<?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>S0188-21982014000300007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cierre percutáneo de fístula arteriovenosa pulmonar en una adolescente: Reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Transcatheter closure of pulmonary arteriovenous fistula in adolescent: Case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yáñez-Gutiérrez]]></surname>
<given-names><![CDATA[Lucelli]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Márquez-González]]></surname>
<given-names><![CDATA[Horacio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Gallegos]]></surname>
<given-names><![CDATA[Diana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cerrud-Sánchez]]></surname>
<given-names><![CDATA[Carmen E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Díaz]]></surname>
<given-names><![CDATA[Ángel E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Santos]]></surname>
<given-names><![CDATA[Moisés]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santiago-Hernández]]></surname>
<given-names><![CDATA[Jaime A]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Reyes]]></surname>
<given-names><![CDATA[Homero A]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[David-Gómez]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riera-Kinkel]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Cardiología Servicio de Cardiopatías Congénitas]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Cardiología Servicio de Tomografía]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Cardiología Servicio de Cardiología Intervencionista]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A04">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Cardiología Servicio de Cirugía Cardiotorácica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>25</volume>
<numero>3</numero>
<fpage>171</fpage>
<lpage>175</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-21982014000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-21982014000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-21982014000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las fístulas arteriovenosas, también llamadas malformaciones arteriovenosas pulmonares (MAVP), corresponden a un reducido grupo de patologías vasculares que en un 85% se originan de la comunicación de una arteria aferente con una vena eferente. Las congénitas son las menos frecuentes. Se presenta el caso de una adolescente de 13 años, asintomática, con soplo continuo y saturación periférica de 88%. Mediante estudios de imagen se corrobora la presencia de una fistula arteriovenosa a nivel pulmonar, que es cerrada por intervencionismo con dispositivo oclusor. Una vez tratado el defecto, la evolución de la paciente es satisfactoria. Conclusiones: Mediante el caso se abordan las herramientas clínicas y diagnósticas de las MAVP, así como las indicaciones de los modos terapéuticos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Arteriovenous fistulas also called pulmonary arteriovenous malformations (PAVM) are a small group of vascular pathologies in 85% originate from the communication afferent efferent artery to a vein. Congenital are less frequent. The case of a 13-year-old asymptomatic continuous murmur and peripheral saturation of 88% is presented. By imaging the presence of an arteriovenous fistula in the lung, which is closed by intervention with occluder device is corroborated. Once treated the defect, the evolution of the patient is satisfactory. Conclusions: Using the case of clinical and diagnostic tools MAVP addresses, and the particulars of the therapeutic modes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fístula arteriovenosa pulmonar]]></kwd>
<kwd lng="es"><![CDATA[cateterismo]]></kwd>
<kwd lng="es"><![CDATA[cierre percutáneo]]></kwd>
<kwd lng="en"><![CDATA[Pulmonary arteriovenous fistula]]></kwd>
<kwd lng="en"><![CDATA[catheterization]]></kwd>
<kwd lng="en"><![CDATA[percutaneous closure]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Caso cl&iacute;nico</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 de f&iacute;stula arteriovenosa pulmonar en una adolescente. Reporte de un caso</b></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="3"><b>Transcatheter closure of pulmonary arteriovenous fistula in adolescent. Case report</b></font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Lucelli Y&aacute;&ntilde;ez-Guti&eacute;rrez,&#42; Horacio M&aacute;rquez-Gonz&aacute;lez,&#42; Diana L&oacute;pez-Gallegos,&#42; Carmen E Cerrud-S&aacute;nchez,&#42; &Aacute;ngel E Dom&iacute;nguez-D&iacute;az,&#42; Mois&eacute;s Jim&eacute;nez-Santos,&#42;&#42; Jaime A Santiago-Hern&aacute;ndez,&#42;&#42;&#42; Homero A Ram&iacute;rez-Reyes,&#42;&#42;&#42; Felipe David-G&oacute;mez,&#42; Carlos Riera-Kinkel&#42;&#42;&#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; Servicio de Cardiopat&iacute;as Cong&eacute;nitas.    <br>&#42;&#42; Servicio de Tomograf&iacute;a.    ]]></body>
<body><![CDATA[<br>&#42;&#42;&#42; Servicio de Cardiolog&iacute;a Intervencionista.    <br>&#42;&#42;&#42;&#42; Servicio de Cirug&iacute;a Cardiotor&aacute;cica.    <br>    <br>Hospital de Cardiolog&iacute;a, Centro M&eacute;dico Nacional "Siglo XXI".</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>Horacio M&aacute;rquez Gonz&aacute;lez</b>    <br>Avenida Cuauht&eacute;moc N&uacute;m. 330,    <br>Col. Doctores, 06720, Del. Cuauht&eacute;moc, M&eacute;xico, D.F.    <br>Tel: 56276900 ext: 2254    ]]></body>
<body><![CDATA[<br>E-mail: <a href="mailto:horaciomarquez84@hotmail.com" target="_blank">horaciomarquez84@hotmail.com</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">Las f&iacute;stulas arteriovenosas, tambi&eacute;n llamadas malformaciones arteriovenosas pulmonares (MAVP), corresponden a un reducido grupo de patolog&iacute;as vasculares que en un 85% se originan de la comunicaci&oacute;n de una arteria aferente con una vena eferente. Las cong&eacute;nitas son las menos frecuentes. Se presenta el caso de una adolescente de 13 a&ntilde;os, asintom&aacute;tica, con soplo continuo y saturaci&oacute;n perif&eacute;rica de 88%. Mediante estudios de imagen se corrobora la presencia de una fistula arteriovenosa a nivel pulmonar, que es cerrada por intervencionismo con dispositivo oclusor. Una vez tratado el defecto, la evoluci&oacute;n de la paciente es satisfactoria. <b>Conclusiones:</b> Mediante el caso se abordan las herramientas cl&iacute;nicas y diagn&oacute;sticas de las MAVP, as&iacute; como las indicaciones de los modos terap&eacute;uticos.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b>F&iacute;stula arteriovenosa pulmonar, cateterismo, cierre percut&aacute;neo.</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">Arteriovenous fistulas also called pulmonary arteriovenous malformations (PAVM) are a small group of vascular pathologies in 85% originate from the communication afferent efferent artery to a vein. Congenital are less frequent. The case of a 13-year-old asymptomatic continuous murmur and peripheral saturation of 88% is presented. By imaging the presence of an arteriovenous fistula in the lung, which is closed by intervention with occluder device is corroborated. Once treated the defect, the evolution of the patient is satisfactory. <b>Conclusions:</b> Using the case of clinical and diagnostic tools MAVP addresses, and the particulars of the therapeutic modes.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b>Pulmonary arteriovenous fistula, catheterization, percutaneous closure.</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">Las f&iacute;stulas arteriovenosas, tambi&eacute;n llamadas malformaciones arteriovenosas pulmonares (MAVP), corresponden a un reducido grupo de patolog&iacute;as vasculares que se originan de la comunicaci&oacute;n de una arteria aferente con una vena eferente en un 85% de los casos.<sup>1</sup></font></p>     <p align="justify"><font face="verdana" size="2">Su etiolog&iacute;a es cong&eacute;nita en 90% y casi el 85% de &eacute;stas se asocia con el s&iacute;ndrome Osler-Weber-Rendu (telangiectasia hemorr&aacute;gica hereditaria).<sup>2,3</sup> El resto -10% aproximadamente- suele ser secundario a trauma tor&aacute;cico, cirug&iacute;a de t&oacute;rax, cirrosis, c&aacute;ncer, estenosis mitral, infecciones, amiloidosis y embarazo, entre otras.<sup>4-6</sup></font></p>     <p align="justify"><font face="verdana" size="2">M&aacute;s de la mitad de los pacientes cursan asintom&aacute;ticos, cerca del 40% tienen manifestaciones neurol&oacute;gicas<sup>7</sup> (eventos cerebrovasculares, cefaleas y crisis convulsivas) y s&oacute;lo el 10% refiere disnea y cianosis.<sup>8</sup> Las comorbilidades se presentan en 60% de los pacientes y cuando &eacute;stas no son tratadas, la mortalidad puede ascender del 26 al 50%.</font></p>     <p align="justify"><font face="verdana" size="2">Debido a su baja frecuencia -1 en 5,000 a 10,000 pacientes<sup>9</sup>- el diagn&oacute;stico de esta entidad representa un reto diagn&oacute;stico para el m&eacute;dico; por tanto, el reporte de casos cl&iacute;nicos facilita el conocimiento de los s&iacute;ntomas y signos que se presentan en la pr&aacute;ctica diaria, lo que puede facilitar el diagn&oacute;stico y tratamiento oportunos.</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>REPORTE DE CASO</b></font></p>     <p align="justify"><font face="verdana" size="2">Asistimos en el servicio de Cardiopat&iacute;as Cong&eacute;nitas a una adolescente de 13 a&ntilde;os, asintom&aacute;tica, soplo continuo dorsal, suave, segundo ruido normal, sin visceromegalias, sin acropaquias, saturaci&oacute;n perif&eacute;rica de 88%. En la radiograf&iacute;a de t&oacute;rax se demostr&oacute; una imagen hiperdensa parahiliar izquierda (<a href="#a7f1" target="_self">Figura 1</a>).</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    ]]></body>
<body><![CDATA[<p><a name="a7f1"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n3/a7f1.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     <p align="justify"><font face="verdana" size="2">El ecocardiograma transtor&aacute;cico mostr&oacute; dilataci&oacute;n de ventr&iacute;culo izquierdo con funci&oacute;n sist&oacute;lica y diast&oacute;lica conservada; no se observaron defectos septales interatriales, ni interventriculares. La presi&oacute;n de arteria pulmonar fue de 30 mmHg y el arco a&oacute;rtico izquierdo sin patolog&iacute;a.</font></p>     <p align="justify"><font face="verdana" size="2">Se realiz&oacute; angiotomograf&iacute;a que demostr&oacute; en corte axial imagen redondeada parahiliar izquierda que realza intensamente en forma precoz. Las reconstrucciones coronal y sagital mostraron imagen compatible con f&iacute;stula arteriovenosa con afluente arterial, aneurisma venoso interpuesto y drenaje venoso a vena pulmonar izquierda (<a href="#a7f2" target="_self">Figura 2</a>).</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a7f2"></a></p>    <p>&nbsp;</p>    ]]></body>
<body><![CDATA[<p align="center"><img src="../img/revistas/rmc/v25n3/a7f2.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></font></p>     <p align="justify"><font face="verdana" size="2">El cateterismo cardiaco confirm&oacute; la presencia de cortocircuito a nivel pulmonar con Qp/Qs de 2.3, y mediante angiograf&iacute;a selectiva de la f&iacute;stula se demostr&oacute; la malformaci&oacute;n vascular. Se decidi&oacute; embolizaci&oacute;n con dispositivo oclusor Amplatzer Vascular Plug (Figuras <a href="#a7f3" target="_self">3</a> y <a href="#a7f4" target="_self">4</a>) debido al di&aacute;metro del afluente arterial. A las dos horas del procedimiento hubo incremento de la saturaci&oacute;n a 95% y a las 24 horas la paciente fue dada de alta. A seis meses del procedimiento se mantiene asintom&aacute;tica y con saturaci&oacute;n perif&eacute;rica del 95%.</font></p>     <p align="justify"><font face="verdana" size="2"></font></p>    <p><a name="a7f3"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n3/a7f3.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"> </font></p>    ]]></body>
<body><![CDATA[<p><a name="a7f4"></a></p>    <p>&nbsp;</p>    <p align="center"><img src="../img/revistas/rmc/v25n3/a7f4.jpg"></p>    <p>&nbsp;</p>    <p><font size="2" face="Verdana"></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>DISCUSI&Oacute;N</b></font></p>     <p align="justify"><font face="verdana" size="2">Embriol&oacute;gicamente las venas pulmonares derivan del plexo endod&eacute;rmico, mientras que las arterias se originan del sexto arco a&oacute;rtico. La teor&iacute;a de las MAVP de origen cong&eacute;nito se justifica en una incompleta formaci&oacute;n de los septos vasculares entre la circulaci&oacute;n arterial y venosa. Una diferencia de las malformaciones arteriovenosas sist&eacute;micas se basa en que usualmente se nutren por una sola arteria sin existencia de colaterales.<sup>10</sup> Lo m&aacute;s frecuente es que presenten una localizaci&oacute;n perif&eacute;rica en los l&oacute;bulos inferiores pulmonares.<sup>11</sup></font></p>     <p align="justify"><font face="verdana" size="2">Las manifestaciones cl&iacute;nicas van de la mano con la historia natural de la enfermedad: inicialmente, cuando el corto circuito es de izquierda a derecha, por lo general, no existen manifestaciones cl&iacute;nicas en esta etapa; posteriormente al incrementar la presi&oacute;n en el lecho venoso, la mezcla sangu&iacute;nea se realiza de derecha a izquierda presentando desaturaci&oacute;n y cuando la presi&oacute;n parcial de ox&iacute;geno es menor de 80 mmHg, se presenta cianosis central y perif&eacute;rica; si &eacute;sta es cr&oacute;nica, se manifiestan cambios morfol&oacute;gicos como los dedos en palillo de tambor. En una fase m&aacute;s avanzada, los mecanismos compensadores originan policitemia y dilataci&oacute;n de los lechos venosos, sobre todo en la vasculatura pulmonar. Entonces, alg&uacute;n evento de estr&eacute;s o traumatismo puede mostrar una ruptura manifiesta en hemoptisis o epistaxis y eventos cerebrovasculares o abscesos cerebrales de manera secundaria a la hiperviscosidad.<sup>12</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Para el abordaje diagn&oacute;stico pueden emplearse:</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Radiograf&iacute;a de t&oacute;rax: las alteraciones radiol&oacute;gicas pueden identificarse en el 98%. Las im&aacute;genes ovales entre 1 a 5 cm de di&aacute;metro o redondeadas en el tercio inferior de los l&oacute;bulos o unido a los vasos hiliares son las m&aacute;s frecuentes.<sup>13</sup> Presenta una sensibilidad del 92% y especificidad del 83%.<sup>14</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; La prueba de hiperoxia: se trata de una prueba funcional que eval&uacute;a si existe paso de sangre procedente del coraz&oacute;n derecho hacia las cavidades izquierdas sin pasar por el filtro pulmonar. Se somete al paciente a inspiraci&oacute;n de ox&iacute;geno por 15 a 20 minutos y se compara la saturaci&oacute;n inicial (SaO<sub>2</sub>) y la presi&oacute;n parcial de ox&iacute;geno (PaO<sub>2</sub>). Lo normal es que la fracci&oacute;n de la mezcla sea menor al 5% (normal SaO<sub>2</sub> &gt; 96%, PaO<sub>2</sub> &gt; 85%).<sup>15</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; Ecocardiograf&iacute;a contrastada: la administraci&oacute;n de microburbujas en un paciente sin defectos arteriovenosos muestra una limpieza del medio de contraste de la aur&iacute;cula derecha a la izquierda en un ciclo; cuando existen las MAVP, se presenta un retardo entre 3 a 5 ciclos cardiacos (9 a 15 segundos).<sup>16</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; Tomograf&iacute;a de alta resoluci&oacute;n: brinda informaci&oacute;n estructural fidedigna sobre el n&uacute;mero de conexiones y el calibre de las mismas y ofrece cortes en tercera dimensi&oacute;n. Es &uacute;til en el postquir&uacute;rgico para determinar el n&uacute;mero y el sitio de lesiones residuales.<sup>17</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; Resonancia magn&eacute;tica nuclear: no est&aacute; reportado que tenga mayores ventajas que la tomograf&iacute;a. La exactitud de esta prueba se ve limitada por el artefacto respiratorio.<sup>18</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; Arteriograf&iacute;a: es el est&aacute;ndar de oro para el diagn&oacute;stico de las MAVP, la informaci&oacute;n que ofrece es una correcta anatom&iacute;a (calibre, ubicaci&oacute;n y n&uacute;mero de lesiones) y funcionalidad (direcci&oacute;n del flujo y velocidad) tanto en el proceso diagn&oacute;stico como para evaluar la eficacia terap&eacute;utica de la oclusi&oacute;n.<sup>19</sup></font></p> </p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>TRATAMIENTO</b></font></p>     <p align="justify"><font face="verdana" size="2">Las indicaciones para el tratamiento son:<sup>20,21</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify">    <blockquote><font face="verdana" size="2">&bull; Lesiones de m&aacute;s de 3 mm de di&aacute;metro</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Relaci&oacute;n de flujos Qp/Qs  &gt; 1.5 por incremento del gasto pulmonar</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Antecedentes de evento cerebrovascular emb&oacute;lico</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Hemoptisis masiva</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Cianosis y deterioro de la clase funcional</font></p>     <p align="justify"><font face="verdana" size="2">Los defectos pueden corregirse de dos maneras:</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Quir&uacute;rgicamente: de forma tradicional se realizan de esta manera, ahora se limita a defectos grandes que involucren grandes segmentos pulmonares, ya que al ser un abordaje invasivo, las complicaciones postquir&uacute;rgicas son mayores y desafortunadamente no se garantiza el cierre total cuando son m&uacute;ltiples.<sup>22</sup></font></p>     <p align="justify"><font face="verdana" size="2">&bull; Percut&aacute;nea: se garantiza el cierre por aplicaci&oacute;n de dispositivos oclusores de diversos tama&ntilde;os seg&uacute;n el defecto, as&iacute; se prefiere usar <i>coils</i> para defectos peque&ntilde;os y <i>plugs</i> vasculares de diferentes tama&ntilde;os seg&uacute;n el tama&ntilde;o de la f&iacute;stula, lo cual garantiza el cierre inmediato hasta en el 97% de los casos, aunque se han reportado cierres progresivos en tres meses.<sup>23</sup> El porcentaje de recidivas es menor al 5%.<sup>24</sup> </blockquote> El caso que se presenta con fines did&aacute;cticos muestra la evoluci&oacute;n habitual en pacientes mayores. Las im&aacute;genes muestran claramente el defecto vascular y la mejor&iacute;a con la intervenci&oacute;n quir&uacute;rgica.</p>     <p align="justify"><font face="verdana" size="2"></font></p>    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">  <b>CONCLUSIONES</b></font></p>     <p align="justify">    <blockquote><font face="verdana" size="2">&bull; Las MAVP cong&eacute;nitas son la forma menos frecuentes de presentaci&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2">&bull; La presentaci&oacute;n cl&iacute;nica habitualmente depende de la edad.</font></p>     <p align="justify"><font face="verdana" size="2">&bull; Los estudios de gabinete son la mejor herramienta diagn&oacute;stica.</font></p>     <p align="justify"><font face="verdana" size="2">&bull; El tratamiento actual recomendado es el intervencionismo. </font></blockquote></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. 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Wingen M, Gunther RW. Transcatheter embolization of pulmonary arteriovenous fistulas. <i>Rofo Fortschr Geb Rontgenstr Neuen Bildgeb Verfahr</i>. 2001; 173: 606-611.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7716948&pid=S0188-2198201400030000700023&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">24. Hepburn J, Dauphinee JA. Successful removal of hemangioma of the lung followed by disappearance of polycythemia. <i>Am J Med Sci</i>. 1942; 204: 681-685.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7716950&pid=S0188-2198201400030000700024&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></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">      ]]></body>
<body><![CDATA[<br> <b>Nota</b>     <br>      <br> Todos los autores colaboraron en: idea original, seguimiento, b&uacute;squeda de bibliograf&iacute;a, redacci&oacute;n y aprobaci&oacute;n de la &uacute;ltima versi&oacute;n del manuscrito.     <br>      <br> </font></p>    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>    <p align="justify"><font face="verdana" size="2">      <br>      <br> Este art&iacute;culo puede ser consultado en versi&oacute;n completa en: <a href="http://www.medigraphic.com/revmexcardiol" target="_blank">http://<b>www.medigraphic.com/revmexcardiol</b></a></font></p>       ]]></body><back>
<ref-list>
<ref id="B1">
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<person-group person-group-type="author">
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<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Maynar]]></surname>
<given-names><![CDATA[M]]></given-names>
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