ello, los adolescentes con transposici&oacute;n  de las grandes arterias sometidos a la operaci&oacute;n de switch arterial presentan  un mayor riesgo en cuanto al desarrollo neurol&oacute;gico. Los autores consideran  que los ni&ntilde;os con cardiopat&iacute;a cong&eacute;nita pueden beneficiarse de una vigilancia  continua, para identificar la aparici&oacute;n de dificultades.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Tetralog&iacute;a de Fallot&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Un estudio basado en datos de <i>speckle tracking</i> en pacientes con tetralog&iacute;a  de Fallot corregida demostr&oacute; que se retrasa la deformaci&oacute;n del tracto de  salida del ventr&iacute;culo derecho, lo que reduce la demora del tiempo ventricular  derecho, lo que tiene una importante relaci&oacute;n con la alteraci&oacute;n del funcionamiento  del ventr&iacute;culo derecho<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#40"><font face="Verdana"><sup>40</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-40"></a>. La falla tard&iacute;a del coraz&oacute;n derecho es un problema  grave en la tetralog&iacute;a y la transposici&oacute;n corregida cong&eacute;nitamente. En  un estudio de 40 pacientes de ese tipo, con ecograf&iacute;a de contraste del  miocardio se encontr&oacute; que se reduc&iacute;a la densidad microvascular del miocardio  mural del tabique del ventr&iacute;culo derecho en pacientes con hipertrofia debida  a sobrecarga de presi&oacute;n y/o volumen. Los autores consideraron que esto  tal vez estuviera relacionado a una menor reserva de perfusi&oacute;n mioc&aacute;rdica  y un deterioro de la funci&oacute;n del ventr&iacute;culo derecho<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#41"><font face="Verdana"><sup>41</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-41"></a> Un informe sobre  el impacto de la fisiolog&iacute;a restrictiva de la funci&oacute;n del ventr&iacute;culo derecho  tras la reparaci&oacute;n de la tetralog&iacute;a describe un aumento de la rigidez del  ventr&iacute;culo derecho en di&aacute;stole<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#42"><font face="Verdana"><sup>42</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-42"></a>. Sin embargo, la respuesta lusitr&oacute;pica  a los agentes beta adren&eacute;rgicos fue anormal independientemente de la fisiolog&iacute;a  restrictiva. En una investigaci&oacute;n de 29 ni&ntilde;os asintom&aacute;ticos con tetralog&iacute;a  reparada<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#43"><font face="Verdana"><sup>43</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>,<a name="-43"></a> a pesar de una dilataci&oacute;n moderada del ventr&iacute;culo derecho  y bloqueo de rama derecha comparado con controles, los autores demostraron  que no aparec&iacute;a disincron&iacute;a ventricular derecha ni izquierda en reposo,  sino disincron&iacute;a mec&aacute;nica inducida por el ejercicio. Esto no estuvo relacionado  con la duraci&oacute;n del QRS, el volumen y la funci&oacute;n ventricular, o el consumo  pico de ox&iacute;geno. En un estudio de tetralog&iacute;a reparada en adultos, la disfunci&oacute;n  longitudinal del ventr&iacute;culo izquierdo se acompa&ntilde;&oacute; de mayor riesgo de muerte  s&uacute;bita card&iacute;aca o de arritmias que amenazan la vida<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#44"><font face="Verdana"><sup>44</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-44"></a>. Los autores concluyen  que en combinaci&oacute;n con las variables ecocardiogr&aacute;ficas del coraz&oacute;n derecho,  estas medidas dan informaci&oacute;n sobre los resultados que resultan importante  para estimar el pron&oacute;stico.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>     </font>         <p>&nbsp;</p>    <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> <b>Hipertensi&oacute;n pulmonar&nbsp;</b> </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> En un estudio abierto prospectivo sobre el uso de sildenafil en 84 pacientes  se presenta m&aacute;s evidencia de los beneficios de los vasodilatadores pulmonares  en el s&iacute;ndrome de Eisenmenger<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#45"><font face="Verdana"><sup>45</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-45"></a> Tras doce meses de tratamiento, los  sujetos con s&iacute;ndrome de Eisenmenger presentaron una buena tolerancia al  sildenafil por v&iacute;a oral, y pareci&oacute; que mejoraba la capacidad de ejercicio,  saturaci&oacute;n de ox&iacute;geno arterial sist&eacute;mica y los par&aacute;metros hemodin&aacute;micos.  Se describe la importancia de la reactividad vascular pulmonar como predictor  independiente del desenlace en 38 pacientes con el s&iacute;ndrome de Eisenmenger  que recib&iacute;an bosentan<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#46"><font face="Verdana"><sup>46</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.&nbsp;<a name="-46"></a> </font></p>        <p align="left"><font face="Verdana" size="2"> En el Reino Unido (RU) se comunic&oacute; una cohorte nacional &uacute;nica de pacientes  de hipertensi&oacute;n pulmonar en la infancia<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#47"><font face="Verdana"><sup>47</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-47"></a>. Por primera vez, los autores  demostraron que la incidencia de hipertensi&oacute;n pulmonar es menor en los  ni&ntilde;os que en los adultos, y que las caracter&iacute;sticas cl&iacute;nicas pueden diferir.  La mayor&iacute;a de los ni&ntilde;os se presenta con evidencia cl&iacute;nica de enfermedad  avanzada, y el estado cl&iacute;nico en el momento de presentaci&oacute;n es predictivo  del desenlace. Esta experiencia de 7 a&ntilde;os confirm&oacute; la mejora significativa  de la supervivencia con respecto a los controles hist&oacute;ricos. El mismo grupo  tambi&eacute;n comunic&oacute; un nuevo enfoque de TC al pron&oacute;stico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#48"><font face="Verdana"><sup>48</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-48"></a> Encontraron  que la ramificaci&oacute;n fractal cuantifica las alteraciones vasculares y predice  la supervivencia en la hipertensi&oacute;n pulmonar. La necesidad de desarrollar  medicaci&oacute;n para la edad pedi&aacute;trica para el manejo de la hipertensi&oacute;n pulmonar  fue destacada ya por Barst</font><font face="CentSchbook BT" size="2"><font face="Verdana"><sup>(49)</sup></font><font face="Verdana" size="2"><a name="-49"></a>. Un estudio de pacientes con el s&iacute;ndrome  de Eisenmenger (n=181, edad 36,9 &plusmn; 12,1 a&ntilde;os, 31% con s&iacute;ndrome de Down),  en quienes se midieron las concentraciones del p&eacute;ptido natriur&eacute;tico tipo  B (BNP, por sus siglas en ingl&eacute;s) como parte de los cuidados cl&iacute;nicos de  rutina, hallaron que esas concentraciones predec&iacute;an los resultados</font><font face="Verdana"><sup>(</sup></font></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#50"><font face="Verdana"><sup>50</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-50"></a>  Adem&aacute;s, los autores especulan que los tratamientos dirigidos selectivamente  a una enfermedad pueden ayudar a reducir las concentraciones de BNP en  esta poblaci&oacute;n, mientras que los pacientes v&iacute;rgenes de tratamiento tienen  concentraciones de BNP est&aacute;ticas o en alza. Este tema est&aacute; analizado en  m&aacute;s detalle en una editorial de D&rsquo;Alto.<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#51"><font face="Verdana"><sup>51</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>&nbsp;<a name="-51"></a> </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Anomal&iacute;as arteriales en las cardiopat&iacute;as cong&eacute;nitas&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Si bien ya se han descrito anomal&iacute;as de las paredes a&oacute;rticas en los trastornos  hereditarios del tejido conectivo como el s&iacute;ndrome de Marfan y la valvulopat&iacute;a  a&oacute;rtica bicusp&iacute;dea<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#52"><font face="Verdana"><sup>52</sup></font></a></font><font face="Verdana" size="2"><sup>,</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#53"><font face="Verdana"><sup>53</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>,<a name="-52"></a><a name="-53"></a> hay informes recientes que indican un compromiso  a&oacute;rtico similar en entidades cl&aacute;sicas de cardiopat&iacute;as cong&eacute;nitas del tipo  de la coartaci&oacute;n a&oacute;rtica, la tetralog&iacute;a de Fallot y la transposici&oacute;n de  las grandes arterias; la RMN es crucial para la definici&oacute;n del problema<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#54"><font face="Verdana"><sup>54</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-54"></a>.  La dilataci&oacute;n de la arteria pulmonar se observa cuando hay anomal&iacute;as de  la v&aacute;lvula pulmonar y con enfermedades del tejido conectivo, pero tambi&eacute;n  en asociaci&oacute;n con v&aacute;lvula a&oacute;rtica bicusp&iacute;dea, en ausencia de anomal&iacute;as  de la v&aacute;lvula pulmonar, sugiriendo una patolog&iacute;a primaria de la pared vascular  que predispone a la dilataci&oacute;n arterial</font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#55"><font face="Verdana"><sup>(55</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-55"></a>.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Intervenci&oacute;n con cateterismo&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Con el uso creciente de los procedimientos de cardiolog&iacute;a intervencionista  en los j&oacute;venes, queda clara la importancia de tener en cuenta la exposici&oacute;n  a la radiaci&oacute;n. Informaci&oacute;n proveniente de Italia plantea la inquietud  de que los ni&ntilde;os portadores de cardiopat&iacute;as cong&eacute;nitas se ven expuestos  a una importante dosis acumulada de radiaci&oacute;n</font><sup><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"><a name="-56"></a>. Hay estimaciones indirectas  del riesgo de presentar c&aacute;ncer y estudios de ADN que muestran que los ni&ntilde;os  con cardiopat&iacute;a cong&eacute;nita son expuestos a importantes dosis de radiaci&oacute;n,  y se enfatiza la necesidad de una estricta optimizaci&oacute;n de las dosis radiantes  en los ni&ntilde;os. La editorial de Hoffmann y Bremerich ahonda en los riesgos  que entra&ntilde;a la radiaci&oacute;n en esos pacientes</font><sup><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">.<a name="-57"></a>&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Las t&eacute;cnicas de cateterismo siguen avanzando. Un ensayo de exenci&oacute;n de  investigaci&oacute;n de dispositivos prospectivo, aleatorizado y multic&eacute;ntrico,  realizado en los Estados Unidos compar&oacute; el uso de <i>cutting balloons</i> con  globos de alta presi&oacute;n en el tratamiento de la estenosis de la arteria  pulmonar. Los autores hallaron una mayor eficacia para los <i>cutting balloons</i>  y un perfil de seguridad similar</font><sup><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></sup><font face="Verdana" size="2">.<a name="-58"></a> Informaci&oacute;n proveniente de un &uacute;nico  centro</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"><a name="-59"></a> del R.U. con m&aacute;s de 100 procedimientos de colocaci&oacute;n de pr&oacute;tesis  para tratamiento de coartaci&oacute;n demuestra que la colocaci&oacute;n de pr&oacute;tesis  para coartaci&oacute;n y recoartaci&oacute;n a&oacute;rtica es efectiva, con bajas tasas de  complicaciones inmediatas. Con las pr&oacute;tesis de &uacute;ltima generaci&oacute;n no se  observaron fracturas de las pr&oacute;tesis y los aneurismas posteriores al procedimiento  fueron raros. No queda claro cu&aacute;l ser&iacute;a el m&eacute;todo &oacute;ptimo de seguimiento  de estos pacientes, pero se considera que son &uacute;tiles tanto la tomograf&iacute;a  computarizada como la RMN</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">.<a name="-60"></a> Un estudio multic&eacute;ntrico de observaci&oacute;n  de los EE.UU. aporta datos de 350 ni&ntilde;os con coartaci&oacute;n nativa &gt;10 kg</font><sup><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">.<a name="-61"></a>  Se incluyeron 217 <i>stents</i>, 61 angioplastias con bal&oacute;n y 72 procedimientos  quir&uacute;rgicos. La colocaci&oacute;n de <i>stents</i> y la cirug&iacute;a fueron mejores que las  angioplastias con bal&oacute;n en la reducci&oacute;n del gradiente de presi&oacute;n arterial  entre los miembros superiores e inferiores en el seguimiento a corto plazo,  y tuvieron mejores resultados en la imagen integrada del arco a&oacute;rtico.  Los pacientes con <i>stents</i> fueron los que tuvieron estad&iacute;as m&aacute;s breves y  las tasas de complicaciones m&aacute;s bajas, si bien estuvieron m&aacute;s propensos  a requerir una intervenci&oacute;n programada. Los autores recomiendan cautela  en la interpretaci&oacute;n de los resultados, ya que el estudio no fue aleatorizado.  Es frecuente que haya que hacer angioplastia con bal&oacute;n para solucionar  la obstrucci&oacute;n del arco a&oacute;rtico luego del procedimiento de Norwood, y los  resultados de una revisi&oacute;n retrospectiva</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#62">62</a></font><font face="Verdana" size="2">)<a name="-62"></a></font></sup><font face="Verdana" size="2"> reflejan que solo 58% de los  sujetos a los que se les practic&oacute; una angioplastia con bal&oacute;n inicial no  hab&iacute;an sido nuevamente intervenidos por su arco a los 5 a&ntilde;os, observ&aacute;ndose  un mayor el riesgo de reintervenci&oacute;n en los sujetos menores de 3 meses  en el momento de la intervenci&oacute;n inicial y en los que tuvieron peores resultados  iniciales.&nbsp; </font></p>         <p>   <multicol gutter="18" cols="2"></multicol>    <multicol gutter="18" cols="2"></multicol></p>       ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> Roberts y colaboradores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#63"><font face="Verdana"><sup>63</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-63"></a> comunicaron una experiencia multic&eacute;ntrica exitosa  de reemplazo percut&aacute;neo de la v&aacute;lvula tricusp&iacute;dea utilizando la v&aacute;lvula  Melody en 15 pacientes. A todos los pacientes se les hab&iacute;a colocado previamente  una v&aacute;lvula bioprot&eacute;sica o un conducto, y hab&iacute;an evolucionado hacia una  importante estenosis o insuficiencia. Se comunicaron resultados alentadores  con la v&aacute;lvula transcat&eacute;ter SAPIEN&reg; de Edwards, colocada a ra&iacute;z de la falla  del conducto en la posici&oacute;n pulmonar en 36 pacientes de cuatro centros<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#64"><font face="Verdana"><sup>64</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-64"></a>  Lauten y colaboradores<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#65"><font face="Verdana"><sup>65</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-65"></a>publicaron im&aacute;genes muy ilustrativas de este  dispositivo. Se comunicaron los resultados pre-colocaci&oacute;n de <i>stents</i> al  a&ntilde;o de estar usando la v&aacute;lvula Melody en la posici&oacute;n pulmonar<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#66"><font face="Verdana"><sup>66</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-66"></a> en 65  pacientes. Los resultados hemodin&aacute;micos iniciales se manten&iacute;an un a&ntilde;o despu&eacute;s,  pero no hab&iacute;a evidencia de que continuara una remodelaci&oacute;n funcional positiva  luego de los efectos agudos inmediatos.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Las estrategias referentes a la estimulaci&oacute;n card&iacute;aca en lactantes y ni&ntilde;os  son objeto de frecuente discusi&oacute;n. Un estudio multic&eacute;ntrico reciente demostr&oacute;  que la estimulaci&oacute;n del ventr&iacute;culo izquierdo se asociaba a una mejor funci&oacute;n  sist&oacute;lica que la estimulaci&oacute;n del ventr&iacute;culo derecho<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#67"><font face="Verdana"><sup>67</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>,<a name="-67"></a> y una &uacute;til revisi&oacute;n  puso en contexto el tema de la estimulaci&oacute;n en ni&ntilde;os<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#68"><font face="Verdana"><sup>68</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-68"></a>.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Cardiopat&iacute;as cong&eacute;nitas en el adulto&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> La poblaci&oacute;n creciente de adultos con cardiopat&iacute;a cong&eacute;nita se ve reflejada  en un n&uacute;mero tambi&eacute;n crecientes de publicaciones en este campo. La nueva  carga que surge de los ingresos hospitalarios de adultos con cardiopat&iacute;as  cong&eacute;nitas fue descrita utilizando un registro nacional holand&eacute;s<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#69"><font face="Verdana"><sup>69</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-69"></a> Durante  los 28.990 a&ntilde;os-pacientes, ingresaron 2.908 pacientes (50%) al hospital.  La media de edad al ingreso fue 39 a&ntilde;os (rango: de 18 a 86 a&ntilde;os). Las tasas  de admisi&oacute;n fueron por lo menos el doble que en la poblaci&oacute;n general, siendo  m&aacute;s marcadas en los grupos de mayor edad. Los autores plantean que se tienen  que ir preparando los recursos sanitarios con tiempo, previendo la atenci&oacute;n  que demandar&aacute; esta poblaci&oacute;n al ir avanzando su edad.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Un trabajo de Toronto describe la debilidad de los m&uacute;sculos respiratorios  y esquel&eacute;ticos en adultos con cardiopat&iacute;a cong&eacute;nita, que se asemejan a  la observada en adultos de m&aacute;s edad con insuficiencia cardiaca avanzada<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#70"><font face="Verdana"><sup>70</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-70"></a>  La importancia de este cambio de enfoque en los mecanismos de reducci&oacute;n  de tolerancia al ejercicio en los casos de cardiopat&iacute;a cong&eacute;nita se analiza  en mayor detalle en la editorial de Giardini<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#71"><font face="Verdana"><sup>71</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-71"></a>. Los biomarcadores tambi&eacute;n  pueden tener un papel importante en la valoraci&oacute;n de estos pacientes. Se  investig&oacute; la relaci&oacute;n entre la funci&oacute;n sist&eacute;mica del ventr&iacute;culo derecho  con el ECG y los niveles de NT-proBNP en adultos sometidos tiempo atr&aacute;s  al procedimiento de Senning o Mustard<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#72"><font face="Verdana"><sup>72</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-72"></a>. Los niveles de NT-proBNP circulantes  y varios par&aacute;metros del ECG de superficie mostraron su utilidad como marcadores  sustitutos de funci&oacute;n sist&eacute;mica del ventr&iacute;culo derecho y agregan informaci&oacute;n  sobre el estado de la insuficiencia card&iacute;aca. Pese a que los pediatras  son muy conscientes de la asociaci&oacute;n entre el s&iacute;ndrome de Down y las cardiopat&iacute;as  cong&eacute;nitas, informaci&oacute;n que surge de los Pa&iacute;ses Bajos documentaba que 17%  de los pacientes con s&iacute;ndrome de Down institucionalizados ten&iacute;an cardiopat&iacute;as  cong&eacute;nitas no diagnosticadas. En la primera etapa de este estudio se incluyeron  31 centros y 1.158 pacientes<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#73"><font face="Verdana"><sup>73</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-73"></a>. Los autores recomiendan hacer pesquisa  cardol&oacute;gica en los pacientes de m&aacute;s edad portadores del s&iacute;ndrome de Down,  para quienes ahora se dispone de nuevas opciones terap&eacute;uticas, y para prevenci&oacute;n  de complicaciones card&iacute;acas a una edad m&aacute;s avanzada.&nbsp; </font></p>     <multicol gutter="18" cols="2"></multicol>     <p align="left"><font face="Verdana" size="2"> En un an&aacute;lisis retrospectivo de las bases de datos europea y canadiense<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#74"><font face="Verdana"><sup>74</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>  <a name="-74"></a>con un total de 23.153 pacientes, cuyas edades iban entre 16 y 91 a&ntilde;os  (media: 36,4) el accidente cerebrovascular fue una importante causa de  morbilidad en la cardiopat&iacute;a cong&eacute;nita del adulto. De esos pacientes, 458  (2,0%) presentaron uno o m&aacute;s accidentes cerebrovasculares. La prevalencia  m&aacute;s elevada fue en las lesiones cian&oacute;ticas: 50/215 (23,3%).&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> En un meta an&aacute;lisis y un examen sistem&aacute;tico del cierre de comunicaciones  interauriculares se identificaron 26 estudios que inclu&iacute;an 1.841 pacientes  sometidos a cierre quir&uacute;rgico y 945 sometidos a cierre percut&aacute;neo<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#75"><font face="Verdana"><sup>75</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-75"></a>  Utilizando un modelo de efectos aleatorios, un metaan&aacute;lisis demostr&oacute; una  reducci&oacute;n de la prevalencia de las taquiarritmias auriculares tras el cierre  de la comunicaci&oacute;n interauricular (OR=0,66 [IC 95%: 0,57 a 0,77]). Este  efecto fue demostrado tanto despu&eacute;s del cierre percut&aacute;neo como quir&uacute;rgico.  El seguimiento inmediato (&lt;30 d&iacute;as) y a mediano plazo (30 d&iacute;as a 5 a&ntilde;os)  tambi&eacute;n demostr&oacute; una reducci&oacute;n de la prevalencia de taquiarritmias auriculares.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Inuzuka y colaboradores analizaron la informaci&oacute;n de 1.375 pacientes adultos  consecutivos con cardiopat&iacute;a cong&eacute;nita (edad: 33 &plusmn; 13 a&ntilde;os) sometidos a  pruebas de ejercicio cardiopulmonar en un &uacute;nico centro en un per&iacute;odo de  10 a&ntilde;os<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#76"><font face="Verdana"><sup>76</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-76"></a> Mostraron que las pruebas de ejercicio cardiopulmonar aportan  informaci&oacute;n con fuerte importancia pron&oacute;stica en pacientes adultos con  cardiopat&iacute;a cong&eacute;nita. No obstante ello, seg&uacute;n los autores, la definici&oacute;n  del pron&oacute;stico debe abordarse de una manera diferente, dependiendo de la  presencia de cianosis, el uso de medicaci&oacute;n que reduce la frecuencia card&iacute;aca  y el nivel de ejercicio alcanzado.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> <b>Embarazo y cardiopat&iacute;a cong&eacute;nita&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> La cardiopat&iacute;a cong&eacute;nita se ha convertido en el principal factor de mortalidad  materna durante el embarazo en pa&iacute;ses desarrollados. El n&uacute;mero creciente  de mujeres portadoras de cardiopat&iacute;a cong&eacute;nita que sobrevive hasta la vida  adulta ha llevado a que la atenci&oacute;n del embarazo de este grupo de pacientes  se convirtiera en un &aacute;rea importante de la cardiolog&iacute;a obst&eacute;trica. Se ha  destacado la importancia de la atenci&oacute;n que necesita este grupo vulnerable<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#77"><font face="Verdana"><sup>77</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-77"></a>.  Se investigaron los resultados de 405 embarazos de mujeres con cardiopat&iacute;a  cong&eacute;nita y los eventos card&iacute;acos tard&iacute;os<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#78"><font face="Verdana"><sup>78</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-78"></a>. Pese a que los eventos adversos  durante el embarazo son bien conocidos, el problema de los eventos card&iacute;acos  tard&iacute;os despu&eacute;s del embarazo es menos conocido. Los autores hallaron que  hay caracter&iacute;sticas maternas previas al embarazo que pueden ayudar a identificar  a las mujeres que tienen un mayor riesgo de presentar eventos card&iacute;acos  tard&iacute;os. Los eventos card&iacute;acos adversos durante el embarazo tambi&eacute;n fueron  importantes y se asocian con un aumento del riesgo de eventos card&iacute;acos  tard&iacute;os. Opotowsky y colaboradores utilizaron el registro nacional de EE.UU.  de ingresos hospitalarios para evaluar los nacimientos anuales de mujeres  con cardiopat&iacute;a cong&eacute;nita<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#79"><font face="Verdana"><sup>79</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>.<a name="-79"></a> Estos aumentaron 34,9% de 1998 a 2007, mientras  que el aumento fue de 21,3% en la poblaci&oacute;n general. Las mujeres con cardiopat&iacute;as  cong&eacute;nitas fueron m&aacute;s propensas a sostener un evento cardiovascular (4.042/100.000  versus 278/100.000 nacimientos); la arritmia fue el evento cardiovascular  m&aacute;s com&uacute;n. La tasa de muertes fue de 150/100.000 pacientes con cardiopat&iacute;a  cong&eacute;nita, comparado con 8,2/ 100.000 pacientes sin esa patolog&iacute;a. La enfermedad  compleja aument&oacute; la probabilidad de presentar un evento cardiovascular  adverso comparado con la cardiopat&iacute;a cong&eacute;nita sencilla (8.158/100.000  versus 3.166/100.000, OR multivariable = 2,0, IC 95%: 1,4 a 3,0).&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Lui y colaboradores estudiaron la respuesta de la frecuencia card&iacute;aca durante  el ejercicio y el desenlace gestacional en mujeres con cardiopat&iacute;a cong&eacute;nita<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#80"><font face="Verdana"><sup>80</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-80"></a>.  La frecuencia card&iacute;aca pico, el porcentaje de la frecuencia card&iacute;aca m&aacute;xima  predicha para la edad y el &iacute;ndice cronotr&oacute;pico estuvieron asociados con  un evento card&iacute;aco. Se presentaron eventos neonatales en 20% de los casos.  El pico del consumo de ox&iacute;geno no se asoci&oacute; con un desenlace adverso del  embarazo. Los autores concluyeron que una respuesta cronotr&oacute;pica anormal  se correlaciona con desenlaces gestacionales adversos en mujeres portadoras  de cardiopat&iacute;as cong&eacute;nitas y se lo deber&iacute;a considerar al refinar los esquemas  de estratificaci&oacute;n del riesgo.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Carga de la enfermedad cardiovascular a nivel mundial&nbsp;</b> </font></p>        <p align="left"><font face="Verdana" size="2"> Es clara la importancia de la enfermedad cong&eacute;nita en los pa&iacute;ses en desarrollo,  ya que la gran mayor&iacute;a de pacientes nace all&iacute;. Un hallazgo preocupante  de Nueva Delhi<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#81"><font face="Verdana"><sup>81</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-81"></a> es que el g&eacute;nero femenino es un importante determinante  de no adherencia con la cirug&iacute;a card&iacute;aca pedi&aacute;trica. Su estudio prospectivo  de 405 casos inclu&iacute;a entrevistas en profundidad. Su conclusi&oacute;n fue que  hay una serie de factores sociales profundamente enraizados que constituyen  la base de este sesgo de g&eacute;nero. Daljit Singh y colegas<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#82"><font face="Verdana"><sup>82</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-82"></a> dan una interesante  rese&ntilde;a de este problema. En un pa&iacute;s desarrollado (Taiw&aacute;n) un estudio de  289 pacientes con cardiopat&iacute;a cong&eacute;nita adulta hall&oacute; que el g&eacute;nero femenino  se acompa&ntilde;aba de una mala calidad de vida, tanto desde el punto de vista  f&iacute;sico como psicol&oacute;gico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#83"><font face="Verdana"><sup>83</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup><a name="-83"></a>. Los denominadores comunes para calidad fueron  fundamentalmente el rasgo de personalidad, el sufrimiento psicol&oacute;gico y  apoyo familiar, pero resulta interesante ver que la gravedad de la enfermedad  no era un determinante de calidad.&nbsp; </font></p>         <p>  <multicol gutter="18" cols="2"></multicol> </p>       <p align="left"><font face="Verdana" size="2"> Un ductus permeable es una lesi&oacute;n f&aacute;cilmente tratable, pero si no se la  trata, los ductus de gran tama&ntilde;o pueden llevar a patolog&iacute;a vascular pulmonar.  La presentaci&oacute;n tard&iacute;a en pa&iacute;ses en desarrollo significa que muchos pacientes  tienen un nivel de hipertensi&oacute;n pulmonar que har&iacute;a peligrosa la intervenci&oacute;n.  Los resultados de un estudio en M&eacute;xico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#84"><font face="Verdana"><sup>84</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-84"></a>son importantes y alentadores.  Comunicaron 168 pacientes con ductus arteriosus permeable (DAP) y una presi&oacute;n  sist&oacute;lica de la arteria pulmonar de 50 mm Hg. La media de edad fue 10,3  &plusmn; 14,3 a&ntilde;os (mediana: 3,9): el di&aacute;metro del DAP fue 6,4 &plusmn; 2,9 mm (mediana:  5,9), la presi&oacute;n sist&oacute;lica de la arteria pulmonar fue 63,5 &plusmn; 16,2 mm Hg  (mediana: 60). La tasa de &eacute;xito total fue 98,2%. El seguimiento de 145  (86,3%) casos para 37,1 &plusmn; 24 meses (mediana: 34,1) mostr&oacute; una disminuci&oacute;n  adicional de la presi&oacute;n pulmonar a 30,1 &plusmn; 7,7 mm Hg (p&lt;0,0001). Los autores  han demostrado que en casos seleccionados el tratamiento percut&aacute;neo del  ductus hipertensivo es seguro y efectivo y que las presiones pulmonares  disminuyen inmediatamente y siguen cayendo con el tiempo.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font face="Verdana" size="2"> <b>Im&aacute;genes de cardiopat&iacute;as cong&eacute;nitas&nbsp;</b> </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font face="Verdana" size="2"> Tal vez uno de los aspectos m&aacute;s seductores de la cardiopat&iacute;a cong&eacute;nita  es la est&eacute;tica de las anomal&iacute;as. Esto se presta a la imagenolog&iacute;a, y las  im&aacute;genes de cardiopat&iacute;as cong&eacute;nitas iluminan las p&aacute;ginas de muchas revistas  importantes de cardiolog&iacute;a. Por lo tanto, parece apropiado finalizar este  Almanac haciendo referencia a algunas de las im&aacute;genes m&aacute;s impresionantes  que reflejan las &aacute;reas clave en las cardiopat&iacute;as cong&eacute;nitas arriba analizadas,  incluyendo la intervenci&oacute;n</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#85">85</a></font><font face="Verdana" size="2">-</font><font color="#1f1a17" face="Verdana" size="2"><a href="#91">91</a></font><font face="Verdana" size="2">)</font></sup><font face="Verdana" size="2"><a name="-85"></a><a name="-86"></a><a name="-87"></a><a name="-88"></a><a name="-89"></a><a name="-90"></a><a name="-91"></a>, la insuficiencia card&iacute;aca fetal y neonatal<sup>(</sup></font><sup><font color="#1f1a17" face="Verdana" size="2"><a href="#92">92</a></font><font face="Verdana" size="2">-</font><font color="#1f1a17" face="Verdana" size="2"><a href="#95">95</a></font></sup><font face="Verdana" size="2"><sup>)</sup>,<a name="-92"></a>  <a name="-93"></a><a name="-94"></a><a name="-95"></a>y el soporte mec&aacute;nico<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#96"><font face="Verdana"><sup>96</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>,<a name="-96"></a> las cardiopat&iacute;as cong&eacute;nitas en adolescentes  y adultos<sup>(</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#97"><font face="Verdana"><sup>97</sup></font></a></font><font face="Verdana" size="2"><sup>,</sup></font><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#98"><font face="Verdana"><sup>98</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup>,<a name="-97"></a><a name="-98"></a> la imagenolog&iacute;a avanzada con RMN y TC</font><sup><font face="Verdana" size="2">(</font><font color="#1f1a17" face="Verdana" size="2"><a href="#99">99</a></font><font face="Verdana" size="2">,</font></sup><font color="#1f1a17" face="CentSchbook BT" size="2"><a href="#100"><font face="Verdana"><sup>100</sup></font></a></font><font face="Verdana" size="2"><sup>)</sup> <a name="-99"></a><a name="-100"></a>y las morfolog&iacute;as  inhabituales<sup>(</sup></font><sup><font color="#1f1a17" face="Verdana" size="2"><a href="#101">101</a></font><font face="Verdana" size="2">-</font><font color="#1f1a17" face="Verdana" size="2"><a href="#107">107</a></font></sup><font face="Verdana" size="2"><sup>)</sup><a name="-101"></a><a name="-102"></a><a name="-103"></a><a name="-104"></a><a name="-105"></a><a name="-106"></a><a name="-107"></a>. Todo ello bien justifica una mirada, para iluminar  la noche en las revistas de cardiolog&iacute;a.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Con la contribuci&oacute;n de: MB y ND realizaron la revisi&oacute;n bibliogr&aacute;fica; MB  redact&oacute; el primer borrador del manuscrito, que fue revisado y aprobado  por ambos autores.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Competencia de intereses: Ninguna.&nbsp; </font></p>        <p align="left"><font face="Verdana" size="2"> Provenencia y revisi&oacute;n por pares: Encargado; arbitraje interno por pares.&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <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>Dolk H, Loane M, Garne E; European Surveillance of Congenital Anomalies  (EUROCAT) Working Group.</b> Congenital heart defects in Europe: prevalence  and perinatal mortality, 2000 to 2005. Circulation 2011;123:841-9.    &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>Van der Linde D, Konings EE, Slager MA, et al.</b> Birth prevalence of congenital  heart disease worldwide: a systematic review and meta-analysis. J Am Coll  Cardiol 2011;58:2241-7.    &nbsp; </font></p>        ]]></body>
<body><![CDATA[<!-- 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>Tararbit K, Houyel L, Bonnet D, et al.</b> Risk of congenital heart defects  associated with assisted reproductive technologies: a population-based  evaluation. Eur Heart J 2011;32:500-8.    &nbsp; </font></p>        <!-- 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>Van Engelen K, Topf A, Keavney BD, et al.</b> 22q11.2 Deletion Syndrome is  under- recognised in adult patients with tetralogy of Fallot and pulmonary  atresia. Heart 2010;96:621-4.    &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;<b>Griffin HR, Topf A, Glen E, et al. </b>Systematic survey of variants in TBX1  in non- syndromic tetralogy of Fallot identifies a novel 57 base pair deletion  that reduces transcriptional activity but finds no evidence for association  with common variants. Heart 2010;96:1651-5.    &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;<b>Caleshu C, Day S, Rehm HL, et al.</b> Use and interpretation of genetic tests  in cardiovascular genetics. Heart 2010;96:1669-75.    &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>De Luca A, Sarkozy A, Consoli F, et al. </b>Familial transposition of the  great arteries caused by multiple mutations in laterality genes. Heart  2010;96:673-7.    &nbsp; </font></p>        ]]></body>
<body><![CDATA[<!-- ref --><p align="left"><font face="Verdana" size="2"><a name="8"></a> </font><font color="#1f1a17" face="Verdana" size="2"><a href="#-80"> 8</a></font><font face="Verdana" size="2">.&nbsp;&nbsp;&nbsp;&nbsp;<b>Keavney B.</b> Left, right: a step forward in understanding transposition  of the great arteries. Heart 2010;96:653-5.    &nbsp; </font></p>        <!-- 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>Zhao JY, Yang XY, Gong XH, et al</b>. Functional variant in methionine synthase  reductase intron-1 significantly increases the risk of congenital heart  disease in the Han Chinese population. Circulation 2012;125:482-90.    &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>Marek J, Tomek V, Skovranek J, et al.</b> Prenatal ultrasound screening  of congenital heart disease in an unselected national population: a 21-year  experience. Heart 2011;97:124-30.    &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>Stressig R, Fimmers R, Eising K, et al.</b> Preferential streaming of the  ductus venosus and inferior caval vein towards the right heart is associated  with left heart underdevelopment in human fetuses with left-sided diaphragmatic  hernia. Heart 2010;96: 1564-8.    &nbsp; </font></p>         <p>&nbsp;</p>    <multicol gutter="18" cols="2"></multicol>     <!-- 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;<b>Eliasson H, Sonesson SE, Sharland G, et al; Fetal working group of the  European association of pediatric cardiology.</b> Isolated atrioventricular  block in the fetus: a retrospective, multinational, multicenter study of  175 patients. Circulation 2011;124:1919-26.    &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>Baruteau AE, Fouchard S, Behaghel A, et al. </b>Characteristics and long-term  outcome of non-immune isolated atrioventricular block diagnosed in utero  or early childhood: a multicentre study. Eur Heart J 2012;33:622-9.    &nbsp; </font></p>        <!-- 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>Izmirly PM, Saxena A, Kim MY, et al.</b> Maternal and fetal factors associated  with mortality and morbidity in a multi-racial/ethnic registry of anti-SSA/Ro-associated  cardiac neonatal lupus. Circulation 2011;124:1927-35.    &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>Trucco SM, Jaeggi E, Cuneo B, et al. </b>Use of intravenous gamma globulin  and corticosteroids in the treatment of maternal autoantibody-mediated  cardiomyopathy. J Am Coll Cardiol 2011;57:715-23.    &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>Jaeggi ET, Silverman ED, Laskin C, et al.</b> Prolongation of the atrioventricular  conduction in fetuses exposed to maternal anti-Ro/SSA and anti-La/SSB antibodies  did not predict progressive heart block. A prospective observational study  on the effects of maternal antibodies on 165 fetuses. J Am Coll Cardiol  2011;57:1487-92.    &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>Jaeggi ET, Carvalho JS, De Groot E, et al.</b> Comparison of transplacental  treatment of fetal supraventricular tachyarrhythmias with digoxin, flecainide,  and sotalol: results of a nonrandomized multicenter study. Circulation  2011;124:1747-54.    &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">.<b>&nbsp;&nbsp;&nbsp;&nbsp;Migliore F, Zorzi A, Michieli P, et al.</b> Prevalence of cardiomyopathy  in Italian asymptomatic children with electrocardiographic T-wave inversion  at preparticipation screening. Circulation 2012; 125: 529-38.    &nbsp; </font></p>        <!-- 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>Alvarez JA, Orav EJ, Wilkinson JD, et al; Pediatric cardiomyopathy registry  Investigators. </b>Competing risks for death and cardiac transplantation in  children with dilated cardiomyopathy: results from the pediatric cardiomyopathy  registry. Circulation 2011;124:814-23.    &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>Giardini A, Fenton M, Andrews RE, et al.</b> Peak oxygen uptake correlates  with survival without clinical deterioration in ambulatory children with  dilated cardiomyopathy. Circulation 2011;124: 1713-18.    &nbsp; </font></p>        <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>Irving C, Parry G, O&rsquo;Sullivan J, et al.</b> Cardiac transplantation in adults  with congenital heart disease. 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<body><![CDATA[<!-- 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>Almond CS, Singh TP, Gauvreau K, et al.</b> Extracorporeal membrane oxygenation  for bridge to heart transplantation among children in the United States:  analysis of data from the organ procurement and transplant network and  extracorporeal life support organization registry. Circulation 2011;123:2975-84.    &nbsp; </font></p>        <!-- 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>Stiller B, Benk C, Schlensak C.</b> Congenital heart disease: mechanical  cardiovascular support in infants and children. Heart 2011;97:596-602.    &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>Williams RV, Zak V, Ravishankar C, et al; Pediatric Heart Network Investigators.  </b>Factors affecting growth in infants with single ventricle physiology: a  report from the Pediatric Heart Network Infant Single Ventricle Trial.  J Pediatr 2011;159:1017-22.e2.    &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>Mital S, Chung WK, Colan SD, et al; Pediatric Heart Network Investigators.</b>  Renin-angiotensin-aldosterone genotype influences ventricular remodeling  in infants with single ventricle. Circulation 2011;123:2353-62.    &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>Beghetti M.</b> Fontan and the pulmonary circulation: a potential role for  new pulmonary hypertension therapies. Heart 2010;96:911-16.    &nbsp; </font></p>        ]]></body>
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