<?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>2078-7170</journal-id>
<journal-title><![CDATA[CorSalud]]></journal-title>
<abbrev-journal-title><![CDATA[CorSalud]]></abbrev-journal-title>
<issn>2078-7170</issn>
<publisher>
<publisher-name><![CDATA[Cardiocentro Ernesto Che Guevara]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2078-71702020000400408</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Índice de compactación cardíaca calculado en embriones humanos de los estadios 17 al 23 de Carnegie]]></article-title>
<article-title xml:lang="en"><![CDATA[Cardiac compaction index calculated in human embryos of Carnegie stages 17-23]]></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[Vila Bormey]]></surname>
<given-names><![CDATA[María A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez González]]></surname>
<given-names><![CDATA[Elibet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Lima]]></surname>
<given-names><![CDATA[María N.]]></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[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. Santa Clara Departamento de Ciencias Morfológicas ]]></institution>
<addr-line><![CDATA[ Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Cardiocentro Ernesto Che Guevara Servicio de Estimulación Cardíaca y Electrofisiología ]]></institution>
<addr-line><![CDATA[Santa Clara Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>12</volume>
<numero>4</numero>
<fpage>408</fpage>
<lpage>414</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2078-71702020000400408&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2078-71702020000400408&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2078-71702020000400408&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Aún persisten controversias en los eventos de la morfogénesis cardiovascular y una ausencia, casi total, de parámetros morfométricos en las fases iniciales de su desarrollo.  Objetivos: Determinar la razón miocardio no compactado/miocardio compactado (NC/C) en ambos ventrículos y la evolución cronológica de esta razón en el período estudiado.  Método: Se realizó un estudio descriptivo, transversal, con 18 embriones humanos pertenecientes a la Embrioteca de la Universidad de Ciencias Médicas de Villa Clara (Cuba) clasificados entre los estadios 17 y 23 de Carnegie. Se determinó el índice NC/C, el cual no es más que el cálculo matemático de la razón entre las porciones no compactada y compactada por espécimen y por estadios.  Resultados: Los resultados de la aplicación de este índice en el ventrículo derecho de los embriones son: 7,17; 4,26; 3,12; 2,79; 2,36; 2,84 y 2,10 en los estadios de Carnegie 17, 18, 19, 20, 21, 22 y 23, respectivamente. En estos mismos especímenes se obtuvo como resultado en el ventrículo izquierdo: 5,0; 3,80; 2,68; 2,18; 2,50; 2,01 y 1,56, igualmente organizado por estadios.  Conclusiones: Los índices NC/C obtenidos sustentan cuantitativamente que la compactación del miocardio ventricular avanza en los estadios evaluados; sus valores, mayores en el vértice, denotan que es posible que aún no haya concluido en esta zona.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Controversies still persist regarding the events of cardiovascular morphogenesis and an almost total absence of morphometric parameters in the initial phases of its development.  Objectives:  To determine the non-compacted to compacted (NC/C) myocardium ratio in both ventricles and the chronological progression of this ratio in the period studied.  Method:  A descriptive, cross-sectional study was carried out with 18 human embryos belonging to the Embryoteca of the Universidad de Ciencias Médicas de Villa Clara (Cuba) classified between Carnegie stages 17 and 23. The NC/C ratio -which is simply the mathematical calculation of the ratio between the non-compacted and compacted portions per specimen and per stage- was determined.  Results:  The application of this ratio in the right ventricle of the embryos obtained the following results: 7.17; 4.26; 3.12; 2.79; 2.36; 2.84 and 2.10 in Carnegie's stages 17, 18, 19, 20, 21, 22 and 23, respectively. In these same specimens, the left ventricle yielded the following results: 5.0; 3.80; 2.68; 2.18; 2.50; 2.01 and 1.56, also organized by stages.  Conclusions:  NC/C ratios obtained quantitatively support a progression of the ventricular myocardial compaction in the evaluated stages; their higher values at the apex denote that it may still be incomplete in this zone.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Embrión humano]]></kwd>
<kwd lng="es"><![CDATA[Desarrollo embrionario y fetal]]></kwd>
<kwd lng="es"><![CDATA[Compactación miocárdica]]></kwd>
<kwd lng="es"><![CDATA[Morfometría]]></kwd>
<kwd lng="es"><![CDATA[Índice de compactación]]></kwd>
<kwd lng="en"><![CDATA[Human embryo]]></kwd>
<kwd lng="en"><![CDATA[Embryonic and fetal development]]></kwd>
<kwd lng="en"><![CDATA[Myocardial compaction]]></kwd>
<kwd lng="en"><![CDATA[Morphometry]]></kwd>
<kwd lng="en"><![CDATA[Compaction index]]></kwd>
</kwd-group>
</article-meta>
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