<?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>0120-8748</journal-id>
<journal-title><![CDATA[Acta Neurológica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Neurol Colomb.]]></abbrev-journal-title>
<issn>0120-8748</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Neurología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-87482014000100010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Síndrome de encefalopatía reversible posterior (PRES) asociada a eclampsia y síndrome HELLP]]></article-title>
<article-title xml:lang="en"><![CDATA[Posterior reversible encephalopathy syndrome (PRES) associated with eclampsia and HELLP syndrome]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aulestia B]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schroeder]]></surname>
<given-names><![CDATA[Natalia]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro G]]></surname>
<given-names><![CDATA[Gustavo H]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de La Sabana  ]]></institution>
<addr-line><![CDATA[Chia ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de La Sabana  ]]></institution>
<addr-line><![CDATA[Chia ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Fundación Universitaria Sanitas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2014</year>
</pub-date>
<volume>30</volume>
<numero>1</numero>
<fpage>63</fpage>
<lpage>67</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-87482014000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-87482014000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-87482014000100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Es un síndrome usualmente reversible consistente en cefalea, alteración del estado mental, convulsiones y pérdida de la visión, asociado a edema cerebral de localización predominantemente posterior en estudios de imagen (1). La falta de su reconocimiento y manejo temprano puede ocasionar daños neurológicos permanentes (2). Se presenta el caso de una paciente de 29 años con 36 semanas de edad gestacional que ingresa al servicio de urgencias en estado epiléptico por eclampsia, síndrome HELLP (Hemólisis, Enzimas hepáticas elevadas, Plaquetas bajas) e imágenes hipodensas en regiones occipital y frontal en Tomografía Axial Computarizada de cráneo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This syndrome, usually reversible, consists in symptoms like headache, altered mental status, seizures and lost of sight, associated to brain edema predominantly in posterior cerebral regions. The lack of its recognition and early management can lead to permanent neurological damage. It is presented the case of a 29 - year - old patient with 36 weeks of gestational age who arrives to the emergency room in epileptic status. She was diagnosed with eclampsia, HELLP (Hemolysis, elevated liver enzymes, low platelets) syndrome and occipital hypodense images were determined by cerebral Computarized Tomography.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Síndrome de Encefalopatía Reversible Posterior (PRES)]]></kwd>
<kwd lng="es"><![CDATA[Eclampsia]]></kwd>
<kwd lng="es"><![CDATA[Síndrome HELLP (Hemolysis, elevated liver enzymes, low platelets)]]></kwd>
<kwd lng="en"><![CDATA[Eclampsia]]></kwd>
<kwd lng="en"><![CDATA[Posterior Reversible Encephalopathy Syndrome (PRES)]]></kwd>
<kwd lng="en"><![CDATA[HELLP syndrome]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="verdana">     <p align="right">Caso cl&iacute;nico</p>      <p align="center"><font size="4"><b>S&iacute;ndrome de encefalopat&iacute;a reversible posterior (PRES) asociada a eclampsia y s&iacute;ndrome HELLP</b></font></p>      <p align="center"><font size="3"><b>posterior reversible encephalopathy syndrome (PRES) associated with eclampsia and HELLP syndrome</b></font></p>      <p align="center">Carolina Aulestia B<sup>1</sup>, Natalia Schroeder<sup>2</sup>, Gustavo H. Castro G<sup>3</sup>.</p>      <p><sup>1</sup> Residente Medicina Interna, Universidad de La Sabana, Chia, Colombia.    <br>  <sup>2</sup> Neur&oacute;loga, Cl&iacute;nica Universidad de La Sabana. Chia, Colombia.    <br>  <sup>3</sup> Neur&oacute;logo Vascular Epilepsia y Sue&ntilde;o, Fundaci&oacute;n Universitaria Sanitas. Bogot&aacute;, Colombia.    <br> Correspondencia: <a href="mailto:caulestia@hotmail.com">caulestia@hotmail.com</a></p>      <p>(Carolina Aulestia B, Natalia Schroeder, Gustavo h. Castro G. S&iacute;ndrome de encefalopat&iacute;a reversible posterior (preS) asociada a eclampsia y s&iacute;ndrome de hellp. Acta Neurol Colomb 2014;30:32-63-67).</p>      ]]></body>
<body><![CDATA[<p>(Carolina Aulestia B, Natalia Schroeder, Gustavo h. Castro G. posterior reversible encephalopathy syndrome (preS) associated with eclampsia and hellp syndrome. Acta Neurol Colomb 2014;30:32-63-67).</p>      <p align="center">Recibido: 12/07/13. revisado: 15/08/13. Aceptado: 15/01/14.</p>  <hr>      <p><b>Resumen</b></p>      <p>Es un s&iacute;ndrome usualmente reversible consistente en cefalea, alteraci&oacute;n del estado mental, convulsiones y p&eacute;rdida de la visi&oacute;n, asociado a edema cerebral de localizaci&oacute;n predominantemente posterior en estudios de imagen (1). La falta de su reconocimiento y manejo temprano puede ocasionar da&ntilde;os neurol&oacute;gicos permanentes (2).</p>      <p>Se presenta el caso de una paciente de 29 a&ntilde;os con 36 semanas de edad gestacional que ingresa al servicio de urgencias en estado epil&eacute;ptico por eclampsia, s&iacute;ndrome HELLP (Hem&oacute;lisis, Enzimas hep&aacute;ticas elevadas, Plaquetas bajas) e im&aacute;genes hipodensas en regiones occipital y frontal en Tomograf&iacute;a Axial Computarizada de cr&aacute;neo.</p>      <p><b>Palabras clave.</b> S&iacute;ndrome de Encefalopat&iacute;a Reversible Posterior (PRES), Eclampsia, S&iacute;ndrome HELLP (Hemolysis, elevated liver enzymes, low platelets) (DeCS).</p>  <hr>      <p><b>Summary</b></p>      <p>This syndrome, usually reversible, consists in symptoms like headache, altered mental status, seizures and lost of sight, associated to brain edema predominantly in posterior cerebral regions. The lack of its recognition and early management can lead to permanent neurological damage.</p>      <p>It is presented the case of a 29 - year - old patient with 36 weeks of gestational age who arrives to the emergency room in epileptic status. She was diagnosed with eclampsia, HELLP (Hemolysis, elevated liver enzymes, low platelets) syndrome and occipital hypodense images were determined by cerebral Computarized Tomography.</p>      <p><b>Key words:</b> Eclampsia, Posterior Reversible Encephalopathy Syndrome (PRES), HELLP syndrome (MeSH).</p>  <hr>      ]]></body>
<body><![CDATA[<p><font size="3"><b>Introducci&oacute;n</b></font></p>      <p>Descrito por primera vez en 1996 por Hinchey y colaboradores (1), bajo el nombre de "Leucoencefalopat&iacute;a posterior reversible", el s&iacute;ndrome de encefalopat&iacute;a reversible posterior (PRES, por sus sigla en ingl&eacute;s Posterior Reversible Encephalopathy Syndrome), actualmente se reconoce como un cuadro secundario a crisis hipertensiva en adultos, al uso de medicaci&oacute;n inmunosupresora, a la enfermedad renal, la enfermedad autoinmune, el tratamiento del c&aacute;ncer, los transplantes y a complicaciones obst&eacute;tricas como la preeclampsia y la eclampsia; tambi&eacute;n se ha asociado a cuadros de infecci&oacute;n, sepsis y choque (1-5). Cursa con cefalea, alteraci&oacute;n del estado mental, convulsiones y p&eacute;rdida de la visi&oacute;n, asociado a edema cerebral de localizaci&oacute;n predominantemente posterior en estudios de imagen (1).</p>      <p><b>presentaci&oacute;n del caso</b></p>      <p>Paciente femenina de 29 a&ntilde;os, 36 semanas de edad gestacional, remitida de otra instituci&oacute;n en <i>estatus epilepticus</i>. Al ingreso se administr&oacute; sedaci&oacute;n, se procedi&oacute; a intubaci&oacute;n orotraqueal exitosa, se registraron signos vitales: TA: 156/112, FC: 92l/min, se ventil&oacute; con amb&uacute;, con Sat O2 92%. Con hiperreflexia como hallazgo significativo al examen f&iacute;sico. Feto &uacute;nico, cef&aacute;lico, FCF: 190l/min.</p>      <p>Laboratorios: CH: leucocitos 10190, N: 87.2%, Hb: 11.8, Hto: 36.5%, Plaquetas: 48200; LDH: 2637U/L, PT 15 (c12.2), INR 1.24; PTT 30 (c25.3); TGP 166, TGo 253U/L. Se diagnostic&oacute; s&iacute;ndrome HELLP y eclampsia. Se realiz&oacute; ces&aacute;rea de emergencia, se controlaron las cifras tensionales con labetalol y se administr&oacute; sulfato de magnesio. Se traslad&oacute; a la paciente a UCI (<a href="#fig1">Figura 1</a>).</p>      <p align="center"><a href="#fig1"></a><img src="img/revistas/anco/v30n1/v30n1a10f1.jpg"></p>      <p>Se sospecharon infartos cerebrales con consecuencias neurol&oacute;gicas asociadas al sitio de localizaci&oacute;n.</p>      <p>La paciente permaneci&oacute; sedada 3 d&iacute;as, se disminuy&oacute; la sedaci&oacute;n peri&oacute;dicamente, sin encontrar d&eacute;ficit neurol&oacute;gico. Se controlaron las cifras tensionales. Se logr&oacute; extubaci&oacute;n exitosa. Se normalizaron los dem&aacute;s par&aacute;metros de laboratorio. La paciente fue dada de alta en perfectas condiciones neurol&oacute;gicas. Lo mismo se evidenci&oacute; en controles posteriores, cl&iacute;nica y radiol&oacute;gicamente (Resonancia Magn&eacute;tica cerebral reportada como normal al mes del evento. No se dispone de las im&aacute;genes).</p>      <p><font size="3"><b>Discusi&oacute;n</b></font></p>      <p>Los casos de PRES no son frecuentes y menos asociados a s&iacute;ndrome HELLP. En una b&uacute;squeda realizada en la base de datos de PubMed usando como palabras clave "PRES" y "HELLP syndrome", as&iacute; como "Posterior Leukoencephalopaty" y "HELLP syndrome", sin l&iacute;mites, s&oacute;lo se encontraron 7 art&iacute;culos relacionados (2,6-11).</p>      ]]></body>
<body><![CDATA[<p>Esta encefalopat&iacute;a se caracteriz&oacute; por edema cerebral reversible localizado en otras regiones parietales posteriores y occipital (1). Sin embargo ahora se sabe que se puede ver en otras regiones con edema focal, sim&eacute;trico en ambos hemisferios cerebrales, que si bien es de predominancia posterior como se mencion&oacute; en su descripci&oacute;n inicial; los siguientes sitios afectados son los l&oacute;bulos frontales, la uni&oacute;n temporooccipital inferior y el cerebelo, en ese orden (4), tambi&eacute;n puede afectar otras regiones como tallo encef&aacute;lico y ganglios basales (12). Tambi&eacute;n se sabe que puede estar involucrada la corteza, el tejido subcortical y materia blanca profunda en diferentes grados (4).</p>      <p>El mayor compromiso en regi&oacute;n posterior del cerebro puede deberse, seg&uacute;n algunos autores, a la diferencia en la inervaci&oacute;n simp&aacute;tica respecto a la regi&oacute;n anterior, en donde es m&aacute;s abundante, lo cual confiere mejores condiciones de protecci&oacute;n en caso de aumentos marcados de la tensi&oacute;n arterial (13-15). En el caso de nuestra paciente el compromiso no fue solo posterior si no tambi&eacute;n frontal.</p>      <p>Se han mencionado ya las causas m&aacute;s frecuentemente asociadas, pero cabe destacar que la presi&oacute;n elevada (moderada-severa) se ha observado en aproximadamente 70-80% de los pacientes, aunque en 25-30% esta condici&oacute;n ha estado ausente (4,12).</p>      <p>Es importante conocer adem&aacute;s que su caracter&iacute;stica de "reversible", se cumple solo si se act&uacute;a de manera oportuna tratando la causa desencadenante (16,17). Un estudio multic&eacute;ntrico demostr&oacute; que la reversibilidad era significativamente menor en el tronco cerebral (44%) y en la materia blanca profunda (47%) comparado con las &aacute;reas corticales y subcorticales (76-91%). La reversibilidad fue mayor en el grupo con eclampsia, seguida de los grupos de hipertensi&oacute;n y quimioterapia (3).</p>      <p>El proceso fisiopatol&oacute;gico del PRES es controversial (4). El edema encontrado es predominantemente vasog&eacute;nico, secundario a un incremento en la presi&oacute;n arterial sist&eacute;mica que excede los mecanismos de autoregulaci&oacute;n cerebrovascular, lo cual resulta en la disfunci&oacute;n de la barrera hematoencef&aacute;lica y en el consiguiente escape de l&iacute;quido al intersticio (1,14,1518). Esta ser&iacute;a una caracter&iacute;stica compartida con la encefalopat&iacute;a hipertensiva, pero como se mencion&oacute;, no en todos los casos se encuentra una elevaci&oacute;n de la tensi&oacute;n arterial.</p>      <p>Por otro lado, autores como Covarrubias (16), proponen que el edema vasog&eacute;nico severo puede progresar a edema citot&oacute;xico (edema de los elementos celulares ) y que el uso de im&aacute;genes de difusi&oacute;n por Resonancia Magn&eacute;tica (diffusion-weighted MR) permitir&iacute;an predecir dicha progresi&oacute;n y, por lo tanto, infarto cerebral irreversible. Sin embargo esto &uacute;ltimo fue puesto en duda posteriormente por Pande et al (3), quienes encontraron limitaciones en el uso de esta t&eacute;cnica con tal prop&oacute;sito.</p>      <p>Puntualmente, respecto a los s&iacute;ndromes hipertensivos del embarazo, hay que recordar que la preeclampsia se desarrolla en aproximadamente 5% de los embarazos y eclampsia en 1 de cada 3000 nacimientos a pesar de estar con manejo adecuado. La eclampsia se puede presentar antes del parto en 50% de las pacientes, intraparto 25% y hasta 48 horas despu&eacute;s del parto 25% (19,20). Ambas entidades figuran dentro de las tres causas principales de muerte en el embarazo (7).</p>      <p>La asociaci&oacute;n de PRES y preeclampsia o eclampsia est&aacute; bien establecida (4). De hecho, Zeeman et al (14) y otros autores, han sugerido que el PRES es la lesi&oacute;n cerebral primaria en la eclampsia.</p>      <p>Con respecto al proceso fisiopatol&oacute;gico ya mencionado, en estos s&iacute;ndromes se suma la alteraci&oacute;n de la reactividad vascular dada por un aumento de la sensibilidad a los agentes presores normalmente circulantes, una deficiencia de prostaglandinas vasodilatadoras y disfunci&oacute;n endotelial (1,21,22). La disfunci&oacute;n endotelial puede causar vasoespasmo y reducci&oacute;n en la perfusi&oacute;n, activaci&oacute;n de la cascada de coagulaci&oacute;n y salida de l&iacute;quido desde el compartimento intravascular (1,22).</p>      <p>Se ha encontrado asociaci&oacute;n significativa de marcadores de da&ntilde;o endotelial como la presencia de gl&oacute;bulos rojos con morfolog&iacute;a anormal y la elevaci&oacute;n de la deshidrogenasa l&aacute;ctica (LDH) con el desarrollo de encefalopat&iacute;a hipertensiva (23).</p>      ]]></body>
<body><![CDATA[<p>Dentro de las complicaciones de la eclampsia, el s&iacute;ndrome HELLP figura como una de las principales causas de morbimortalidad (7). El da&ntilde;o microvascular agregado por las caracter&iacute;sticas de esta patolog&iacute;a (8) hace que su reconocimiento y manejo deban ser inmediatos. Existe mayor riesgo de infarto cerebral y de transformaci&oacute;n hemorr&aacute;gica del mismo (14).</p>      <p>En la literatura, a penas se dispone de series de casos en lo que respecta a la relaci&oacute;n del s&iacute;ndrome HELLP y PRES. Se presupone que el da&ntilde;o endotelial intenso asociado a los cambios hemodin&aacute;micos excede la protecci&oacute;n predominante anterior y por eso se encuentra im&aacute;genes de compromiso anterior (2), como en el caso de la paciente presentada.</p>      <p>En cuanto al manejo de PRES en los s&iacute;ndromes hipertensivos del embarazo, por su puesto el control de la hipertensi&oacute;n arterial es esencial; debe ser reducida hasta rangos seguros para evitar mayor p&eacute;rdida de la autoregulaci&oacute;n cerebral. Sin embargo, esto por s&iacute; solo no siempre puede prevenir el desarrollo de PRES o la transformaci&oacute;n hemorr&aacute;gica (14). El uso de sulfato de magnesio para la prevenci&oacute;n y tratamiento de convulsiones en la eclampsia, se ha soportado como superior al de las anticonvulsivantes tradicionales (14,24).</p>      <p><font size="3"><b>Conclusiones</b></font></p>      <p>El s&iacute;ndrome de encefalopat&iacute;a reversible posterior es una entidad cada vez mejor, sin embargo relacionada con cuadros cl&iacute;nicos frecuentemente enfrentados por m&eacute;dicos internistas y neur&oacute;logos.</p>      <p>Es importante saber reconocerla para establecer un pron&oacute;stico, pero sobre todo para aplicar una terap&eacute;utica adecuada, ya que se conoce que su condici&oacute;n de "reversible" se cumple si se efect&uacute;a un tratamiento inmediato de la situaci&oacute;n desencadenante. Caso contrario las secuelas podr&iacute;an ser permanentes: s&iacute;ndrome convulsivo refractario, infartos o hemorragias cerebrales con d&eacute;ficit neurol&oacute;gico permanente e incluso la muerte (16).</p>      <p>Debido a que la asociaci&oacute;n con s&iacute;ndrome HELLP es rara, no existen datos estad&iacute;sticos al respecto, ni estudios de seguimiento a largo plazo. De ah&iacute; la importancia de la descripci&oacute;n de este caso y la recomendaci&oacute;n de una acci&oacute;n oportuna, as&iacute; como la vigilancia neurol&oacute;gica a largo plazo con realizaci&oacute;n de electroencefalograma para garantizar que no se produzcan complicaciones tard&iacute;as.</p>  <hr>      <p><font size="3"><b>Referencias</b></font></p>      <!-- ref --><p>1. <b>HINChEY J, CHAVES C, APPIGNANI B, BREEN J, PAO L, WANG A, et al</b>. A Reversable Posterior Leukoencephalopathy Syndrome. T<i>he New England Journal</i> of <i>Medicine.</i> 1996; 334:494-500.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000051&pid=S0120-8748201400010001000001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>      ]]></body>
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