<?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>1812-9528</journal-id>
<journal-title><![CDATA[Memorias del Instituto de Investigaciones en Ciencias de la Salud]]></journal-title>
<abbrev-journal-title><![CDATA[Mem. Inst. Investig. Cienc. Salud]]></abbrev-journal-title>
<issn>1812-9528</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Investigaciones en Ciencias de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1812-95282021000300105</article-id>
<article-id pub-id-type="doi">10.18004/mem.iics/1812-9528/2021.019.03.105</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rol del bloqueo interauricular avanzado en la predicción de accidentes cerebrovasculares isquémicos.]]></article-title>
<article-title xml:lang="en"><![CDATA[Role of advanced interatrial block in the prediction of ischemic strokes.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Falcón]]></surname>
<given-names><![CDATA[Rocío del Pilar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zapattini]]></surname>
<given-names><![CDATA[Diego Hernán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Scavenius]]></surname>
<given-names><![CDATA[Karina Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meza]]></surname>
<given-names><![CDATA[Alfredo Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galeano]]></surname>
<given-names><![CDATA[Erdulfo Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Centurión]]></surname>
<given-names><![CDATA[Osmar Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Asunción Hospital de Clínicas División de Medicina Cardiovascular]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Sanatorio Metropolitano Departamento de Investigación en Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Fernando de la Mora ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>19</volume>
<numero>3</numero>
<fpage>105</fpage>
<lpage>114</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S1812-95282021000300105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S1812-95282021000300105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S1812-95282021000300105&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El bloqueo interauricular (BIA) es un marcador significativo en la predicción del desarrollo de Fibrilación Auricular (FA). El sustrato histopatológico que se observa en el proceso de remodelación auricular es la fibrosis del miocardio auricular induciendo disincronía interauricular. La disfunción electromecánica de la aurícula izquierda (AI) produce una activación anormal de sus paredes, el aumento de la presión, la dilatación, la disfunción endotelial, y la fibrosis de la AI. Estas alteraciones favorecen la conducción lenta, el bloqueo unidireccional y el desarrollo de mecanismos de reentrada con la aparición de la FA con sus nefastas complicaciones, entre ellas el accidente cerebrovascular (ACV). El BIA está presente hasta en un 59% de los pacientes mayores de la población general y se asoció con un aumento del riesgo de unas 3 veces más de FA de nueva aparición y ACV isquémico. Es evidente el interés académico, clínico, y terapéutico en el diagnóstico electrocardiográfico certero del BIA avanzado, ya que el mismo se asocia con arritmias supraventriculares, fibrilación auricular, ACV embólicos y mortalidad. La detección de BIA avanzado en pacientes con ACV isquémico previo permite identificar a pacientes de alto riesgo de recurrencia en los que algunas terapias farmacológicas podrían ser beneficiosas. Los pacientes con BIA avanzado sin episodios previos de FA documentada también presentan un riesgo aumentado de ACV embólico. Por lo tanto, es necesario realizar ensayos clínicos randomizados cuyos resultados podrían avalar el uso de anticoagulantes en ausencia de FA documentada en pacientes con BIA avanzado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Interatrial block (IAB) is a significant marker in the prediction of the development of Atrial Fibrillation (AF). The histopathological substrate observed in the atrial remodeling process is fibrosis of the atrial myocardium, inducing interatrial desynchrony. Electromechanical dysfunction of the left atrium (LA) produces abnormal activation of its walls, increased pressure, dilation, endothelial dysfunction, and fibrosis of the LA. These alterations favor slow conduction, unidirectional block and the development of reentry mechanisms with the appearance of AF with its disastrous complications, including cerebrovascular accident (CVA). IAB is present in up to 59% of older patients in the general population and was associated with a 3-fold increased risk of new-onset AF and ischemic stroke. The academic, clinical, and therapeutic interest in the accurate electrocardiographic diagnosis of advanced IAB is evident, since it is associated with supraventricular arrhythmias, atrial fibrillation, embolic stroke and mortality. The detection of advanced IAB in patients with previous ischemic stroke allows the identification of patients at high risk of recurrence in which some pharmacological therapies could be beneficial. Patients with advanced IAB with no prior documented AF episodes are also at increased risk of embolic stroke. Therefore, it is necessary to conduct randomized clinical trials whose results might be available in the use of anticoagulants in the absence of documented AF in patients with advanced IAB.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bloqueo interauricular]]></kwd>
<kwd lng="es"><![CDATA[fibrilación auricular]]></kwd>
<kwd lng="es"><![CDATA[accidente cerebrovascular]]></kwd>
<kwd lng="es"><![CDATA[embolismo]]></kwd>
<kwd lng="en"><![CDATA[Interatrial block]]></kwd>
<kwd lng="en"><![CDATA[atrial fibrillation]]></kwd>
<kwd lng="en"><![CDATA[stroke]]></kwd>
<kwd lng="en"><![CDATA[embolism]]></kwd>
</kwd-group>
</article-meta>
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