<?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>0123-4226</journal-id>
<journal-title><![CDATA[Revista U.D.C.A Actualidad & Divulgación Científica]]></journal-title>
<abbrev-journal-title><![CDATA[rev.udcaactual.divulg.cient.]]></abbrev-journal-title>
<issn>0123-4226</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Aplicadas y Ambientales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-42262014000200002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ESTADOS HIPERTENSIVOS EN EL EMBARAZO: REVISIÓN]]></article-title>
<article-title xml:lang="en"><![CDATA[PREGNANCY HYPERTENSIVE STATES: REVIEW]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beltrán Chaparro]]></surname>
<given-names><![CDATA[Lina Vanessa]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Rios]]></surname>
<given-names><![CDATA[Jesús A.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Onatra Herrera]]></surname>
<given-names><![CDATA[William]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Ciencias Aplicadas y Ambientales U.D.C.A  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Ciencias Aplicadas y Ambientales U.D.C.A  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Ciencias Aplicadas y Ambientales U.D.C.A  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A04">
<institution><![CDATA[,Universidad de Ciencias Aplicadas y Ambientales U.D.C.A  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>31</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>31</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>17</volume>
<numero>2</numero>
<fpage>311</fpage>
<lpage>323</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-42262014000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-42262014000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-42262014000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La enfermedad hipertensiva en el embarazo es una de las primeras causas de morbimortalidad. La siguiente revisión pretende dar una visión de su fisiopatología, a la luz de la biología molecular. Se analizan los factores de riesgo, basados en la evidencia, el diagnóstico y el manejo, según las guías nacionales e internacionales, que permite tener un enfoque actualizado de una patología frecuente, para el especialista y para el médico general. Los autores desean que este documento sea de utilidad en la práctica médica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Hypertensive disease in pregnancy is one of the leading causes of morbidity and mortality. The following review aims to give an overview of its pathophysiology in the light of molecular biology, to analyze the risk factors based on the evidence, diagnosis and management according to national and international guidelines allows us to have an updated view of a common pathology for specialist and the general practitioner. The authors wish that this document will be useful in medical practice.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Hipertensión y embarazo]]></kwd>
<kwd lng="es"><![CDATA[pre eclampsia]]></kwd>
<kwd lng="es"><![CDATA[eclampsia]]></kwd>
<kwd lng="es"><![CDATA[síndrome HELLP]]></kwd>
<kwd lng="en"><![CDATA[Hypertension and pregnancy]]></kwd>
<kwd lng="en"><![CDATA[preeclampsia]]></kwd>
<kwd lng="en"><![CDATA[eclampsia]]></kwd>
<kwd lng="en"><![CDATA[HELLP syndrome]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="verdana">     <p align="right"><b>CIENCIAS DE LA SALUD-Art&iacute;culo T&eacute;cnico</b></p>     <p align="center"><b>ESTADOS HIPERTENSIVOS EN EL EMBARAZO: REVISI&Oacute;N</b></p>     <p align="center"><b>PREGNANCY HYPERTENSIVE STATES: REVIEW</b></p>     <p><b>Lina Vanessa Beltr&aacute;n Chaparro<sup>1</sup>,  Pablo Benavides<sup>2</sup>,  Jes&uacute;s  A. L&oacute;pez Rios<sup>3</sup>, William Onatra Herrera<sup>4</sup></b></p>     <p><sup>1</sup> M&eacute;dico General. Universidad de Ciencias Aplicadas y Ambientales U.D.C.A</p>     <p><sup>2</sup> M&eacute;dico General. U.D.C.A. Docente  de Patolog&iacute;a Humana y Semiolog&iacute;a.  U.D.C.A</p>     <p><sup>3</sup> M&eacute;dico General. U.D.C.A. Docente  de Patolog&iacute;a Humana y Semiolog&iacute;a.  U.D.C.A</p>     <p><sup>4</sup> MD M.Sc., Profesor Titular U.D.C.A. Profesor Especial Universidad Nacional de Colombia. Bogot&aacute;. Correspondencia: William Onatra H. MD.MSc. &Aacute;rea de Ginecolog&iacute;a y Obstetricia. Facultad  de Medicina. Universidad de Ciencias Aplicadas y Ambientales U.D.C.A, Calle 222 No 55-30. Bogot&aacute;,  Colombia, e-mail: <a href="mailto:w.onatra@udca.edu.co">w.onatra@udca.edu.co</a></p>     <p>Rev. U.D.C.A Act. &amp; Div. Cient. 17(2): 311-323, Julio-Diciembre,  2014</p> <hr>     ]]></body>
<body><![CDATA[<p><b>RESUMEN</b></p>     <p>La enfermedad hipertensiva  en  el embarazo  es  una  de  las primeras  causas de  morbimortalidad. La siguiente  revisi&oacute;n pretende dar una visi&oacute;n de su fisiopatolog&iacute;a, a la luz de la biolog&iacute;a molecular.  Se analizan los factores  de riesgo, basados en la evidencia, el diagn&oacute;stico  y el manejo,  seg&uacute;n  las gu&iacute;as nacionales  e internacionales, que permite  tener un enfoque actualizado de una patolog&iacute;a frecuente,  para el especialista y para el m&eacute;dico  general.  Los autores  desean  que este documento  sea de utilidad en la pr&aacute;ctica m&eacute;dica.</p>     <p><b>   Palabras   clave:</b>  Hipertensi&oacute;n   y embarazo,   pre  eclampsia,  eclampsia,  s&iacute;ndrome  HELLP.</p>   <hr>     <p><b>SUMMARY</b></p>     <p>Hypertensive  disease   in  pregnancy   is  one  of  the  leading causes  of morbidity and mortality. The following review aims to  give an  overview of its pathophysiology   in the  light of molecular  biology, to analyze the   risk factors  based  on the evidence, diagnosis  and management according  to national and  international  guidelines  allows us  to  have  an  updated view of a common pathology  for specialist  and  the general practitioner.  The  authors   wish that  this  document will be useful in medical practice.</p>     <p>   <b>Key  words:</b>   Hypertension   and   pregnancy,  preeclampsia, eclampsia,  HELLP syndrome.</p>   <hr>     <p><b>INTRODUCCI&Oacute;N</b></p>     <p>   Los trastornos hipertensivos  en el embarazo  son  una  complicaci&oacute;n que,  en Colombia,  se estima  causa  del 35% de la muertes  maternas (Buitrago <i>et al. </i>2013).  Ha recibido  diferentes  denominaciones, como  toxemia grav&iacute;dica, gestosis  e hipertensi&oacute;n  gestacional. Por ser una entidad  con m&uacute;ltiples etiolog&iacute;as,  el compromiso multisist&eacute;mico  que  presenta    ha sido de inter&eacute;s  para  las entidades de salud  y para  las asociaciones  dedicadas al estudio  de la hipertension  durante  el embarazo.  Existe evidencia, que es una entidad que compromete el endotelio,  con alteraciones  locales y sist&eacute;micas, que explican el cuadro  cl&iacute;nico y sus  complicaciones (Henriques <i>et al. </i>2014).</p>     <p>   Un estado  hipertensivo, se diagnostica cuando  las cifras tensionales est&aacute;n por encima de 140x90mm de Hg, despu&eacute;s de la semana 20 de gestaci&oacute;n, en paciente  previamente normotensa,  sin proteinuria (Sibai, 2003).</p>     <p>   <b>Epidemiolog&iacute;a: </b>La hipertensi&oacute;n  en el embarazo  es una entidad frecuente, con una prevalencia, en Estados Unidos, entre un 6 y12% (Bateman <i>et al. </i>2012) y, en el Reino Unido, entre un 5 y 6% (James &amp; Nelson-Piercy, 2004). La pre-eclampsia, se presenta  entre un 5 y 8%, de todos los embarazos en pa&iacute;ses desarrollados y, un 10%, en regiones en v&iacute;a de desarrollo (Hauth <i>et al. </i>2000).  Ocurre  en mujeres  nul&iacute;paras,  entre  un  6 y 17%, frente a la mult&iacute;para,  que es de 2 y 4% (Bryant <i>et al. </i>2005) y, en mayor porcentaje, en raza negra m&aacute;s que en blanca  (Boucoiran <i>et al. </i>2013); es m&aacute;s  frecuente  en embarazos gemelares, 15-20% (Leeman  &amp; Fontaine,  2008)  y un  25%, cursan  con nefropat&iacute;a cr&oacute;nica (Vest &amp; Cho, 2014).</p>     ]]></body>
<body><![CDATA[<p>   A nivel mundial,  la pre-eclampsia y eclampsia  contribuyen  entre  un  10  y 15% de  la mortalidad  materna. En Estados Unidos, la  pre-eclampsia es la tercera  causa  de mortalidad  materna, present&aacute;ndose 540 muertes  maternas, en el 2004, acompa&ntilde;ada de embolismo y de hemorragia (ACOG, 2013). En Colombia, tiene una incidencia del 7% de los embarazos y una tasa  de mortalidad  del 42x100.000 nacidos  vivos. Se asocia con mayores  complicaciones para el binomio madrefeto (Connor-Gorber <i>et al. </i>2012).</p>     <p><b>Objetivos:</b> Esta  revisi&oacute;n pretende dar una  visi&oacute;n global de los diferentes factores relacionados con la hipertensi&oacute;n  en el embarazo,  su diagn&oacute;stico  y manejo, basados en la evidencia.</h2>     <p>   En una forma simplificada, se describen  las recomendaciones de las diferentes gu&iacute;as nacionales  e internacionales, con el fin de poder disminuir la morbimortalidad de la mujer, en su vida reproductiva.</p>     <p><b>MATERIALES Y M&Eacute;TODOS</b></p>     <p>Para  la elaboraci&oacute;n  de esta  revisi&oacute;n, se tuvo en cuenta  las siguientes  palabras  clave: hipertensi&oacute;n  en el embarazo,  preeclampsia,  eclampsia,  crisis hipertensiva, diagn&oacute;stico  y terap&eacute;utica en hipertensi&oacute;n  gestacional y gu&iacute;as de manejo; fecha de b&uacute;squeda: enero  de 1995  a enero  de 2014; filtros Medline; idioma: Espa&ntilde;ol, Ingl&eacute;s y Franc&eacute;s;  referencias obtenidas: 94 y seleccionadas: 52.</p>     <p>   Para  la evaluaci&oacute;n  de  la recomendaciones basadas  en  la evidencia,  se  tuvieron  en  cuenta  los  siguiente  criterios:  I) Estudios   controlados  aleatorizados;   II-1) Controlados   sin aleatorizaci&oacute;n  y II-2) Estudios  de cohorte  (prospectivo  o retrospectivos) de casos  y controles  y, III) Opini&oacute;n de autoridades o expertos.  Los grados  de recomendaci&oacute;n: A) Una muy buena  evidencia, meta-an&aacute;lisis, estudios  controlados y aleatorizados; B) Evidencia moderada, estudios  de casos  y controles,  establece  relaciones  de causalidad;  C) Estudios  con alto riego de sesgo,  sin riego de causalidad  y, D) Evidencia III-IV, no se recomienda por su alto riesgo de sesgo  (SCOG, 2008).</p>     <p><b>RESULTADOS</b></p>     <p><b>Fisiopatolog&iacute;a: </b>Se  han  descrito  diferentes  hip&oacute;tesis  sobre la etiolog&iacute;a  que,  en  un  momento, esta  entidad  fue llamada la â€œenfermedad de las hip&oacute;tesisâ€,  existiendo un acuerdo  general,  que  es debida  a una  alteraci&oacute;n  vascular  endotelial (Brennan <i>et  al. </i>2014).  La Enfermedad Hipertensiva  en  el Embarazo  es  una  entidad  compleja  y multisist&eacute;mica, donde  numerosos modelos  han  intentado  explicar su  patog&eacute;nesis.  Dentro  de las diferentes  hip&oacute;tesis,  se postula  que  la respuesta inmune  materna, ante  el est&iacute;mulo  alog&eacute;nico  del feto y la reducci&oacute;n  de perfusi&oacute;n de ox&iacute;geno placentario  por vasoespasmo arterial, provocan  una invasi&oacute;n anormal  de tejido trofobl&aacute;stico  en  la pared  uterina,  en  la semana 12-13 de gestaci&oacute;n (Lyall <i>et al</i>. 2013). Todas estas  alteraciones, se encuentran moduladas por diferentes genes.</p>     <p><u>Genes  implicados  en la pre-eclampsia:</u> Cerca  de 70 genes  y polimorfismos  han  sido  seleccionados como  elementos implicados  en  la pre-eclampsia, incluyendo  Angiotensinogeno  (235Met&gt;thr), Enzima  convertidora  de  Angiotensina (I/D  intron  16),  Metilentetrahidrofolato  reductasa (C667T), Protrombina  (G20210A), Glutation â€“S-tranfersas (A313G) y prote&iacute;nas vasoactivas (Williams &amp; Morgan, 2012) (<a href="#t1">Cuadro 1</a>).</p>     <p><a name="t1"></a></p>    ]]></body>
<body><![CDATA[<p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t1.jpg"></p>     <p><u>Invasi&oacute;n citotrofobl&aacute;stica:</u>  En pre-eclamsia, las c&eacute;lulas trofobl&aacute;sticas  no invaden m&aacute;s  all&aacute; de la decidua  (recubierta  uterina) del miometrio,  de  modo  que  las arterias  espirales  se mantienen en un estado  de alta resistencia,  bajo flujo, con hipoperfusi&oacute;n  e hipoxemia de los vasos placentarios. En este mecanismo, se le ha dado  importancia  a la inmunolog&iacute;a  de la pre-eclampsia, con la intervenci&oacute;n de citoquinas  (Interleuquina 10) y factores  de crecimiento,  como  el factor de necrosis tumoral  (FNT), producidos por c&eacute;lulas  trofobl&aacute;sticas  (Mohajertehran <i>et al. </i>2012).</p>     <p>   El deterioro  de la inmunidad  materna durante  la gestaci&oacute;n, se complica  con   la vasoconstricci&oacute;n vascular, la hipoxia, la tensi&oacute;n  y la disminuci&oacute;n  de  los factores  angiog&eacute;nicos. La invasi&oacute;n trofobl&aacute;stica  anormal,  en  algunos  embarazos, lleva a  la hipoxia placentaria,  con  liberaci&oacute;n  de  citoquinas  y factores  inflamatorios,  produciendo da&ntilde;o  endotelial  (Estrada-Guti&eacute;rrez <i>et al. </i>2011),  causante de  los diferentes  efectos fisiopatol&oacute;gicos  de la pre-eclampsia, como  el S&iacute;ndrome HELLP (Hemolisis, elevaci&oacute;n de enzimas hep&aacute;ticas, plaquetas bajas), enfermedad cerebrovascular (ECV), hipertensi&oacute;n, desequilibrio entre tromboxano y la prostaciclina, implicando un da&ntilde;o  en la circulaci&oacute;n  &uacute;tero-placentaria (de Maat &amp; de Groot, 2011).</p>     <p>   <u>Disfunci&oacute;n placentaria</u>:  Durante la gestaci&oacute;n, la Unidad Vascular Materno Placentaria, se convierte en un sistema de baja resistencia, alto flujo y baja presi&oacute;n, debido al engrosamiento de las arterias  espirales,  al cambio  endotelial  y de la l&aacute;mina interna trofobl&aacute;stica.  En la pre-eclampsia, estos  cambios  son limitados, con lo que se produce  arterioesclerosis de las arteriolas espirales y basales,  disminuyendo  as&iacute; el flujo &uacute;tero- placentario,  por  vasoconstricci&oacute;n, produciendo isquemia  e infartos placentarios, que favorecen la necrosis tisular (Cox <i>et al. </i>2011). Estas modificaciones originan la rotura de los vasos cotiledianos  placentarios  y hemorragia retroplacentaria, que desencadena   desprendimiento prematuro de placenta  o <i>Abruptio placentae </i>(Chang <i>et al. </i>2009).</p>     <p>   La disfunci&oacute;n plaquetaria  en la pre-eclampsia, se encuentra mediada por activaci&oacute;n de las plaquetas, disminuci&oacute;n  de la sensibilidad a la prostaciclina  y aumento de la liberaci&oacute;n de tromboxano y serotonina  y, adem&aacute;s, da lugar a m&aacute;s agregaci&oacute;n plaquetaria y sobrerregulaci&oacute;n del sistema renina-angiotensina-aldosterona (RAA) &uacute;tero-placentario (Dvorak, 2002). La lesi&oacute;n tisular facilita la liberaci&oacute;n de tromboplastina que, a nivel renal, produce  agregaci&oacute;n de fibrina y vasoconstricci&oacute;n de los vasos renales, con lo cual, se incrementa la permeabilidad a la albumina  y prote&iacute;nas.  El e<i>dema</i>, se produce  por la liberaci&oacute;n de aldosterona secundaria, a la activaci&oacute;n del eje RAA, que  favorece la retenci&oacute;n  de agua  y de sodio  (Zafarmand <i>et al</i>. 2008).</p>     <p> <u>Disfunci&oacute;n endotelial:</u> El endotelio es un tejido especializado, encargado de mantener el flujo de los diferentes componentes sangu&iacute;neos, de promover  la respuesta inflamatoria e inmune y la actividad contr&aacute;ctil del m&uacute;sculo  liso. Al producirse  una  lesi&oacute;n endotelial,  se liberan sustancias qu&iacute;micas  multifuncionales,  a nivel perif&eacute;rico y local. En la pre-eclampsia, adem&aacute;s se incrementa la permeabilidad  de las membranas y aumenta la sensibilidad de la enzima convertidora  de angiotensina  (ACE), Angiotensina II y el receptor  de angiotensinogeno, provocando un  vasoespasmo severo,  con  compromiso  de la perfusi&oacute;n  tisular, alteraci&oacute;n  en la producci&oacute;n de prostaciclina  endotelial,  elevaci&oacute;n del Factor  de Von Willebrand  y de  los niveles de  fibronectina,  activaci&oacute;n  de  los neutr&oacute;filos con la consecuente liberaci&oacute;n de elastasas y proteasas.  La expresi&oacute;n  de todos  estos  factores  favorece la lesi&oacute;n endotelial y la producci&oacute;n de Radicales Libres (especies  t&oacute;xicas de ox&iacute;geno reactivo (Reactive Oxygen Species -ROS-) (Cnossen <i>et al. </i>2008), que empeoran el da&ntilde;o,  exacerbando la vasoconstricci&oacute;n, activando  los factores  procoagulantes que favorecen la trombosis  y la liberaci&oacute;n de factores de crecimiento vascular endotelial (Mutze <i>et al. </i>2008).</p>     <p>   El desbalance de los factores angiog&eacute;nicos y antiangiog&eacute;nicos lesiona, progresivamente, el endotelio.  Se ha implicado al crecimiento  vascular endotelial  (VEGF) en el mecanismo de la angiog&eacute;nesis, por activaci&oacute;n  de dos  receptores: uno, tirosina-quinasa -1 (FLT-1) y, otro, el VEGF-2. Otro factor implicado es el crecimiento  placentario  (PGF), miembro  de la familia de los factores  de crecimiento  endotelial,  pero  producido  en la placenta,  el cual,  unido  a FLT-1, previene las lesiones transmembrana endotelial. En la pre-eclampsia, se elevan estos factores, agravando  la lesi&oacute;n endotelial (Askie <i>et al. </i>2007).  Otro de los mediadores implicados  en la funci&oacute;n endotelial es el &oacute;xido n&iacute;trico (NO) producido  en el m&uacute;sculo  liso  vascular  endotelial  y activado  por  la guanilato  ciclasa. Esta  enzima  sintetiza  la guanosina ciclasa  monofosfato a guanosina trifosfato, llevando a la acumulaci&oacute;n de  guanosina monofosfato, que activa v&iacute;as intracelulares,  produciendo una relajaci&oacute;n vascular endotelial (Savaj &amp; Vaziri, 2012). Adem&aacute;s, el NO sirve es antioxidante,  inhibidor plaquetario  y regula  sustancias anticoagulantes y antitrombog&eacute;nicas. En la pre-eclampsia, el NO se encuentra alterado,  agravando  la vasoconstricci&oacute;n endotelial (QI <i>et al. </i>2013).</p>     <p><u>Efectos maternos:</u> Estas alteraciones  vasculares placentarias  y endoteliales  en la pre-eclampsia lesionan todas  las estructuras org&aacute;nicas de la mujer en el embarazo,  comprometiendo &oacute;rganos  blancos  (<a href="#t2">Cuadro  2</a>), como  el sistema  nervioso central,  alveolos,  miocardio,   hepatocito, glom&eacute;rulo  renal, endotelio vascular y el sistema  inmune.</p>     <p><a name="t2"></a></p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t2.jpg"></p>     ]]></body>
<body><![CDATA[<p><b>Clasificaci&oacute;n: </b>La  hipertensi&oacute;n,  durante   el  embarazo,   ha tenido  diferentes  clasificaciones,  de  acuerdo  a  los grupos  de  estudio.   Se  han  adoptado,  entre  otras,   la  propuesta de las Gu&iacute;as emitidas  por parte  del Ministerio de Salud  de Colombia 2014 (Buitrago <i>et al. </i>2013); las Gu&iacute;as del manejo  del s&iacute;ndrome  hipertensivo del embarazo  de la Secretar&iacute;a  de Salud de Bogot&aacute; (Garz&oacute;n <i>et al. </i>2010); del Colegio Americano de Ginecolog&iacute;a  y Obstetricia  (ACOG, 2012);  de la Sociedad Canadiense de Obstetricia  y Ginecolog&iacute;a  (SCOG, 2008);  del Colegio Real de Obstetricia  y Ginecolog&iacute;a (RCOG, 2011); del Colegio Mexicano de Especialistas en Ginecolog&iacute;a y Obstetricia ((Leis-M&aacute;rquez <i>et al. </i>2010) y New Zealand Obstetricians and Gynaecology (Lowe <i>et al. </i>2009) (<a href="#t3">Cuadro 3</a>).</p>     <p><a name="t3"></a></p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t3.jpg"></p>     <p>   Los  estados hipertensivos  en el embarazo,  se clasifican: 1) Hipertensi&oacute;n   gestacional;  2) Pre-eclampsia;  3) Pre-eclampsia severa; 4) Eclampsia;  5) Hipertensi&oacute;n  severa y, 6) Hipertensi&oacute;n cr&oacute;nica.</p>     <p>   Diferentes  estudios  poblacionales evidencian  que  el 1% de los embarazos se encuentran complicados con hipertensi&oacute;n  preexistente; 5-6%, acompa&ntilde;ada de hipertensi&oacute;n  gestacional sin proteinuria  y 1-2%, asociada a pre-eclampsia, especialmente,  en  mujeres  mayores  de  40  a&ntilde;os  o con  sobrepeso (Leis-M&aacute;rquez <i>et al. </i>2010).</p>     <p><b>Factores  de riesgo:</b> Se pueden  agrupar  en moderado y de alto riesgo,  como  se muestra en la <a href="#t4">tabla 1</a> (Buitrago <i>et al.</i> 2013; ACOG, 2012).</p>     <p><a name="t4"></a></p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t4.jpg"></p>     <p>   <b>Diagn&oacute;stico: </b>En la evaluaci&oacute;n  diagn&oacute;stica, se  tendr&aacute;n  en cuenta  los datos  obtenidos:  1) Historia cl&iacute;nica prenatal;  2) Hallazgos al examen  f&iacute;sico y, 3) Resultado  de los ex&aacute;menes paracl&iacute;nicos.   Para  el  embarazo,   se  recomienda  controles cada cuatro  semanas hasta  la 32; luego, cada  dos semanas hasta  la 36  y, cada  semana, hasta  la 40,  seg&uacute;n  evoluci&oacute;n cl&iacute;nica. Valoraci&oacute;n por especialista,  a partir de la semana 20 y 32,  como  m&iacute;nimo  (Garz&oacute;n <i>et al. </i>2010).  En los casos  de enfermedad hipertensiva  en el embarazo,  los controles  y la monitorizaci&oacute;n  fetal, se deben  realizar cada  15 d&iacute;as y, en los casos severos, hospitalizar.</p>     <p>   <u>Historia cl&iacute;nica</u>: Se tendr&aacute;n  en cuenta  los factores  de riesgo y sintomatolog&iacute;a de  la paciente,  de  acuerdo  a los criterios cl&iacute;nicos y clasificaci&oacute;n, descritos  anteriormente, para de los diversos estados hipertensivos en el embarazo.  Se emple&oacute; el Registro de historia cl&iacute;nica, dise&ntilde;ada por el Centro Latinoamericano  de Perinatolog&iacute;a  Salud de la Mujer y Reproductiva (CLAP) (Fescina <i>et al. </i>2010).</p>     ]]></body>
<body><![CDATA[<p><u>Examen  f&iacute;sico:</u> Permitir&aacute;  confirmar  y constatar los  signos descritos  para los diferentes estadios  de la hipertensi&oacute;n  gestacional.</p>     <p><u>Evaluaci&oacute;n  paracl&iacute;nica</u>:  Se  recomienda, en  general,  Grupo sangu&iacute;neo, Serolog&iacute;a,  Cuadro  hem&aacute;tico, VSG, Recuento  de plaquetas, Parcial de orina, Proteinuria en orina de 24 horas (Lindheimer &amp; Kanter, 2010), Glicemia, Transaminasas (ALT, ASL), &Aacute;cido &uacute;rico,  Creatinina,  Nitr&oacute;geno  ureico,  Ecograf&iacute;a obst&eacute;trica  con Doppler de circulaci&oacute;n fetal, placentaria  y arterias uterinas (Meler <i>et al. </i>2010).</p>     <p>   En un  meta-an&aacute;lisis  de  estudio  de  cohortes prospectivas  - retrospectivas  y caso  â€“control  en  t&eacute;rminos  de  Sensibilidad (Se), especificidad (Esp), valor predictivo positivo (VPP), valor predictivo negativo  (VPN) (<a href="#t5">Tabla 2</a>), se destacan, como  los m&aacute;s  relevantes  en especificidad,  la Alfafetoproteina,  la Gonadotropina corionica  y la onda  de  flujo, en el doppler  de arterias uterinas  (Grill <i>et al. </i>2009).</p>       <p><a name="t5"></a></p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t5.jpg"></p>  <b>Tratamiento:</b> En relaci&oacute;n al manejo  del trastorno  hipertensi- vo asociado al embarazo  (THAE), la paciente  deber&aacute;  recibir una clasificaci&oacute;n, de acuerdo  a los criterios cl&iacute;nicos y paracl&iacute;nicos (Turner, 2010).</p>     <p><u>Hipertensi&oacute;n gestacional</u>(Duley <i>et al.</i> 2010):     <p>     <p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t6.jpg"></p>     <p><b>Pre-eclampsia leve (PPE):</b> Si la paciente  cursa con pre-eclampsia leve y su embarazo  es menor de 34 semanas, se considera PPE, lejos del t&eacute;rmino de probable  origen placentario.  En este caso,  el manejo  es expectante, con monitoreo  semanal  materno y fetal. SCOG grado b, nivel evidencia I. 42 (SCOG, 2008).</p>     ]]></body>
<body><![CDATA[<p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t7.jpg"></p>     <p><b>Pre-eclampsia severa (ACOG, 2012):</b> Hospitalizar si paciente  cursa con PEE severa, lejos del t&eacute;rmino, presencia  de signos de compromiso multiorg&aacute;nico.  SOGC GRADO B NIVEL II.</p>     <p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t8.jpg"></p>     <p>   Cifras tensionales de 160/110mmHg o la presi&oacute;n arterial media &gt; de 105 son criterio para iniciar antihipertensivos  (<a href="#t9">Cuadro 4</a>). </p>      <p><a name="t9"></a></p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t9.jpg"></p>       <p>    <p align="center"><img src="img/revistas/rudca/v17n2/v17n2a02t10.jpg"></p>     ]]></body>
<body><![CDATA[<p><u>Profilaxis</u>: Se recomienda el uso  de Aspirina de 75-100mg d&iacute;a, a partir de la 12 semana hasta  un d&iacute;a antes  del parto; esta  profilaxis solamente ha  demostrado beneficio  en  pacientes  hipertensas cr&oacute;nicas  o  aquellas  con  antecedentes de pre-eclampsia temprana, en gestaciones anteriores  y no est&aacute;  recomendada para  la poblacion  general  de gestantes. Calcio 1.200mg, a partir de la semana 14. Nivel A. No hay evidencia del uso de Magnesio, &Aacute;cido f&oacute;lico, Vitamina C y E, Omega, Ajo, Licopeno  y Coenzima Q, como  preventivos de hipertensi&oacute;n  en el embarazo  Nivel A (Roberts <i>et al. </i>2010).</p>     <p><u>Conflicto de intereses:</u>  El manuscrito fue preparado y revisado  con la participaci&oacute;n  de todos  los autores,  quienes  declaramos  que  no  existe ning&uacute;n  conflicto de  intereses,  que ponga  en riesgo la validez de los resultados  presentados.</p>     <p><b>BIBLIOGRAF&Iacute;A</b></p>     <!-- ref --><p>1.   ABALOS, E.; DULEY, L.; STEYN, D.W. 2014.  Antihypertensive drug therapy for mild to moderate hypertension  during  pregnancy.  Cochrane   Database  Syst. 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