<?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>1688-423X</journal-id>
<journal-title><![CDATA[Archivos de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[Arch Med Int]]></abbrev-journal-title>
<issn>1688-423X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad de Medicina Interna del Uruguay]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-423X2009000100008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Disección espontánea de carótida interna como causa de accidente cerebrovascular isquémico en el joven]]></article-title>
<article-title xml:lang="en"><![CDATA[Spontaneous internal carotid artery dissection as a cause of ischemic stroke in the young]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silvariño]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mérola]]></surname>
<given-names><![CDATA[Valentina]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Firpo]]></surname>
<given-names><![CDATA[Mariana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pino]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fraga]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tafuri]]></surname>
<given-names><![CDATA[Josefina]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alonso]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de la República (UdelaR) Facultad de Medicina Clínica Médica]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2009</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>37</fpage>
<lpage>39</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-423X2009000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-423X2009000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-423X2009000100008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El accidente cerebrovascular (ACV) isquémico en el paciente joven es inhabitual. La disección espontánea de arterias cervicales (DEAC) es una causa reconocida de ACV en el joven. Se presenta un caso clínico de ACV isquémico secundario a disección espontánea de arteria carótida interna y se actualizan aspectos vinculados a su prevalencia, factores de riesgo y tratamiento médico. Se enfatiza la frecuencia de DEAC como causa de ACV isquémico en el joven, el rol de la arteriografía diagnóstica en el estudio del ACV en esta franja etaria, la asociación de DEAC con factores trombofílicos congénitos y adquiridos, y la necesidad de individualizar la indicación de anticoagulación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Ischemic strokes are unusual in young individuals. Spontaneous dissection (SD) of the cervical carotid arteries (CA) is a known cause of stroke in the young. The present paper reports a clinical case of ischemic stroke secondary to the spontaneous dissection of the internal carotid artery (ICA), updating its prevalence, risk factors and medical treatment. The frequency of the SDCA is highlighted as a cause of ischemic stroke in the young and discusses the role of diagnostic arteriography in the evaluation of stroke in this age group, the association of SDCA with congenital and acquired thrombolythic factors, as well as the need to tailor anticoagulation therapy]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Accidente cerebrovascular en el joven]]></kwd>
<kwd lng="es"><![CDATA[Disección espontánea de arterias cervicales]]></kwd>
<kwd lng="es"><![CDATA[Disección espontánea de carótida]]></kwd>
<kwd lng="en"><![CDATA[Strokes in the young]]></kwd>
<kwd lng="en"><![CDATA[Cervical Arteries Spontaneous Dissection]]></kwd>
<kwd lng="en"><![CDATA[Carotid Artery Spontaneous Dissection]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p style="margin-bottom: 0cm;" align="left"></p>      <p style="margin-bottom: 0cm;" align="left"> <font size="2" face="Verdana" color="#000000">&copy; Prensa M&eacute;dica Latinoamericana. 2009 ISSN 0250-3816 - Printed in Uruguay - All rights reserved.</font></p>      <p style="margin-bottom: 0cm;" align="left"><font face="Verdana" size="2">    <br>  </font>  </p>      <div style="text-align: left;"><font size="2" face="Verdana" color="#000000"><b>Casu&iacute;stica de inter&eacute;s</b></font></div>      <div style="text-align: left;"><font face="Verdana" size="2">    <br>    </font>  </div>      <p style="margin-bottom: 0cm; text-align: center;"> <font face="Verdana" color="#000000" style="font-size: 13pt"><i><b>Disecci&oacute;n espont&aacute;nea de car&oacute;tida interna como causa de accidente cerebrovascular isqu&eacute;mico en el joven</b></i></font></p>      <div style="text-align: left;"></div>      <p style="margin-bottom: 0cm; text-align: center;"> <font size="3" face="Verdana" color="#000000"><b>Spontaneous internal carotid artery dissection as a cause of ischemic stroke in the young</b></font></p>      ]]></body>
<body><![CDATA[<p style="margin-bottom: 0cm; text-align: center;">&nbsp;</p>      <div style="text-align: left;"></div>      <p style="margin-bottom: 0cm; text-align: left;"></p>      <div style="text-align: left;"></div>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dr. Ricardo Silvari&ntilde;o</b>    <br>  Asistente de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dra. Valentina M&eacute;rola</b>    <br>  Residente de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dra. Mariana Firpo</b>    <br>  Residente de Cl&iacute;nica M&eacute;dica. Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      ]]></body>
<body><![CDATA[<p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dra. Andrea Pino</b>    <br>  Asistente de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dra. Laura Fraga</b>    <br>  Asistente de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dra. Josefina Tafuri</b>    <br>  Postgrado de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>Dr. Juan Alonso</b>    <br>  Profesor Agregado de Cl&iacute;nica M&eacute;dica.&nbsp;Facultad de Medicina. UdelaR.&nbsp;Montevideo</font></p>  <font face="Verdana" size="2">      <br>  </font>      <p style="margin-bottom: 0cm;" align="left"> <font size="2" face="Verdana" color="#000000">Recibido: 10.06.08 - Aceptado: 14.10.08    ]]></body>
<body><![CDATA[<br>  Trabajo de la Cl&iacute;nica M&eacute;dica C, Hospital de Cl&iacute;nicas, Facultad de Medicina, UdelaR. Montevideo.    <br>  <b>Correspondencia: Dr. Ricardo Silvari&ntilde;o, Cl&iacute;nica M&eacute;dica C, Hospital de Cl&iacute;nicas, Av Italia s/n y Las Heras, Tel/fax 4878702. <a href="mailto:anima@adinet.com.uy">anima@adinet.com.uy</a></b></font></p>  <font face="Verdana" size="2">      <br>  </font>      <p style="margin-bottom: 0cm;" align="left"><font face="Verdana" size="2">    <br>      <br>  </font>  <!-- big --><!-- big --><font face="Verdana" size="2">    <br>  </font>  <small><small><font style="font-size: 9pt;" size="2"><small> <font color="#000000" face="Verdana"><!-- big --><b>RESUMEN</b><!-- /big --></font></small></font></small></small><!-- /big --><!-- /big --><font face="Verdana" size="2"> </font> </p>      <p style="margin-bottom: 0cm; font-family: Arial;" align="left"> <font face="Verdana" color="#000000" size="2">El accidente cerebrovascular (ACV) isqu&eacute;mico en el paciente joven es inhabitual. La disecci&oacute;n espont&aacute;nea de arterias cervicales (DEAC) es una causa reconocida de ACV en el joven. Se presenta un caso cl&iacute;nico de ACV isqu&eacute;mico secundario a disecci&oacute;n espont&aacute;nea de arteria car&oacute;tida interna y se actualizan aspectos vinculados a su prevalencia, factores de riesgo y tratamiento m&eacute;dico. Se enfatiza la frecuencia de DEAC como causa de ACV isqu&eacute;mico en el joven, el rol de la arteriograf&iacute;a diagn&oacute;stica en el estudio del ACV en esta franja etaria, la asociaci&oacute;n de DEAC con factores trombof&iacute;licos cong&eacute;nitos y adquiridos, y</font><font face="Verdana" style="font-size: 9pt" size="2" color="#000000"><!-- big --> <font size="2">la necesidad de individualizar la indicaci&oacute;n de anticoagulaci&oacute;</font><!-- big --><small><font size="2">n</font>.</small><font size="2"> </font> <!-- /big --><!-- /big --></font> </p>      <p style="margin-bottom: 0cm; font-family: Verdana;" align="left"> <font style="font-size: 10pt;" size="2" color="#000000"><span style="font-weight: bold;">Palabras Clave:</span> Accidente cerebrovascular en el joven; Disecci&oacute;n espont&aacute;nea de arterias cervicales; Disecci&oacute;n espont&aacute;nea de car&oacute;tida.</font></p>  <font face="Verdana" size="2">      <br>  </font>      ]]></body>
<body><![CDATA[<p style="margin-bottom: 0cm; font-family: Verdana;" align="left"> <font style="font-size: 10pt;" size="2" color="#000000"><b>SUMMARY    <br>  </b>Ischemic strokes are unusual in young individuals. Spontaneous dissection (SD) of the cervical carotid arteries (CA) is a known cause of stroke in the young. The present paper reports a clinical case of ischemic stroke secondary to the spontaneous dissection of the internal carotid artery (ICA), updating its prevalence, risk factors and medical treatment. The frequency of the SDCA is highlighted as a cause of ischemic stroke in the young and discusses the role of diagnostic arteriography in the evaluation of stroke in this age group, the association of SDCA with congenital and acquired thrombolythic factors, as well as the need to tailor anticoagulation therapy.</font></p>      <p style="margin-bottom: 0cm; font-family: Arial;" align="left"> <font face="Verdana"><small> <font style="font-size: 10pt;font-weight:bold" size="2" color="#000000">Keywords:</font></small><font style="font-size: 10pt;" size="2" color="#000000"> Strokes in the young. Cervical Arteries Spontaneous Dissection. Carotid Artery Spontaneous Dissection.&nbsp;</font></font></p>      <p style="margin-bottom: 0cm;" align="left"></p>      <p style="margin-bottom: 0cm;" align="left"></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>INTRODUCCI&Oacute;N</b></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000">El ACV isqu&eacute;mico en el paciente joven menor de 45 a&ntilde;os, es inhabitual, constituyendo un 5 a 10% del total de los ACV isqu&eacute;micos seg&uacute;n las diferentes series. La Disecci&oacute;n arterial espont&aacute;nea consiste en la rotura de la capa &iacute;ntima del vaso con la consecuente entrada de sangre hacia el espacio sub&iacute;ntimomedial o m&aacute;s raramente subadventicial. La DEAC es una causa reconocida de ACV isqu&eacute;mico en el paciente joven con incidencia y prevalencia variable seg&uacute;n la serie analizada. La arteria Car&oacute;tida Interna es la localizaci&oacute;n m&aacute;s frecuente, generalmente a 2-5 cm distal a la bifurcaci&oacute;n. La disecci&oacute;n puede vincularse a un traumatismo de entidad variable o bien ocurrir de forma espont&aacute;nea. Las manifestaciones cl&iacute;nicas pueden ser variables y se atribuyen a compromiso de estructuras locales (Sindrome de Horner, dolor en cuello y cara, par&aacute;lisis de pares craneanos ipsilaterales) y a isquemia cerebral o retiniana (Accidente Isqu&eacute;mico Transitorio &ndash;AIT- , infarto).</font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000"><b>    <br>  OBJETIVO</b>    <br>  Presentar un caso cl&iacute;nico de ACV en el Joven vinculado a Disecci&oacute;n Espont&aacute;nea de Arteria Car&oacute;tida Interna y actualizar aspectos vinculados a su prevalencia, factores de riesgo y tratamiento m&eacute;dico. </font> </p>      ]]></body>
<body><![CDATA[<p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000" size="2"><b>CASO CL&Iacute;NICO</b>    <br>  Sexo femenino, 22 a&ntilde;os, procedente de medio urbano, diestra, educaci&oacute;n primaria completa. Antecedente de migra&ntilde;a de larga data, sin cefalea durante los &uacute;ltimos meses. Destaca en lo ginecobst&eacute;trico el consumo de anticonceptivos orales (ACO) combinados y de baja dosis hasta hace tres meses en que se inicia administraci&oacute;n de anticonceptivos combinados por v&iacute;a intramuscular mensual. Dos gestas, dos ces&aacute;reas, con nacidos vivos sin complicaciones neonatales; niega historia de aborto espont&aacute;neo. Quince d&iacute;as previos a la consulta instala en forma brusca s&iacute;ndrome focal neurol&oacute;gico caracterizado por hemiplejia izquierda total y disartria par&eacute;tica; precediendo al mismo cefalea de predominio en hemicr&aacute;neo derecho. Se inicia valoraci&oacute;n en centro de segundo nivel y se env&iacute;a en la evoluci&oacute;n para completar la misma en centro de referencia. Se realiza Tomograf&iacute;a Computada (TC) de cr&aacute;neo que informa imagen compatible con ACV isqu&eacute;mico de territorio silviano derecho (<a href="#figura_1">Figura 1</a>). Se completa valoraci&oacute;n con Resonancia Nuclear Magn&eacute;tica (RNM) que evidencia infarto isqu&eacute;mico en etapa subaguda en territorio superficial y profundo de arteria cerebral media (ACM) derecha, asocia imagen compatible con trombosis de la ACM. El electrocardiograma (ECG) evidencia un ritmo sinusal (<a href="#figura_2">Figura 2</a>), con frecuencia de 75 latidos por minuto, P y P-R normales, ventriculograf&iacute;a normal. El Ecocardiograma transtor&aacute;cico no evidenci&oacute; alteraciones anat&oacute;micas ni trombos en cavidades cardiacas, la Fracci&oacute;n de Eyecci&oacute;n del Ventr&iacute;culo Izquierdo fue de 65%. El Eco Doppler de vasos de cuello informa oclusi&oacute;n de car&oacute;tida interna derecha de reciente evoluci&oacute;n. Arteriograf&iacute;a de cuatro vasos de cuello evidencia disecci&oacute;n de car&oacute;tida interna derecha en el origen y oclusi&oacute;n de ACM derecha en el origen (<a href="#figura_3">Figura 3</a>). De la anal&iacute;tica de laboratorio general destaca hemograma, hepatograma, azoemia y creatininemia normales. HIV y VDRL no reactivos. Velocidad de Eritrosedimentaci&oacute;n 4 mm en la primera hora. De la valoraci&oacute;n de factores de riesgo cardiovascular destaca: Lipidograma con colesterol total de 200 mg/dl, LDL 128 mg/dl y HDL 49 mg/ dl. Glicemia y uricemia normales. Del estudio de la crasis y factores protromb&oacute;ticos destaca: Tiempo de protrombina de 85%, KPTT 27 segundos, Fibrin&oacute;geno 321 mg/dl. Factor V </font>  <font style="font-size: 10pt;" size="1" face="Verdana" color="#000000">Fig. 1. Tomograf&iacute;a de Cr&aacute;neo precoz. Destaca imagen compatible con signo de arteria cerebral media hiperdensa (flecha). Fig. 2. Resonancia Nuclear Magn&eacute;tica. Permite valorar imagen compatible con Infarto de territorio superficial y profundo de Arteria Cerebral Media. Fig. 3. Arteriograf&iacute;a de vasos de cuello. Permite visualizar imagen caracter&iacute;stica de disecci&oacute;n arterial (flecha). </font><font face="Verdana" color="#000000" size="2">de Leiden, variante termol&aacute;bil del gen Metiltetrahidrofolatoreductasa (MTHFR) y FII 20210A, ausentes. Anticuerpos antifosfolipidicos negativo. Del laboratorio de inmunolog&iacute;a destaca: Anticuerpos Antinucleares (ANA) 1/40.</font></p>      <p style="margin-bottom: 0cm;" align="left"><font face="Verdana" size="2"> <a name="figura_1"></a><img style="width: 424px; height: 517px;" alt="" src="/img/revistas/ami/v31n1/1a08f1.JPG"></font></p>  <font face="Verdana" size="2">      <br>  </font>      <p style="margin-bottom: 0cm;" align="left"><font face="Verdana" size="2"><a name="figura_2"></a><img style="width: 416px; height: 380px;" alt="" src="/img/revistas/ami/v31n1/1a08f2.JPG"></font></p>      <p style="margin-bottom: 0cm;" align="left"></p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" style="font-size: 10pt" size="2" color="#000000"><b><a name="figura_3"></a><img style="width: 406px; height: 721px;" alt="" src="/img/revistas/ami/v31n1/1a08f3.JPG"></b></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000" size="2"><b>DISCUSI&Oacute;N Y COMENTARIOS</b>    <br>  Estudios epidemiol&oacute;gicos ubican a la DEAC como responsable de 7,6 a 25% de los ACV en el paciente joven</font><font style="font-size: 10pt;" size="1" face="Verdana" color="#000000">(1)</font><font face="Verdana" color="#000000" size="2">, con una incidencia anual de de 2.5-3 cada 100.000 en estudios comunitarios y 1-1.5 cada 100.000 en series hospitalarias</font><font face="Verdana" style="font-size: 9pt" size="2" color="#000000"><font style="font-size: 10pt;" size="1">(<a href="#1">1</a>)</font><font face="Verdana" color="#000000" size="2">. Es m&aacute;s frecuente en el trayecto arterial extracraneano dado que este sector es m&aacute;s m&oacute;vil respecto al intracraneano</font><font style="font-size: 10pt;" size="1">(1.</font></font></p>     <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font style="font-size: 10pt;" size="1"><a name="1."></a><a href="#1">1</a>,<a name="2."></a><a href="#2">2</a>)</font><font size="2">. </font></font> </p>      ]]></body>
<body><![CDATA[<p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font size="2">La etiolog&iacute;a de la DEAC es vasta. Se mencionan factores gen&eacute;ticos o con asociaci&oacute;n familiar, entre los que destacan enfermedades del conectivo (Displasia fibromuscular, Sindrome de Ehlers&ndash;Danlos, S&iacute;ndrome de Marfan, Enfermedad renal poliqu&iacute;stica autos&oacute;mica dominante y osteogenesis imperfecta tipo I) responsables de 55 a 68% de los casos en algunas series</font><font style="font-size: 10pt;" size="1">(<a href="#2">2</a>)</font><font size="2">. Entre los portadores de displasia fibromuscular, 25 a 30% tienen compromiso de la circulaci&oacute;n cerebrovascular incluyendo car&oacute;tidas y arterias vertebrales</font><font style="font-size: 9pt;" size="2"><font style="font-size: 10pt;" size="1">(<a name="3."></a><a href="#3">3</a>)</font><font size="2">. En muchos pacientes sin patolog&iacute;a conocida del tejido conectivo, se encontraron componentes aberrantes del mismo en las biopsias de piel que parecen responder a una anomal&iacute;a molecular en la s&iacute;ntesis de matriz extracelular; este hallazgo sugiere que los pacientes con DEAC sufren un desconocido trastorno del tejido conectivo que predispone a debilidad estructural de la pared vascular y, por tanto, aumenta su riesgo de disecciones</font><font style="font-size: 10pt;" size="1">(<a name="4."></a><a href="#4">4</a>)</font><font size="2">. Se citan como factores gen&eacute;ticos vinculados a DEAC bajos niveles de alfa-1- ntitripsina en plasma</font><font style="font-size: 10pt;" size="1">(<a name="5."></a><a href="#5">5</a>)</font><font size="2">, genotipo homocigoto para el gen de la Metiltetrahidrofolatoreductasa (MTHR)</font><font style="font-size: 10pt;" size="1">(<a name="6."></a><a href="#6">6</a>,<a name="7."></a><a href="#7">7</a>,<a name="8."></a><a href="#8">8</a>) </font> <font size="2">y Factor V de Leyden</font><font style="font-size: 10pt;" size="1">(<a name="9."></a><a href="#9">9</a>)</font><font size="2">. </font> </font></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font size="2">Entre los trastornos adquiridos se hall&oacute; asociaci&oacute;n entre DEAC y niveles elevados de homociste&iacute;na plasm&aacute;tica</font><font style="font-size: 10pt;" size="1">(<a name="10."></a><a href="#10">10</a>,<a name="11."></a><a href="#11">11</a>)</font><font size="2">, migra&ntilde;a</font><font style="font-size: 9pt;" size="2"><font style="font-size: 10pt;" size="1">(<a name="12."></a><a href="#12">12</a>,<a name="13."></a><a href="13.">13</a>)</font><font size="2">, anormalidades vasculares como el cambio de di&aacute;metro (&gt;11,8 mm) de la arteria car&oacute;tida com&uacute;n durante el ciclo cardiaco y Anticuerpos antifosfol&iacute;pido (AAF)</font><font style="font-size: 10pt;" size="1">(<a name="14."></a><a href="#14">14</a>,<a name="15."></a><a href="#15">15</a>,<a name="16."></a><a href="#16">16</a>)</font><font size="2">. Respecto a la presencia de factores de riesgo cardiovascular cl&aacute;sicos (hipertensi&oacute;n arterial, dislipemia, obesidad, tabaquismo, diabetes) un an&aacute;lisis multivariado sugiere una relaci&oacute;n negativa entre con DEAC</font><font style="font-size: 10pt;" size="1">(<a href="#2">2</a>)</font><font size="2">. </font> </font></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font size="2">En lo que refiere a factores ambientales existe una d&eacute;bil asociaci&oacute;n entre infecci&oacute;n aguda (principalmente del tracto respiratorio) y DEAC comparado con casos control</font><font style="font-size: 10pt;" size="1">(17.</font></font></p>     <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font style="font-size: 10pt;" size="1"><a name="17."></a><a href="#17">17</a><a name="18."></a>,<a href="#18">18</a>)</font><font size="2">. Se hall&oacute; asociaci&oacute;n entre el consumo de anticonceptivos orales y DEAC</font><font style="font-size: 9pt;" size="2"><font style="font-size: 10pt;" size="1">(<a href="#2">2</a>)</font><font size="2">. </font> </font></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" color="#000000"><font size="2">En referencia a las manifestaciones cl&iacute;nicas, la tr&iacute;ada cl&aacute;sica de dolor en hemicr&aacute;neo, cara o cuello, Sindrome de Horner parcial e Isquemia retiniana o cerebral que aparece d&iacute;as despu&eacute;s (media 4 d&iacute;as), est&aacute; presente solo en un tercio de los casos. El hallazgo de dos de los tres componentes que la integran supone un fuerte diagn&oacute;stico de sospecha</font><font style="font-size: 10pt;" size="1">(<a href="#1">1</a>,<a href="#2">2</a>)</font><font size="2">. Vinculado al tratamiento m&eacute;dico, no hay estudios randomizados que comparen antiplaquetarios y anticoagulantes vs. control. Los estudios no randomizados no mostraron diferencias significativas entre una u otra opci&oacute;n, por lo que insisten en la necesidad de realizar estudios bien dise&ntilde;ados con tales fines</font><font style="font-size: 9pt;" size="2"><font style="font-size: 10pt;" size="1">(<a name="19."></a><a href="#19">19</a>)</font><font size="2">. Algunos autores<a name="20."></a></font><font style="font-size: 10pt;" size="1">(<a href="#20">20</a>) </font><font size="2">concuerdan en individualizar el tratamiento, sugiriendo la anticoagulaci&oacute;n inmediata frente al hallazgo de se&ntilde;ales hiperintensas transitorias en Arteria Cerebral Media detectadas por Doppler Transcraneano, presencia de oclusi&oacute;n/pseudoclusi&oacute;n del vaso disecado, reiteraci&oacute;n del Accidente Isqu&eacute;mico Transitorio/Stroke que afecte m&uacute;ltiples regiones de la misma circulaci&oacute;n y presencia de trombo m&oacute;vil en el vaso disecado. En contrapartida la presencia de un infarto extenso, no disponibilidad de neuroimagen, comorbilidad que eleve el riesgo de sangrado y circulaci&oacute;n colateral intracraneana insuficiente (valorada por arteriograf&iacute;a) desaconsejan la anticoagulaci&oacute;n inmediata. </font> </font></font> </p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000">En referencia al caso cl&iacute;nico analizado, el antecedente de migra&ntilde;a asociado a la utilizaci&oacute;n de anticonceptivos hormonales determin&oacute; orientar la estrategia diagn&oacute;stica hacia la confirmaci&oacute;n de una trombofilia. </font> </p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000">Se destaca la importancia de la realizaci&oacute;n de la arteriograf&iacute;a de vasos de cuello frente al hallazgo de oclusi&oacute;n carotidea en el estudio doppler cervical, lo que permiti&oacute; arribar al diagn&oacute;stico de disecci&oacute;n arterial. Confirmada la disecci&oacute;n espont&aacute;nea se continuo con la b&uacute;squeda de factores protromb&oacute;ticos dado la asociaci&oacute;n de &eacute;stos con DEAC (con y sin trombosis asociada) reportada en la literatura. </font> </p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" style="font-size: 10pt" size="2" color="#000000"><b>CONCLUSIONES</b></font></p>      <p style="margin-bottom: 0cm;" align="left"> <font style="font-size: 10pt;" size="2" face="Verdana" color="#000000">La DEAC es una causa frecuente de ACV isqu&eacute;mico en el paciente joven; esta frecuencia ratifica el rol de la arteriograf&iacute;a diagn&oacute;stica en el estudio del ACV isqu&eacute;mico de este grupo etario. Dado su asociaci&oacute;n con factores protromb&oacute;ticos cong&eacute;nitos y adquiridos es recomendable la b&uacute;squeda sistem&aacute;tica de los mismos en todos casos de DEAC. El tratamiento debe ser individualizado aconsej&aacute;ndose la anticoagulaci&oacute;n inmediata en las situaciones referidas. </font> </p>      <p style="margin-bottom: 0cm;" align="left"> <font face="Verdana" style="font-size: 10pt" size="2" color="#000000"><b>BIBLIOGRAF&Iacute;A</b></font></p>      ]]></body>
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