<?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>0188-2198</journal-id>
<journal-title><![CDATA[Revista mexicana de cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cardiol]]></abbrev-journal-title>
<issn>0188-2198</issn>
<publisher>
<publisher-name><![CDATA[Asociación Nacional de Cardiólogos de México, Sociedad de Cardiología Intervencionista de México]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-21982014000200001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cierre percutáneo primario del defecto del tabique interventricular postinfarto con el dispositivo de Amplatzer: resultados inmediatos y seguimiento a largo plazo]]></article-title>
<article-title xml:lang="en"><![CDATA[Primary percutaneous closure of postinfarction septal defect with Amplatzer device: immediate results and long-term follow-up]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacios-Rodríguez]]></surname>
<given-names><![CDATA[Juan Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñiz García]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonfil Flores]]></surname>
<given-names><![CDATA[Miguel A]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De la Cruz Obregón]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galván García]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantú Ramírez]]></surname>
<given-names><![CDATA[Samuel]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Unidades Médicas de Alta Especialidad Departamento de Hemodinamia e Intervención]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Unidades Médicas de Alta Especialidad Departamento de Hemodinamia e Intervención]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2014</year>
</pub-date>
<volume>25</volume>
<numero>2</numero>
<fpage>65</fpage>
<lpage>72</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-21982014000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-21982014000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-21982014000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: La reparación quirúrgica inmediata de una comunicación interventricular que complica el infarto agudo del miocardio (CIV post-IAM) se asocia con la alta mortalidad. El cierre con dispositivo percutáneo parece ser seguro y efectivo en pacientes con CIV post-IAM; reportamos los resultados inmediatos y a largo plazo en la utilización del dispositivo Amplatzer en el cierre primario de una CIV post-IAM. Material y métodos: De junio del 2006 a enero del 2014, 17 pacientes portadores de una CIV post-IAM se sometieron a un cierre percutáneo con Amplatzer a una edad promedio de 66.8 ± 5.5, 82.4% en shock cardiogénico (ShC), el 35.3% recibieron tratamiento trombolítico (TT) en ventana, el tiempo promedio del diagnóstico de CIV al cierre percutáneo (IP) fue de 8.7 ± 5.8 días. Resultados: Con un seguimiento actual de 13.25 ± 12.6 meses, el éxito del procedimiento fue del 100%, el shunt (QP:QS) se redujo de 2.9 ± 0.95 a 1.5 ± 0.40 L/min p = 0.0001, 12 pacientes (70.6%) se sometieron a una Angioplastía Coronaria Transluminal Percutánea (ACTP) del vaso culpable posterior al cierre de la CIV. La mortalidad a 30 días fue de 52.9%, siendo más alta en el paciente con ShC versus no-ShC 64.3 versus 0% p = 0.043 OR 2.8 (IC 95% 1.38-5.6). Conclusión: El cierre primario de CIV post-IAM es una técnica muy promisoria que puede ser realizada con una alta tasa de éxito y mínimas complicaciones y puede ser tomado como una alternativa a la cirugía. Sin embargo, a pesar de ser una técnica menos invasiva, la mortalidad permanece alta y muy evidente en el paciente en ShC.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: The immediate surgical repair of a ventricular septal defect complicating acute myocardial infarction (VSD post-AMI) is associated with high mortality. The percutaneous closure device is safe and effective in patients with post-infarction VSD; we report the immediate and long term results in the use of the Amplatzer device in the primary closure of post infarction VSD. Material and methods: From June 2006 to January 2014, 17 patients carriers of post-infarction VSD underwent percutaneous Amplatzer closure with a mean age 66.8 ± 5.5, 82.4% in cardiogenic shock (CS), 35.3% were thrombolyzed (TT) in window, the average time to percutaneous closure of VSD 8.7 ± 5.8 days. Results: With a current monitoring of 13.25 ± 12.6 months procedural success were in 100% shunt (QP:QS) was reduced from 2.9 to 1.5 ± 0.40 ± 0.95 L/min p = 0.0001, 12 patients (70.6%) undergoing PTCA the culprit vessel post-closure of the VSD. Global mortality at 30 days was 52.9%, being higher in patients with CS versus 64.3 versus 0% no-CS p = 0.043 OR 2.8 (CI 95% 1.38-5.6). Conclusion: The primary closure of postinfarction VSD is a very promising technique that can be performed with a high success rate and minimal complications and may be taken as an alternative to surgery. However despite being a less invasive technique remains high mortality very evident in patients in CS.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Infarto al miocardio]]></kwd>
<kwd lng="es"><![CDATA[comunicación interventricular]]></kwd>
<kwd lng="es"><![CDATA[dispositivo Amplatzer]]></kwd>
<kwd lng="es"><![CDATA[choque cardiogénico]]></kwd>
<kwd lng="en"><![CDATA[Acute myocardial infarction]]></kwd>
<kwd lng="en"><![CDATA[ventricular septal defect]]></kwd>
<kwd lng="en"><![CDATA[Amplatzer occluder]]></kwd>
<kwd lng="en"><![CDATA[cardiogenic shock]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n cl&iacute;nica</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Cierre percut&aacute;neo primario del defecto del tabique interventricular postinfarto con el dispositivo de Amplatzer: resultados inmediatos y seguimiento a largo plazo</b></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="3"><b>Primary percutaneous closure of postinfarction septal defect with Amplatzer device: immediate results and long-term follow-up</b></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Juan Manuel Palacios-Rodr&iacute;guez,&#42; Arturo Mu&ntilde;iz Garc&iacute;a,&#42;&#42; Miguel A Bonfil Flores,&#42;&#42; Ram&oacute;n De la Cruz Obreg&oacute;n,&#42;&#42; Eduardo Galv&aacute;n Garc&iacute;a,&#42;&#42; Samuel Cant&uacute; Ram&iacute;rez&#42;&#42;</b></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">&#42; Jefe del Departamento de Hemodinamia e Intervenci&oacute;n.    <br>&#42;&#42; Cardi&oacute;logos Intervencionistas adscritos al Departamento.    ]]></body>
<body><![CDATA[<br>    <br>Departamento de Hemodinamia e Intervenci&oacute;n. UMAE n&uacute;m. 34, Instituto Mexicano del Seguro Social. Monterrey, Nuevo Le&oacute;n, M&eacute;xico.</font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Direcci&oacute;n para correspondencia:</i>    <br><b>Dr. Juan Manuel Palacios</b> <b>Rodr&iacute;guez</b>    <br>Minnesota N&uacute;m. 300,    <br>Colonia Rinc&oacute;n de las Puentes,    <br>San Nicol&aacute;s de los Garza, 66460,    <br>Monterrey, Nuevo Le&oacute;n, M&eacute;xico.    <br>Tel: 80574286 y 87    ]]></body>
<body><![CDATA[<br>E-mail: <a href="mailto:palaciosrj@prodigy.net.mx" target="_blank">palaciosrj@prodigy.net.mx</a></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>RESUMEN</b> </font></p>     <p align="justify"><font face="verdana" size="2"><b>Introducci&oacute;n:</b> La reparaci&oacute;n quir&uacute;rgica inmediata de una comunicaci&oacute;n interventricular que complica el infarto agudo del miocardio (CIV post-IAM) se asocia con la alta mortalidad. El cierre con dispositivo percut&aacute;neo parece ser seguro y efectivo en pacientes con CIV post-IAM; reportamos los resultados inmediatos y a largo plazo en la utilizaci&oacute;n del dispositivo Amplatzer en el cierre primario de una CIV post-IAM. <b>Material y m&eacute;todos:</b> De junio del 2006 a enero del 2014, 17 pacientes portadores de una CIV post-IAM se sometieron a un cierre percut&aacute;neo con Amplatzer a una edad promedio de 66.8 &plusmn; 5.5, 82.4% en shock cardiog&eacute;nico (ShC), el 35.3% recibieron tratamiento trombol&iacute;tico (TT) en ventana, el tiempo promedio del diagn&oacute;stico de CIV al cierre percut&aacute;neo (IP) fue de 8.7 &plusmn; 5.8 d&iacute;as. <b>Resultados:</b> Con un seguimiento actual de 13.25 &plusmn; 12.6 meses, el &eacute;xito del procedimiento fue del 100%, el shunt (QP:QS) se redujo de 2.9 &plusmn; 0.95 a 1.5 &plusmn; 0.40 L/min p = 0.0001, 12 pacientes (70.6%) se sometieron a una Angioplast&iacute;a Coronaria Transluminal Percut&aacute;nea (ACTP) del vaso culpable posterior al cierre de la CIV. La mortalidad a 30 d&iacute;as fue de 52.9%, siendo m&aacute;s alta en el paciente con ShC versus no-ShC 64.3 versus 0% p = 0.043 OR 2.8 (IC 95% 1.38-5.6). <b>Conclusi&oacute;n:</b> El cierre primario de CIV post-IAM es una t&eacute;cnica muy promisoria que puede ser realizada con una alta tasa de &eacute;xito y m&iacute;nimas complicaciones y puede ser tomado como una alternativa a la cirug&iacute;a. Sin embargo, a pesar de ser una t&eacute;cnica menos invasiva, la mortalidad permanece alta y muy evidente en el paciente en ShC.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Infarto al miocardio, comunicaci&oacute;n interventricular, dispositivo Amplatzer, choque cardiog&eacute;nico.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>ABSTRACT</b></font></p>     <p align="justify"><font face="verdana" size="2"><b>Introduction:</b> The immediate surgical repair of a ventricular septal defect complicating acute myocardial infarction (VSD post-AMI) is associated with high mortality. The percutaneous closure device is safe and effective in patients with post-infarction VSD; we report the immediate and long term results in the use of the Amplatzer device in the primary closure of post infarction VSD. <b>Material and methods: </b>From June 2006 to January 2014, 17 patients carriers of post-infarction VSD underwent percutaneous Amplatzer closure with a mean age 66.8 &plusmn; 5.5, 82.4% in cardiogenic shock (CS), 35.3% were thrombolyzed (TT) in window, the average time to percutaneous closure of VSD 8.7 &plusmn; 5.8 days. <b>Results:</b> With a current monitoring of 13.25 &plusmn; 12.6 months procedural success were in 100% shunt (QP:QS) was reduced from 2.9 to 1.5 &plusmn; 0.40 &plusmn; 0.95 L/min p = 0.0001, 12 patients (70.6%) undergoing PTCA the culprit vessel post-closure of the VSD. Global mortality at 30 days was 52.9%, being higher in patients with CS versus 64.3 versus 0% no-CS p = 0.043 OR 2.8 (CI 95% 1.38-5.6). <b>Conclusion:</b> The primary closure of postinfarction VSD is a very promising technique that can be performed with a high success rate and minimal complications and may be taken as an alternative to surgery. However despite being a less invasive technique remains high mortality very evident in patients in CS.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b>Acute myocardial infarction, ventricular septal defect, Amplatzer occluder, cardiogenic shock.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>INTRODUCCI&Oacute;N</b></font></p>     <p align="justify"><font face="verdana" size="2">La comunicaci&oacute;n interventricular postinfarto (CIV post-IAM) es una complicaci&oacute;n fatal que se presentaba en 1 a 3% en la era antes de la terapia trombol&iacute;tica.<sup>1</sup> Los factores de riesgo para una CIV incluyen la hipertensi&oacute;n arterial, edad avanzada, sexo femenino, diabetes mellitus, ausencia de una historia de angina de pecho o IAM, estenosis coronaria severa u oclusi&oacute;n arterial sin compensaci&oacute;n colateral circulatoria.<sup>2-4</sup> A pesar de los avances en las terapias de reperfusi&oacute;n farmacol&oacute;gicas y de la intervenci&oacute;n percut&aacute;nea (IP) y una percepci&oacute;n en la disminuci&oacute;n de CIV post-IAM, esto todav&iacute;a se produce entre 0.2-0.4% de todos los pacientes con IAM.<sup>5-7</sup> Hasta la fecha la CIV post-IAM conlleva un pron&oacute;stico muy pobre,<sup>8,9</sup> m&aacute;s del 80% de los pacientes no tratados mueren en el primer mes y mayor del 90% en el primer a&ntilde;o.<sup>10,11</sup> La mortalidad de los pacientes con choque cardiog&eacute;nico por CIV es tan alto, como del 67% dentro las primeras 48 horas y del 100% en el primer mes.<sup>12</sup> En este contexto la reparaci&oacute;n quir&uacute;rgica de la CIV post-IAM se ha definido como el tratamiento de elecci&oacute;n.<sup>13,14</sup> Sin embargo, la tasa de mortalidad es dependiente de tiempo, siendo &gt; 50% en las primeras dos semanas del infarto y del 38% &gt; 15 d&iacute;as de iniciado el IAM.<sup>15,16</sup> Las complicaciones post-Qx son una CIV residual por dehiscencia del parche del 10-20%.<sup>17,18</sup> Hay informes basados en series peque&ntilde;as de pacientes o en casos individuales en el cierre percut&aacute;neo de CIV post-IAM, y la experiencia es limitada.<sup>19-21</sup> Los dispositivos Amplatzer proporcionan nuevas posibilidades y opciones para el tratamiento percut&aacute;neo de esta complicaci&oacute;n. En este informe presentamos nuestros resultados finales de cierre primario en pacientes seleccionados para el cierre de CIV post-IAM utilizando el dispositivo de Amplatzer, un dispositivo originalmente hecho para el cierre percut&aacute;neo de la comunicaci&oacute;n interauricular.<sup>22</sup></font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>PACIENTES Y M&Eacute;TODOS</b></font></p>     <p align="justify"><font face="verdana" size="2"><b>Material y m&eacute;todos:</b> se llev&oacute; a cabo un estudio observacional, retrospectivo, anal&iacute;tico y comparativo, obteni&eacute;ndose la informaci&oacute;n de la base de datos del Departamento de Hemodin&aacute;mica, UMAE n&uacute;m. 34, IMSS, del periodo comprendido de junio del 2006 a enero de 2014, y se incluyeron a un total de 17 pacientes con diagn&oacute;stico de CIV post-IAM. Se utilizaron las t&eacute;cnicas descritas previamente.<sup>23-25</sup> El cierre percut&aacute;neo fue considerado en pacientes con significativo cortocircuito de izquierda a derecha (QP/QS &ge; 1.5), anatom&iacute;a del defecto y la ubicaci&oacute;n accesibles para el cierre con el dispositivo. El tama&ntilde;o y la localizaci&oacute;n de cada defecto, as&iacute; como los criterios de exclusi&oacute;n, se evaluaron por ecocardiograf&iacute;a transtor&aacute;cica o transesof&aacute;gica y consist&iacute;a en una CIV grande (&ge; 35 mm), un CIV apical sin adecuado reborde muscular y un variador de velocidad basal que se encontrara demasiado cerca de las v&aacute;lvulas mitral, tric&uacute;spide y/o aparato valvular a&oacute;rtica. Durante el periodo de nuestro estudio ninguno de nuestros pacientes fue excluido, debido a los criterios definidos anteriormente. Los datos cl&iacute;nicos de los pacientes se exponen en el <a href="#a1t1" target="_self">cuadro I</a> </font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a1t1"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n2/a1t1.jpg"></p>    ]]></body>
<body><![CDATA[<p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     <p align="justify"><font face="verdana" size="2">Todos procedentes de otros hospitales del IMSS con una edad promedio de 66.8 &plusmn; 8.7 a&ntilde;os, la IP se realiz&oacute; en 8.7 &plusmn; 5.9 d&iacute;as promedio en nueve pacientes (52.9%) en los primeros siete d&iacute;as y el resto entre 8 y 20 d&iacute;as posteriores al Dx CIV; seis pacientes (35.3%) recibieron tratamiento trombol&iacute;tico (TT) en ventana (&lt; 6 horas de inicio del IAM), todos con insuficiencia cardiaca sintom&aacute;tica al momento del estudio: 14 pacientes (82.4%) presentaron ShC, amerit&aacute;ndose bal&oacute;n a&oacute;rtico de contrapulso (BIAco) y apoyo con inotr&oacute;picos, previo al cierre percut&aacute;neo de la CIV realizamos en todos una coronariograf&iacute;a selectiva, 14 pacientes presentaron enfermedad multivaso, en 12 pacientes realizamos angioplastia con stent -en 5 pacientes en m&aacute;s de un vaso (incluyendo el vaso culpable)-. En todos los pacientes hicimos primero el cierre de la CIV y 24 a 48 horas posteriores la ACTP del vaso culpable (<a href="../img/revistas/rmc/v25n2/a1t2.jpg" target="_blank">Cuadro II</a>) </font></p>     <p align="justify"><font face="verdana" size="2">El punto crucial del procedimiento fue el sondeo del tabique interventricular: el defecto se cruz&oacute; desde el ventr&iacute;culo derecho en nueve casos (v&iacute;a subclavia) y en ocho desde el izquierdo (v&iacute;a arteria femoral) (<a href="#a1f1" target="_self">Figura 1</a>)  El cierre se efectu&oacute; por la vena subclavia derecha (VSCD) o por la vena femoral derecha (VFD) bajo control ecocardiogr&aacute;fico y fluorosc&oacute;pico en los primeros tres casos de cierre en el resto &uacute;nicamente bajo control fluoroscopio, y se eligi&oacute; el acceso que originaba menor curva para prevenir una posible acodadura de la vaina. En todos se midi&oacute; el defecto por angiograf&iacute;a cuantitativa en una oblicua anterior izquierda, 45 con cat&eacute;ter 6 Fr de referencia, con un di&aacute;metro del defecto CIV de 14.3 + 3.5 mm (r = 6-20 mm). De acuerdo con la morfolog&iacute;a del tabique y las propiedades de los dispositivos se eligieron los siguientes Amplatzers (AGA Medical Corp., Golden Valley, Minnesota, USA): 16 oclusores septal auricular (OSA) y un oclusor septal muscular ventricular (OSMV).</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a1f1"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n2/a1f1.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Evaluaci&oacute;n ecocardiogr&aacute;fica: </b>actualmente la ecocardiograf&iacute;a-Doppler es la prueba complementaria de elecci&oacute;n para el diagn&oacute;stico de la CIV post-IAM, con sensibilidad y especificidad pr&aacute;cticamente del 100%.<sup>26</sup> La ecocardiograf&iacute;a localiza y caracteriza el defecto septal, determina el grado de disfunci&oacute;n ventricular derecha e izquierda, valora la presi&oacute;n pulmonar y excluye la coexistencia de insuficiencia mitral o rotura de la pared libre ventricular (<a href="#a1f2" target="_self">Figura 2</a>) <sup>27</sup> En todos los pacientes con sospecha de CIV post-IAM se realiz&oacute; ecocardiograf&iacute;a bidimensional con medici&oacute;n de flujos mediante el efecto Doppler. En los pacientes derivados desde otros centros hospitalarios con el diagn&oacute;stico establecido de CIV post-IAM se repiti&oacute; el estudio ecocardiogr&aacute;fico para confirmar los hallazgos y valorar la posible progresi&oacute;n del deterioro de la funci&oacute;n ventricular.</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a1f2"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n2/a1f2.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     <p align="justify"><font face="verdana" size="2"><b>Evaluaci&oacute;n estad&iacute;stica:</b> utilizamos el sistema estad&iacute;stico SPSS 20, utilizando para variables cualitativas (ordinales-nominales) la &chi;<sup>2</sup> de Pearson y para variables num&eacute;ricas la t de Student, consider&aacute;ndose un valor de significancia estad&iacute;stica una p &le; 0.05. Para la sobrevivencia a largo plazo utilizamos la curva de Kaplan-Meier y las diferencias entre pacientes con o sin ShC o TT fueron evaluados por el test Log-Rank.</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">  <b>RESULTADOS</b> (<a href="../img/revistas/rmc/v25n2/a1t3.jpg" target="_blank">Cuadro III</a>)</font></p>     <p align="justify"><font face="verdana" size="2">Con una edad promedio de 66.7 &plusmn; 8.8 se intenta el cierre percut&aacute;neo de una CIV post-IAM en 17 pacientes. La oclusi&oacute;n se hizo en 16 pacientes con Amplatzer para CIA y s&oacute;lo en un paciente con oclusor para CIV muscular, el tama&ntilde;o promedio del dispositivo fue de 23.8 + 4.11 mm y el tiempo promedio de Dx de la CIV post-IAM al cierre percut&aacute;neo fue de 8.7 + 5.8 d&iacute;as (r = 2 a 20 d&iacute;as). En todos se logr&oacute; la colocaci&oacute;n y oclusi&oacute;n del defecto, logr&aacute;ndose una disminuci&oacute;n significativa del shunt con un QP/QS pre 2.99 + 0.95 y postcolocaci&oacute;n de 1.52 + 0.45 p &lt; 0.0001, una depuraci&oacute;n de creatinina (Dep. Cr.) calculada en 36.8 + 11.19 mL/min; siete pacientes (41.2%) terminaron en di&aacute;lisis renal, present&aacute;ndose una mortalidad del 100 versus 20% no di&aacute;lisis p = 0.027, la colocaci&oacute;n del dispositivo se logr&oacute; en los 17 pacientes (100%), en 9 pacientes el cierre CIV se llev&oacute; &le; de 7 d&iacute;as (r = 2-7 d&iacute;as) y en 8 pacientes &gt; 7 d&iacute;as (r = 8-20 d&iacute;as) con una mortalidad entre ambos grupos de 55.5 versus 50% p = 0.819 respectivamente, la FEVI al momento de la IP de 36.9 + 5.5% (r = 25-50) a pesar del &eacute;xito t&eacute;cnico nueve pacientes persistieron con falla multiorg&aacute;nica y muerte entre 1 y 15 d&iacute;as postcierre CIV, una paciente present&oacute; dislocaci&oacute;n parcial del Amplatzer al cuarto d&iacute;a post-IP, siendo llevada a cirug&iacute;a y falleciendo 10 d&iacute;as posterior a la cirug&iacute;a.</font></p>     <p align="justify"><font face="verdana" size="2">En el seguimiento a 30 d&iacute;as los condicionantes de mayor mortalidad fue el ShC, necesidad de di&aacute;lisis renal; 64.2 versus 0% p &lt; 0.043 y 100 versus 20% p &lt; 0.027 respectivamente, as&iacute; tambi&eacute;n los paciente no reciben TT versus s&iacute; TT presentaron mayor mortalidad 72.7 versus 16.6% p &lt; 0.001.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Seguimiento a largo plazo:</b> a un seguimiento de 13.25 + 12.6 meses (r = 2 a 42 meses) ocho pacientes (47 %) estaban libres de eventos cardiovasculares mayores (ECVM) (muerte, IAM, reintervenci&oacute;n) en una clase NYHA I, con un incremento significativo en la FEVI previa 36.7 + 8.8 actual de 48.1 + 6.03 p &lt; 0.001, no document&aacute;ndose shunt en ninguno de los pacientes. La curva de supervivencia de Kaplan-Meier en pacientes en ShC versus no ShC a 30 d&iacute;as, as&iacute; como la sobrevida a largo plazo en pacientes sometidos a TT versus no TT son descritos en la <a href="#a1f3" target="_self">figura 3</a> </font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a1f3"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n2/a1f3.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>DISCUSI&Oacute;N</b></font></p>     <p align="justify"><font face="verdana" size="2">En 1988, Lock et al. informaron del cierre transcat&eacute;ter en la CIV post-IAM con el paraguas doble Rashkind;<sup>28</sup> sin embargo, los tres pacientes fallecieron poco despu&eacute;s del procedimiento. Desde entonces, s&oacute;lo informes espor&aacute;dicos han aparecido en la literatura con el uso de Amplatzer oclusor septal auricular (OSA). El n&uacute;mero global de procedimientos publicados de cierre percut&aacute;neo en CIV post-IAM es &lt; 100 pacientes y la mayor&iacute;a de estos pacientes se sometieron a cierre de la CIV en la fase cr&oacute;nica/subaguda, o estaban restringidos a pacientes con cortocircuito residual tras parche quir&uacute;rgico.<sup>20</sup> En consecuencia, estas series publicadas tienen un inherente sesgo de selecci&oacute;n, ya que los pacientes de mayor riesgo habr&iacute;an muerto antes de llegar a la fase subaguda/cr&oacute;nica de la enfermedad. Por el contrario, nosotros presentamos una serie prospectiva de 17 pacientes consecutivos con CIV post-IAM ingresados a la Unidad de Cuidados Coronarios en la UMAE n&uacute;m. 34, IMSS, en Monterrey, Nuevo Le&oacute;n. A pesar de que en </font></p>     <p align="justify"><font face="verdana" size="2">varios de nuestros casos los pacientes estaban en grave ShC y la posibilidad de un resultado exitoso se consideraba poco probable, el cierre intervencionista fue, sin embargo, tratando de determinar si pod&iacute;amos mejorar el sombr&iacute;o pron&oacute;stico de estos pacientes.</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>Ruptura septal ventricular aguda</b></font></p>     <p align="justify"><font face="verdana" size="2">En el periodo agudo del defecto, en los primeros tres a cinco d&iacute;as post-IAM, se desarrolla necrosis de coagulaci&oacute;n y un estado l&iacute;ticos peri-inflamaci&oacute;n por enzimas liberadas por los neutr&oacute;filos provocando la desintegraci&oacute;n y necrosis del miocardio. El sitio de la ruptura del septo se rodea por el tejido necr&oacute;tico fr&aacute;gil. Debido a la necrosis continua, la resorci&oacute;n y retracci&oacute;n del tejido infartado, el defecto se agranda en tama&ntilde;o.<sup>29</sup> La curaci&oacute;n despu&eacute;s del infarto de miocardio no es notable sino hasta despu&eacute;s de la tercera semana.<sup>30</sup></font></p>     <p align="justify"><font face="verdana" size="2">Los resultados de cierre percut&aacute;neo con dispositivo son dif&iacute;ciles de comparar con los de las series publicadas quir&uacute;rgica, dado el peque&ntilde;o n&uacute;mero de pacientes y el sesgo de selecci&oacute;n inherente presentes en casi todos estos estudios. Los predictores de mayor mortalidad quir&uacute;rgica incluyen inestabilidad hemodin&aacute;mica, disfunci&oacute;n ventricular, CIV inferior o basal y abordaje agudo (&lt; 15 d&iacute;as).<sup>31-34</sup> En contraste con la cirug&iacute;a, los defectos inferobasales son m&aacute;s f&aacute;ciles de cerrar con una t&eacute;cnica intervencionista, debido al acceso m&aacute;s favorable de la vena subclavia o yugular derechas. Las tasas de mortalidad actuales en el cierre quir&uacute;rgico CIV post-IAM se mantienen altas en 20 a 87%, dependiendo de la gravedad del paciente, la duraci&oacute;n del seguimiento en algunos estudios y el tiempo de la correcci&oacute;n quir&uacute;rgica &lt; o &gt; de 4-6 semanas, despu&eacute;s de la ocurrencia de la CIV para permitir la cicatrizaci&oacute;n del reborde circundante.<sup>35,36</sup> Tal pr&aacute;ctica sin duda dar&aacute; lugar a resultados sesgados sobreviviendo los m&aacute;s aptos y menos enfermos.<sup>37</sup> En nuestro estudio no excluimos a ning&uacute;n paciente, a pesar de que el 84.2% de los pacientes estaban en estado de ShC, incidencia mayor de la reportada en las series quir&uacute;rgicas. En el <a href="../img/revistas/rmc/v25n2/a1t4.jpg" target="_blank">cuadro IV</a> analizamos las variables predictoras de mortalidad a 30 d&iacute;as.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>CONCLUSI&Oacute;N</b></font></p>     <p align="justify"><font face="verdana" size="2">El cierre de la CIV post-IAM percut&aacute;nea primaria es una t&eacute;cnica prometedora que podr&iacute;a ofrecer una alternativa o un tratamiento adyuvante a la cirug&iacute;a. El tratamiento percut&aacute;neo de CIV permite el cierre inmediato despu&eacute;s de que se hace el diagn&oacute;stico, el cual podr&iacute;a conducir a la estabilizaci&oacute;n o la prevenci&oacute;n de un mayor deterioro. El oclusor septal auricular de Amplatzer es probablemente, en la mayor&iacute;a de los casos, el dispositivo m&aacute;s adecuado de los disponibles. Por el contrario, los pacientes con CIV post-IAM en fase aguda (menos de tres semanas despu&eacute;s del infarto) no son buenos candidatos para el cierre percut&aacute;neo, por lo menos con los dispositivos Amplatzer actuales que precisan un nuevo dise&ntilde;o. En la fase subaguda el fracaso severo del ventricular izquierdo y la disfunci&oacute;n multiorg&aacute;nica no permiten, a veces, la mejor&iacute;a cl&iacute;nica a pesar de que el resultado inmediato haya resultado satisfactorio.</font></p>     <p align="justify"><font face="verdana" size="2">A pesar de la t&eacute;cnica menos invasiva, la mortalidad de la CIV post-IAM sigue siendo alta, en particular para los pacientes con ShC. Otros desarrollos en dispositivos y t&eacute;cnicas de administraci&oacute;n se requieren con el fin de optimizar los resultados de intervenci&oacute;n. Adicionalmente, futuros estudios multic&eacute;ntricos identificar&aacute;n a los pacientes m&aacute;s adecuados para el cierre quir&uacute;rgico y/o intervencionista.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2"><b>REFERENCIAS</b></font></p>    <!-- ref --><p align="justify"><font face="verdana" size="2">1.	Topaz O, Taylor AL. Interventricular septal rupture complicating acute myocardial infarction: from pathophysiologic features to the role of invasive and noninvasive diagnostic modalities in current management. 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