<?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>0864-0300</journal-id>
<journal-title><![CDATA[Revista Cubana de Investigaciones Biomédicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Invest Bioméd]]></abbrev-journal-title>
<issn>0864-0300</issn>
<publisher>
<publisher-name><![CDATA[ECIMED]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-03002023000100028</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El miocardio ventricular desde un enfoque cuantitativo. Su relación con la longitud del embrión humano]]></article-title>
<article-title xml:lang="en"><![CDATA[The ventricular myocardium from a quantitative approach. It´s relation to the length of the human embryo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navas Contino]]></surname>
<given-names><![CDATA[Mirka]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vilas Bormey]]></surname>
<given-names><![CDATA[María Aimée]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Lima]]></surname>
<given-names><![CDATA[María Nelia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alfonso Aguila]]></surname>
<given-names><![CDATA[Belkis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santana Machado]]></surname>
<given-names><![CDATA[Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silverio Ruiz]]></surname>
<given-names><![CDATA[Larissa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ciencias Médicas de Villa Clara  ]]></institution>
<addr-line><![CDATA[Santa Clara Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>42</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03002023000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03002023000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03002023000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Pese al incremento en conocimientos de la morfogénesis cardiaca humana, se conoce poco sobre los detalles cuantitativos en ello.  Objetivo:  Describir cuantitativamente el desarrollo del miocardio ventricular compacto y no compacto y su correlación con la longitud cráneo rabadilla.  Métodos:  Estudio descriptivo, transversal en 18 embriones humanos de los estadios 17 al 23 de Carnegie, pertenecientes a la Embrioteca de la Universidad de Ciencias Médicas de Villa Clara. Se midió la longitud del embrión, el grosor del miocardio compacto, trabecular y total en la pared lateral de ambos ventrículos y del vértice cardiaco.  Resultados:  El grosor de la pared lateral del miocardio compacto aumenta en ambos ventrículos desde los estadios 17 al 23 de Carnegie, de 0,06 mm hasta 0,17 mm en el derecho y de 0,09 mm hasta 0,23 mm en el izquierdo. El grosor de la pared lateral trabeculada disminuye con el avance de los estadios, de 0,43 mm a 0,34 mm en el derecho y de 0,45 mm a 0,37 mm en el izquierdo. El grosor de la pared lateral total aumenta de 0,48 mm a 0,51 mm en el ventrículo derecho y de 0,52 mm a 0,62 mm en el izquierdo. El grosor de la pared del vértice compacto aumenta de 0,19 mm a 0,25 mm.  Conclusiones:  La compactación de la pared ventricular aumenta con el desarrollo; la longitud cráneo raquis se relaciona con el grosor del miocardio ventricular.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Despite the increase in knowledge of human morphogenesis, especially cardiogenesis and the processes by which the morphology of the ventricular myocardium is defined, little is known about the quantitative details in it.  Objectives:  To quantitatively describe the development of compact and non-compact ventricular myocardium and its correlation with cranio-rump length. Methods: descriptive, cross-sectional study in 18 human embryos from Carnegie stages 17 to 23, belonging to the Embryoteca of the Villa Clara University of Medical Sciences. The length of the embryo, the thickness of the compact, trabecular and total myocardium were measured in the lateral wall of both ventricles and the cardiac apex.  Results:  The thickness of the lateral wall of the compact myocardium increases in both ventricles from Carnegie stages 17 to 23, from 0.06 mm to 0.17 mm in the right and from 0.09 to 0.23 mm in the left ventricles. The thickness of the trabeculated lateral wall decreases with the advancement of the stages, from 0.43 mm to 0.34 mm in the right and from 0.45 mm to 0.37 mm in the left. The total lateral wall thickness increases from 0.48 mm to 0.51 mm in the right ventricle and from 0.52 mm to 0.62 mm in the left. The wall thickness of the compact vertex increases from 0.19 mm to 0.25 mm.  Conclusions:  Ventricular wall compaction increases with development; the cranio-spinal length is related to the thickness of the ventricular myocardium.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Embrión humano]]></kwd>
<kwd lng="es"><![CDATA[compactación miocárdica]]></kwd>
<kwd lng="es"><![CDATA[morfometría]]></kwd>
<kwd lng="en"><![CDATA[human embryo]]></kwd>
<kwd lng="en"><![CDATA[myocardial compaction]]></kwd>
<kwd lng="en"><![CDATA[morphometry]]></kwd>
</kwd-group>
</article-meta>
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