<?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>0535-5133</journal-id>
<journal-title><![CDATA[Investigación Clínica]]></journal-title>
<abbrev-journal-title><![CDATA[Invest. clín]]></abbrev-journal-title>
<issn>0535-5133</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0535-51332023000300308</article-id>
<article-id pub-id-type="doi">10.54817/ic.v64n3a04</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of creatine kinase isoenzyme (CK-MB) on early prognosis after off-pump coronary artery bypass grafting.]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de la isoenzima de creatina quinasa (CK-MB) en el pronóstico temprano después de un injerto de revascularización coronaria sin circulación extracorpórea.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zhou]]></surname>
<given-names><![CDATA[Zifan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Longfei]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Jun]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Ningning]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Yongmin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sun]]></surname>
<given-names><![CDATA[Lizhong]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Beijing Anzhen Hospital Department of Cardiac Surgery ]]></institution>
<addr-line><![CDATA[Beijing ]]></addr-line>
<country>PR China</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>64</volume>
<numero>3</numero>
<fpage>308</fpage>
<lpage>316</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S0535-51332023000300308&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S0535-51332023000300308&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S0535-51332023000300308&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study aimed to analyze the effect of elevated creatine kinase isozyme levels on early prognosis after off-pump coronary artery bypass (OPCAB) grafting. Based on the levels of creatine kinase isoenzyme (CK-MB), 116 patients were divided into two groups: one with a mild increase (n=85) and another group with a severe increase (n=31) in the enzyme. Clinical data, changes in CK-MB levels at 12, 24, and 48 hours after surgery, changes in left ventricular ejection fraction (LVEF) and left ventricular end-diastolic diameter (LVESD) before surgery, and seven days and three months after surgery were measured, and recorded. Also, the blood flow of the bridging vessel, vascular resistance, the diameter of the anterior descending branch, and the diameter of the distal target vessel were recorded during the operation (&gt; 1.5 mm). A decrease in the level of LVEDD was recorded in both groups after the operation compared to the levels before. However, in the group with a mild increase in CK-MB, the LVEF after the operation increased compared to before the operation (p&lt;0.05). The occurrence of angina pectoris 24 hours before surgery, high vascular resistance during surgery, and diameter of distal target vessel &gt; 1.5 mm were related factors affecting the increase of CK-MB after surgery. The ratio of these factors was higher in the severe increase group than in the mild increase group (p&lt;0.05). An increase in myocardial enzymes causes a slow recovery of myocardial function, so it can be used as a critical biological index to reflect the prognosis of patients.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este estudio tuvo como objetivo analizar el efecto de los niveles elevados de la isoenzima de creatina quinasa (CK-MB) en el pronóstico temprano después de un injerto de revascularización coronaria sin circulación extracorpórea (OPCAB). Basados en el nivel de la isoenzima de creatina quinasa CK-MB, 116 pacientes fueron divididos en dos grupos: uno con un aumento leve de la enzima (n=85) y otro grupo con un aumento severo (n=31). Los datos clínicos, los cambios en los niveles de CK-MB a las 12, 24 y 48 horas posteriores a la cirugía, los cambios en la fracción de eyección del ventrículo izquierdo (LVEF) y el diámetro telediastólico del ventrículo izquierdo (LVESD) antes de la cirugía, 7 días y 3 meses después fueron medidos y registrados. Además, fueron registrados el flujo sanguíneo del puente venoso, la resistencia vascular, el diámetro de la rama descendente anterior y el diámetro del vaso diana distal durante la operación (&gt; 1,5 mm). Se registró una disminución en el nivel de LVEDD en ambos grupos después de la operación en comparación con antes de la operación. Pero en el grupo con un ligero aumento, el nivel de LVEF después de la operación aumentó en comparación con el de antes (p&lt;0,05). La aparición de angina de pecho 24 horas antes de la cirugía, la alta resistencia vascular durante la cirugía y el diámetro del vaso diana distal &gt; 1,5 mm fueron los factores relacionados que afectaron al aumento de CK-MB después de la cirugía. La proporción de estos factores fue mayor en el grupo del aumento severo que en el grupo del aumento leve (p &lt;0,05). Un incremento de las isoenzima de CK-MB provoca una recuperación lenta de la función miocárdica, por lo que puede utilizarse como un índice biológico crítico para reflejar el pronóstico de los pacientes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[coronary heart disease]]></kwd>
<kwd lng="en"><![CDATA[beating coronary artery bypass grafting]]></kwd>
<kwd lng="en"><![CDATA[myocardial enzymes]]></kwd>
<kwd lng="en"><![CDATA[early prognosis]]></kwd>
<kwd lng="es"><![CDATA[enfermedad cardiaca]]></kwd>
<kwd lng="es"><![CDATA[injerto de revascularización coronaria con el corazón latiendo]]></kwd>
<kwd lng="es"><![CDATA[creatine kinase isoenzyme (CK-MB)]]></kwd>
<kwd lng="es"><![CDATA[pronóstico temprano]]></kwd>
</kwd-group>
</article-meta>
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