<?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>2312-3893</journal-id>
<journal-title><![CDATA[Revista Virtual de la Sociedad Paraguaya de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. virtual Soc. Parag. Med. Int.]]></abbrev-journal-title>
<issn>2312-3893</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Paraguaya de Medicina Interna]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2312-38932024000100043</article-id>
<article-id pub-id-type="doi">10.18004/rvspmi/2312-3893/2024.e11132404</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de la fibrosis miocárdica de la aurícula izquierda mediante la imagen por resonancia magnética cardíaca en la fibrilación auricular]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of left atrial myocardial fibrosis by cardiac magnetic resonance imaging in atrial fibrillation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Scavenius Aguilera]]></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[Torales Salinas]]></surname>
<given-names><![CDATA[Judith María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</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 Facultad de Ciencias Médicas Departamento de Cardiología]]></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>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>11</volume>
<numero>1</numero>
<fpage>43</fpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2312-38932024000100043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2312-38932024000100043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2312-38932024000100043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La fibrilación auricular se inicia y se mantiene mediante factores desencadenantes y el sustrato auricular subyacente, por ende, se están utilizando técnicas de ablación modificadoras del sustrato anatómico. Sin embargo, ninguna de estas estrategias complementarias ha dado resultados consistentes. Las innovaciones en las técnicas de resonancia magnética nuclear cardíaca, especialmente las imágenes con realce tardío de gadolinio han mejorado nuestra capacidad para comprender mejor e identificar con precisión la fibrosis en el miocardio auricular de pacientes con fibrilación auricular. La consideración de la fibrosis auricular para el tratamiento terapéutico de la fibrilación auricular tiene el potencial de mejorar significativamente la comprensión y los resultados clínicos de la fibrilación auricular. Sin embargo, las técnicas de resonancia magnética nuclear cardíaca con realce tardío de gadolinio para evaluar la fibrosis de la aurícula izquierda todavía requieren de una experiencia significativa. Es necesario establecer más mejoras técnicas y métodos de obtención de imágenes más generalizados. Existe una amplia variación individual en la extensión de la fibrosis auricular izquierda en pacientes con fibrilación auricular. El mapeo de voltaje como herramienta para describir cambios fibróticos aún está bajo investigación. Depende de varias variables biológicas y tecnológicas y aún es necesario estandarizarlo. La combinación de un modelo de geometría pulmonar y de aurícula izquierda específico del paciente con una segmentación de cicatrices auriculares de procesamiento manual objetivo ciertamente será beneficiosa. Todas las estrategias de ablación más allá del aislamiento de las venas pulmonares, incluida la ablación guiada por fibrosis, deben confirmarse y validarse con respecto a la eficacia y la seguridad en estudios clínicos prospectivos multicéntricos aleatorizados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Atrial fibrillation is initiated and maintained by triggering factors and the underlying atrial substrate. Therefore, anatomical substrate-modifying ablation techniques are being used. However, none of these complementary strategies have yielded consistent results. Innovations in cardiac magnetic resonance imaging techniques, especially late gadolinium enhancement imaging, have improved our ability to understand better and accurately identify fibrosis in the atrial myocardium of patients with atrial fibrillation. Consideration of atrial fibrosis for the therapeutic management of atrial fibrillation has the potential to significantly improve the understanding and clinical outcomes of atrial fibrillation. However, late gadolinium enhancement cardiac magnetic resonance imaging techniques to assess left atrial fibrosis still require significant experience. Further technical improvements and more generalized imaging methods need to be established. There is wide individual variation in the extent of left atrial fibrosis in patients with atrial fibrillation. Voltage mapping as a tool to describe fibrotic changes is still under investigation. It depends on several biological and technological variables and still needs to be standardized. The combination of a patient-specific lung and left atrial geometry model with targeted manual processing atrial scar segmentation will certainly be beneficial. All ablation strategies beyond pulmonary vein isolation, including fibrosis-guided ablation, should be confirmed and validated concerning efficacy and safety in prospective multicenter randomized clinical studies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[fibrilación auricular]]></kwd>
<kwd lng="es"><![CDATA[imagen por resonancia magnética]]></kwd>
<kwd lng="es"><![CDATA[mapeo epicárdico]]></kwd>
<kwd lng="es"><![CDATA[fibrosis.]]></kwd>
<kwd lng="en"><![CDATA[atrial fibrillation]]></kwd>
<kwd lng="en"><![CDATA[magnetic nuclear resonance]]></kwd>
<kwd lng="en"><![CDATA[epicardial mapping]]></kwd>
<kwd lng="en"><![CDATA[fibrosis.]]></kwd>
</kwd-group>
</article-meta>
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