<?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>1688-0420</journal-id>
<journal-title><![CDATA[Revista Uruguaya de Cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Urug.Cardiol.]]></abbrev-journal-title>
<issn>1688-0420</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Uruguaya de Cardiología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-04202004000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Asociación entre hiperhomocisteinemia, cardiopatía isquémica y diabetes tipo 2]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SOTO]]></surname>
<given-names><![CDATA[ENRIQUE]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MIMBACAS]]></surname>
<given-names><![CDATA[ADRIANA]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GASCUE]]></surname>
<given-names><![CDATA[CECILIA]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[JAVIEL]]></surname>
<given-names><![CDATA[GERARDO]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[FERRERO]]></surname>
<given-names><![CDATA[RITA]]></given-names>
</name>
<xref ref-type="aff" rid="A05"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[VITARELLA]]></surname>
<given-names><![CDATA[GRACIELA]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[CARDOSO]]></surname>
<given-names><![CDATA[HORACIO]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Médico del Centro de Asistencia del Sindicato Médico del Uruguay (CASMU) Departamento de Cardiología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Facultad de Ciencias UA Instituto de Biología Departamento de Citogenética]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto de Investigaciones Biológicas Clemente Estable. Departamento de Citogenética ]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto de Investigaciones Biológicas Clemente Estable Departamento de Citogenética ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A05">
<institution><![CDATA[,Centro de Asistencia del Sindicato Médico del Uruguay (CASMU) Departamento de Citogenética Unidad Diabetes]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2004</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2004</year>
</pub-date>
<volume>19</volume>
<numero>2-3</numero>
<fpage>81</fpage>
<lpage>87</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202004000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202004000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202004000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La hiperhomocisteinemia es considerada como un factor de riesgo para las enfermedades vasculares en la población general. Sin embargo, su rol en el desarrollo de la cardiopatía isquémica (CI) no ha sido totalmente dilucidado. El objetivo fue determinar, si existe, en primera instancia una asociación entre la cardiopatía isquémica y los niveles elevados de homocisteína en plasma y posteriormente investigar la posible asociación entre la hiperhomocisteinemia y la diabetes mellitus tipo 2. Se analizó la información de 204 pacientes atendidos en consultorios dependientes del CASMU con una edad promedio de 61,2&plusmn;10,8 años. Se siguieron los criterios de las guías de Task Force y ADA para el diagnóstico de cardiopatía isquémica y diabetes, respectivamente. Se tomaron valores entre 5-15 &micro;moles/lt de homocisteína plasmática como normales. Los pacientes fueron clasificados en dos grupos: con cardiopatía isquémica (CCI) y sin cardiopatía isquémica (SCI). En las comparaciones realizadas entre los grupos se observaron diferencias significativas en la distribución de los niveles de homocisteína plasmática entre los individuos CCI y SCI (p<0,001). A su vez, se observó una asociación entre los valores de hiperhomocisteinemia y la CI (OR=2,66). Por otra parte, la ausencia de diferencias significativas entre diabéticos y no diabéticos con CI estaría indicando que la diabetes y la hiperhomocisteinemia serían dos características genéticas independientes o -dicho de otra forma- el hecho de ser diabético no altera la asociación entre la hiperhomocisteinemia y la cardiopatía isquémica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[A high plasmatic level of homocysteine is considered as a risk factor to vascular disease in the general population. However, the role of hyperhomocysteinaemia in the ischaemic heart disease development is not totally elucidated. The aim of our study was to determine in fist place, if in our sample there is an association between homocysteine levels and ischaemic heart disease and subsequently to investigate a possible association of hyperhomocysteinaemia to the presence of diabetes mellitus type 2. We analyzed the information of 204 patients attending to private health centers (depending from CASMU). All patients (61,2 &plusmn; 10,8 year olds average) were diagnosed as diabetic type 2 and ischaemic heart disease according to the ADA and Task Force guides criteria respectively. We took 5-15 &micro;mol/l homocysteine plasmatic value as normal. The patients were classified in two groups: with (CCI) and without ischaemic heart disease (SCI). We observed statistical significant differences in the distribution of homocysteine plasmatic levels between: CCI and SCI (p<0,001). We also observed an association between hyperhomocysteinaemia and CI (OR=2,66). In the other hand, non-significant statistical differences between diabetic and non diabetics patient with CI would be indicate that that hyperhomocysteinaemia and diabetes are two independent genetics factors; the diabetes condition do not alter the association between hyperhomocisteinaemia and CI.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[HIPERHOMOCISTEINEMIA]]></kwd>
<kwd lng="es"><![CDATA[HOMOCISTEíNA]]></kwd>
<kwd lng="es"><![CDATA[ISQUEMIA MIOCáRDICA]]></kwd>
<kwd lng="es"><![CDATA[DIABETES MELLITUS TIPO II]]></kwd>
<kwd lng="en"><![CDATA[HYPERHOMOCISTEINEMIA]]></kwd>
<kwd lng="en"><![CDATA[HOMOCYSTEINE]]></kwd>
<kwd lng="en"><![CDATA[MYOCARDIAL ISCHEMIA]]></kwd>
<kwd lng="en"><![CDATA[DIABETES MELLITUS TYPE II]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="left"><font color="#1f1a17" face="Verdana" size="2">ART&iacute;CULO ORIGINAL    <br> &nbsp;</font></p>              <p align="left"><b><font color="#1f1a17" face="Verdana" size="4">Asociaci&oacute;n entre hiperhomocisteinemia, cardiopat&iacute;a isqu&eacute;mica y diabetes tipo 2 </font></b></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">DRES. ENRIQUE SOTO <a name="-1_"></a></font><a href="#1_"> <font color="#1f1a17" face="Verdana" size="2"><sup>1</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, ADRIANA MIMBACAS<a name="-2_"></a><a name="-3_"></a> <sup><a href="#2_">2</a>,<a href="#3_">3</a></sup>, LIC. CECILIA GASCUE </font><sup> <font color="#1f1a17" face="Verdana" size="2"><a name="-4_"></a></font></sup> <font face="Verdana" size="2"></a></font><a href="#4_"> <font color="#1f1a17" face="Verdana" size="2"><sup>4</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, DRES. GERARDO JAVIEL </font><sup><font color="#1f1a17" face="Verdana" size="2"><a name="-5_"></a></font></sup> <font face="Verdana" size="2"></a></font><a href="#5_"> <font color="#1f1a17" face="Verdana" size="2"><sup>5</sup></font></a><font color="#1f1a17" face="Verdana" size="2">,     <br>         RITA FERRERO <a name="-6_"></a></font><a href="#6_"> <font color="#1f1a17" face="Verdana" size="2"><sup>6</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, GRACIELA VITARELLA<a name="-7_"></a> </font><a href="#7_"> <font color="#1f1a17" face="Verdana" size="2"><sup>7</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, HORACIO CARDOSO </font><sup><font color="#1f1a17" face="Verdana" size="2"><a name="-8_"></a></font></sup> <font face="Verdana" size="2"></a></font><a href="#8_"> <font color="#1f1a17" face="Verdana" size="2"><sup>8</sup></font></a></p>              <p><font color="#1f1a17" face="Verdana" size="2"><a name="1_"></a> <a href="#-1_">1</a>. M&eacute;dico del Centro de Asistencia del Sindicato M&eacute;dico del Uruguay (CASMU), Cardiolog&iacute;a.    <br>     <a name="2_"></a>    <a href="#-2_">2</a>. Asistente del Departamento de Citogen&eacute;tica, UA Instituto de Biolog&iacute;a, Facultad de Ciencias.    <br>     <a name="3_"></a>    <a href="#-3_">3</a>. Investigador Asociado del Departamento de Citogen&eacute;tica, Instituto de Investigaciones Biol&oacute;gicas Clemente Estable.    <br>     <a name="4_"></a>    <a href="#-4_">4</a>. Becaria del Departamento de Citogen&eacute;tica, Instituto de Investigaciones Biol&oacute;gicas Clemente Estable.    <br>     <a name="5_"></a>    <a href="#-5_">5</a>. M&eacute;dico del Centro de Asistencia del Sindicato M&eacute;dico del Uruguay (CASMU), Unidad Diabetes.    ]]></body>
<body><![CDATA[<br>     <a name="6_"></a>    <a href="#-6_">6</a>. M&eacute;dico del Centro de Asistencia del Sindicato M&eacute;dico del Uruguay (CASMU), Medicina General.    <br>     <a name="7_"></a>    <a href="#-7_">7</a>. M&eacute;dico del Centro de Asistencia del Sindicato M&eacute;dico del Uruguay (CASMU), Unidad Diabetes.    <br>     <a name="8_"></a>    <a href="#-8_">8</a>. Jefe del Departamento de Citogen&eacute;tica, Instituto de Investigaciones Biol&oacute;gicas Clemente Estable.    <br>         <b>Correspondencia: </b>Dra. Adriana Mimbacas. Instituto de Investigaciones Biol&oacute;gicas Clemente Estable. Avenida Italia 3318. Montevideo, Uruguay. E-mail: </font><a href="mailto:abmg@iibce.edu.uy"> <font color="#1f1a17" face="Verdana" size="2">abmg@iibce.edu.uy</font></a><font color="#1f1a17" face="Verdana" size="2">. </font></p>     <p align="left"></p>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>RESUMEN</b> </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">La hiperhomocisteinemia es considerada como un factor de riesgo para las enfermedades vasculares en la poblaci&oacute;n general. Sin embargo, su rol en el desarrollo de la cardiopat&iacute;a isqu&eacute;mica (CI) no ha sido totalmente dilucidado. El objetivo fue determinar, si existe, en primera instancia una asociaci&oacute;n entre la cardiopat&iacute;a isqu&eacute;mica y los niveles elevados de homociste&iacute;na en plasma y posteriormente investigar la posible asociaci&oacute;n entre la hiperhomocisteinemia y la diabetes mellitus tipo 2. Se analiz&oacute; la informaci&oacute;n de 204 pacientes atendidos en consultorios dependientes del CASMU con una edad promedio de 61,2&plusmn;10,8 a&ntilde;os. Se siguieron los criterios de las gu&iacute;as de Task Force y ADA para el diagn&oacute;stico de cardiopat&iacute;a isqu&eacute;mica y diabetes, respectivamente. Se tomaron valores entre 5-15 &micro;moles/lt de homociste&iacute;na plasm&aacute;tica como normales. Los pacientes fueron clasificados en dos grupos: con cardiopat&iacute;a isqu&eacute;mica &nbsp;(CCI) y sin cardiopat&iacute;a isqu&eacute;mica (SCI). En las comparaciones realizadas entre los grupos se observaron diferencias significativas en la distribuci&oacute;n de los niveles de homociste&iacute;na plasm&aacute;tica entre los individuos CCI y SCI (p&lt;0,001). A su vez, se observ&oacute; una asociaci&oacute;n entre los valores de hiperhomocisteinemia y la CI (OR=2,66). Por otra parte, la ausencia de diferencias significativas entre diab&eacute;ticos y no diab&eacute;ticos con CI estar&iacute;a indicando que la diabetes y la hiperhomocisteinemia ser&iacute;an dos caracter&iacute;sticas gen&eacute;ticas independientes o &ndash;dicho de otra forma&ndash; el hecho de ser diab&eacute;tico no altera la asociaci&oacute;n entre la hiperhomocisteinemia y la &nbsp;cardiopat&iacute;a isqu&eacute;mica. </font></p>              <p align="left"><font color="#000000" face="Verdana" size="2">Palabras clave:</font><font color="#1f1a17" face="Verdana" size="2">&nbsp;&nbsp;&nbsp;&nbsp;</font></p>     <p align="left"><font color="#1f1a17" face="Verdana" size="2">&nbsp; &nbsp; HIPERHOMOCISTEINEMIA    <br>         &nbsp;&nbsp;&nbsp;&nbsp;HOMOCISTE&iacute;NA    ]]></body>
<body><![CDATA[<br>         &nbsp;&nbsp;&nbsp;&nbsp;ISQUEMIA MIOC&aacute;RDICA    <br>         &nbsp;&nbsp;&nbsp;&nbsp;DIABETES MELLITUS TIPO II</font></p>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>SUMMARY</b> </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">A high plasmatic level of homocysteine is considered as a risk factor to vascular disease in the general population. However, the role of hyperhomocysteinaemia in the ischaemic heart disease development is not totally elucidated. The aim of our study was to determine in fist place, if in our sample there is an association between homocysteine levels and ischaemic heart disease and subsequently to investigate a possible association of hyperhomocysteinaemia to the presence of diabetes mellitus type 2.    <br>         We analyzed the information of 204 patients attending to private health centers (depending from CASMU). All patients (61,2 &plusmn; 10,8 year olds average) were diagnosed as diabetic type 2 and ischaemic heart disease according to the ADA and Task Force guides criteria respectively. We took 5-15 &micro;mol/l homocysteine plasmatic value as normal.    <br>         The patients were classified in two groups: with (CCI) and without ischaemic heart disease (SCI). We observed statistical significant differences in the distribution of</font><font color="#ff0000" face="Verdana" size="2"> </font> <font color="#1f1a17" face="Verdana" size="2">homocysteine plasmatic levels between: CCI and SCI (p&lt;0,001). We also observed an association between hyperhomocysteinaemia and CI (OR=2,66). In the other hand, non-significant statistical differences between diabetic and non diabetics patient with CI would be indicate that that hyperhomocysteinaemia and diabetes are two independent genetics factors; the diabetes condition do not alter the association between hyperhomocisteinaemia and CI. </font></p>              <p align="left"><font color="#000000" face="Verdana" size="2">Key words:&nbsp;&nbsp;&nbsp;&nbsp;</font></p>     <p align="left"><font color="#1f1a17" face="Verdana" size="2">&nbsp; &nbsp; HYPERHOMOCISTEINEMIA    <br>         &nbsp;&nbsp;&nbsp;&nbsp;HOMOCYSTEINE    <br>         &nbsp;&nbsp;&nbsp;&nbsp;MYOCARDIAL ISCHEMIA    ]]></body>
<body><![CDATA[<br>         &nbsp;&nbsp;&nbsp;&nbsp;DIABETES MELLITUS TYPE II </font></p>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>    <br>             <br>         INTRODUCCI&Oacute;N</b> </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">En estudios epidemiol&oacute;gicos se demostr&oacute; la existencia de una asociaci&oacute;n entre niveles altos de homociste&iacute;na y aumento del riesgo cardiovascular <a name="-1"></a><a name="-2"></a><a name="-3"></a><sup>(<a href="#1">1</a>-<a href="#3">3</a>)</sup>. Estas evidencias sumadas a los datos experimentales sugieren que la hiperhomocisteinemia podr&iacute;a ser un factor adicional asociado a enfermedades cardiovasculares <sup><a name="-4"></a><a name="-5"></a><a name="-6"></a>(<a href="#1">1</a>, <a href="#4">4</a>-<a href="#6">6</a>)</sup>. Aunque esta asociaci&oacute;n parece ser fuerte e independiente de otros factores de riesgo, no todos los estudios dan resultados similares <a name="-7"></a><a name="-8"></a><a name="-9"></a><a name="-10"></a><a name="-11"></a><sup>(<a href="#7">7</a>-<a href="#11">11</a>)</sup>. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Por otro lado, es sabido que los pacientes con diabetes tienen una incidencia aumentada de enfermedades vasculares <a name="-12"></a><sup>(<a href="#12">12</a>)</sup>. M&uacute;ltiples factores contribuyen para aumentar este riesgo <sup><a name="-13"></a>(<a href="#13">13</a>)</sup>. De un tercio a un medio de las enfermedades vasculares que ocurren en los diab&eacute;ticos no son explicables por los factores de riesgo tradicionales <a name="-14"></a><sup>(<a href="#1">1</a>,<a href="#14">14</a>)</sup>. Los procesos ateroscler&oacute;ticos en pacientes de alto riesgo comienzan antes que el diagn&oacute;stico de diabetes se haya establecido: un aumento del riesgo para enfermedad coronaria arterial ocurre en el estado prediab&eacute;tico o de intolerancia a la glucosa (incrementos de dos a tres veces) y en pacientes diab&eacute;ticos (cuatro veces) <sup>(<a href="#13">13</a>)</sup>. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Por esta raz&oacute;n planteamos determinar en nuestra muestra si existe, en primera instancia, una asociaci&oacute;n entre la cardiopat&iacute;a isqu&eacute;mica y los niveles elevados de homociste&iacute;na en plasma y posteriormente analizar qu&eacute; sucede en los pacientes con diabetes mellitus tipo 2. </font></p>              <p><font face="Verdana" size="2">    <br>         </font>         </p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>MATERIAL Y M&eacute;TODO</b> </font></p>          <font color="#1f1a17" face="Verdana" size="2">Se analiz&oacute; la informaci&oacute;n de las fichas m&eacute;dicas de seis consultorios dependientes del Centro de Asistencia del Sindicato M&eacute;dico del Uruguay (CASMU). Del total de fichas se seleccionaron 204 pacientes consecutivos atendidos entre los a&ntilde;os 2001 y 2003. A todos los pacientes seleccionados se les estudi&oacute;: a) presencia o ausencia de cardiopat&iacute;a isqu&eacute;mica demostrada, documentada seg&uacute;n los criterios diagn&oacute;sticos de infarto de miocardio del Report of the ACC/AHA Task Force on Practice Guidelines Committee on Manegement of Acute Myocardial Infarction <a name="-15"></a><sup>(<a href="#15">15</a>)</sup> o cineangiocoronariograf&iacute;a, o ambas (para el cateterismo se consideraron lesiones cr&iacute;ticas aquellas que ten&iacute;an una disminuci&oacute;n significativa del flujo: reducci&oacute;n del di&aacute;metro en 50% o de su secci&oacute;n en al menos 70%), b) presencia o ausencia de diabetes seg&uacute;n los criterios del Report of Committee Expert American Diabetes Association <sup>(<a href="#12">12</a>)</sup>. Se utilizaron los siguientes criterios de exclusi&oacute;n: a) individuos a los que no se les haya realizado la dosificaci&oacute;n de homociste&iacute;na, b) quienes no tuviesen realizados estudios para cardiopat&iacute;a isqu&eacute;mica, c) individuos portadores de insuficiencia renal. Todos los pacientes fueron controlados peri&oacute;dicamente por un cardi&oacute;logo y un diabet&oacute;logo durante los tres a&ntilde;os que abarc&oacute; este estudio. </font> <font face="Verdana" size="2">             ]]></body>
<body><![CDATA[<br>                </font>                <font color="#1f1a17" face="Verdana" size="2">La homocisteinemia fue evaluada mediante radioinmunoensayo con luz fluorescente polarizada, tomando como valores de referencia normales 5-15 &micro;moles/lt. Los pacientes fueron clasificados inicialmente en dos grupos: con cardiopat&iacute;a isqu&eacute;mica y sin cardiopat&iacute;a isqu&eacute;mica (CCI y SCI, respectivamente). Los an&aacute;lisis estad&iacute;sticos fueron realizados utilizando los paquetes estad&iacute;sticos STATA 5,0 <sup><a name="-16"></a>(<a href="#16">16</a>)</sup>, SSPS 10,0 <a name="-17"></a><sup>(<a href="#17">17</a>) </sup>y EPIINFO 6,0 <sup><a name="-18"></a>(<a href="#18">18</a>)</sup>. Se realiz&oacute; el an&aacute;lisis exploratorio de los datos para obtener los valores estad&iacute;sticos m&aacute;s empleados. Se utilizaron el test de empleados de varianza y las pruebas de contraste de la normalidad para analizar el comportamiento de las poblaciones. Se test&oacute; la independencia de las muestras mediante el test de Kolmogorov-Smirnov y la prueba U de Mann-Whitney<sup>(<a href="#17">17</a>)</sup>. La distribuci&oacute;n de los niveles de homociste&iacute;na fue comparada mediante el test de c<sup>2</sup>. Mediante tablas de contingencia de 2 x 2 se evalu&oacute; la asociaci&oacute;n de la hiperhomocisteinemia con la cardiopat&iacute;a isqu&eacute;mica utilizando el programa EPIINFO 6,0 <sup>(<a href="#18">18</a>)</sup>. Se calcul&oacute; el odds ratio (OR) utilizando el mismo programa. </font>             <p><font face="Verdana" size="2">    <br>         </font>         </p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>RESULTADOS</b> </font></p>                <p><font color="#1f1a17" face="Verdana" size="2">De las 204 fichas analizadas, 125 pacientes presentaron cardiopat&iacute;a isqu&eacute;mica demostrada y 79 no desarrollaron esta complicaci&oacute;n hasta el momento de este estudio. En la <a href="#tabla1">tabla 1</a> se muestran la media, el desv&iacute;o est&aacute;ndar de la edad y los niveles de homociste&iacute;na en los grupos analizados.</font></p>        <font color="#1f1a17" face="Swis721 LtCn BT" size="1"><multicol gutter="18" cols="2"></multicol></font> <font face="Verdana" size="2">    <br>       <a name="tabla1"></a><img style="width: 479px; height: 136px;" alt="" src="/img/revistas/ruc/v19n2-3/2-3a03t1.JPG">    <br>       </font>           <p align="left"><font color="#1f1a17" face="Verdana" size="2">La distribuci&oacute;n de los niveles de homociste&iacute;na present&oacute; diferencias significativas entre las dos poblaciones (c<sup>2</sup>= 11,15, p&lt;0,001). La distribuci&oacute;n poblacional de estos grupos analizados (SCI y CCI) mostr&oacute; una distribuci&oacute;n no gaussiana de las mismas, por lo cual, para demostrar la diferente dispersi&oacute;n, se utilizaron los test de Kolmogorov-Smirnov y la prueba U de Mann-Whitney<sup>(16)</sup> (p&lt;0,05). En la <a href="/img/revistas/ruc/v19n2-3/2-3a03f1.JPG">figura 1</a> se muestra la distribuci&oacute;n de los valores de homociste&iacute;na en &micro;mol/lt de estos dos grupos. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Se analiz&oacute; mediante el programa EPIINFO 6,0<sup>(<a href="#18">18</a>)</sup> la posible existencia de asociaci&oacute;n entre cardiopat&iacute;a isqu&eacute;mica e hiperhomocisteinemia. Se utilizaron tablas de contingencia de 2 x 2: CCI (55/70) SCI (18/61): c<sup>2</sup>= 9,48, p&lt;0,01. El odds ratio fue de 2,66 (IC 95%: 1,35-5,28). Entre los pacientes que ten&iacute;an niveles de homociste&iacute;na mayores de 15 &micro;mol/lt la frecuencia de cardiopat&iacute;a isqu&eacute;mica fue de 75,34% (figura 2). </font></p>             <p><font color="#1f1a17" face="Verdana" size="2">&nbsp;&nbsp;</font></p>              ]]></body>
<body><![CDATA[<p><a href="/img/revistas/ruc/v19n2-3/2-3a03f1.JPG"> <font color="#000000" face="Verdana" size="2">FIGURA 1</font></a><font color="#000000" face="Verdana" size="2">    <br>         Distribuci&oacute;n de los valores de homociste&iacute;na en pacientes con cardiopat&iacute;a isqu&eacute;mica (CCI) y sin cardiopat&iacute;a isqu&eacute;mica (SCI).</font><font color="#1f1a17" face="Verdana" size="2"> </font></p>              <p><font color="#1f1a17" face="Verdana" size="2">    <br>        </font></p>              <p><a href="/img/revistas/ruc/v19n2-3/2-3a03f2.JPG"> <font color="#000000" face="Verdana" size="2">FIGURA 2</font></a><font color="#000000" face="Verdana" size="2">    <br>         Porcentaje de individuos que presentan valores mayores de 15 &micro;mol/lt de homociste&iacute;na en plasma para los individuos con cardiopat&iacute;a isqu&eacute;mica (CCI) y sin cardiopat&iacute;a isqu&eacute;mica (SCI).</font><font color="#1f1a17" face="Verdana" size="2">&nbsp;</font></p>           <p>&nbsp;</p>        <font color="#1f1a17" face="Swis721 LtCn BT" size="1"><multicol gutter="18" cols="2"></multicol></font>      <p align="left"><font color="#1f1a17" face="Verdana" size="2">Para analizar el comportamiento de los valores de homociste&iacute;na en los individuos diab&eacute;ticos se procedi&oacute; a subdividir la muestra en diab&eacute;ticos y no diab&eacute;ticos. Basado en los criterios de la ADA <sup>(<a href="#12">12</a>)</sup>, de los 204 pacientes estudiados, 108 pacientes presentaban diagn&oacute;stico de diabetes mellitus tipo 2. De &eacute;stos, 55 presentaban cardiopat&iacute;a isqu&eacute;mica y 53 no desarrollaron esta complicaci&oacute;n hasta el momento del estudio. En la <a href="#tabla2">tabla 2</a> se muestran la media, el desv&iacute;o est&aacute;ndar de la edad y los niveles de homociste&iacute;na en los diab&eacute;ticos y no diab&eacute;ticos. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">La distribuci&oacute;n de los valores de homociste&iacute;na (figuras <a href="/img/revistas/ruc/v19n2-3/2-3a03f3.JPG">3</a> y <a href="/img/revistas/ruc/v19n2-3/2-3a03f4.JPG">4</a>) present&oacute; diferencias significativas entre los diab&eacute;ticos con y sin cardiopat&iacute;a isqu&eacute;mica (CI) al igual que para los no diab&eacute;ticos. No se hallaron diferencias significativas entre diab&eacute;ticos y no diab&eacute;ticos con CI y diab&eacute;ticos y no diab&eacute;ticos sin CI (<a href="/img/revistas/ruc/v19n2-3/2-3a03t3.JPG">tabla 3</a>). </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">La tabla de contingencia de 2 x 2 para los diab&eacute;ticos mostr&oacute; un OR = 1,95 (IC 95%: 0,78-4,97) y para los no diab&eacute;ticos un OR = 3,33 (IC 95%: 1,09-10,6). </font></p>              ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2">Al realizar las comparaciones entre diab&eacute;ticos con CI y no diab&eacute;ticos con CI no se observaron diferencias significativas. </font></p>              <p><font color="#1f1a17" face="Verdana" size="2">    <br>         </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2"><b>DISCUSI&oacute;N</b> </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Aumentos de la concentraci&oacute;n de homociste&iacute;na plasm&aacute;tica han sido descritos en pacientes con enfermedad coronaria arterial, en pacientes con complicaciones cardiovasculares de la diabetes tipo 2 y en pacientes que presentan ambas afecciones <a name="-19"></a><a name="-20"></a><a name="-21"></a><a name="-22"></a><sup>(<a href="#19">19</a>-<a href="#22">22</a>)</sup>. Se ha sugerido que la homociste&iacute;na est&aacute; involucrada en la promoci&oacute;n de la actividad plaquetaria, hipercoagulabilidad, estr&eacute;s oxidativo, disfunci&oacute;n endotelial, oxidaci&oacute;n y peroxidaci&oacute;n de l&iacute;pidos <sup><a name="-23"></a><a name="-24"></a>(<a href="#23">23</a>,<a href="#24">24</a>)</sup>. Sin embargo, los mecanismos exactos por los cuales la homociste&iacute;na causa aterog&eacute;nesis no han sido bien dilucidados. </font></p>               <p align="left"><font color="#000000" face="Verdana" size="2">    <br>       </font></p>       <font face="Verdana" size="2">       <a name="tabla2"></a><img style="width: 523px; height: 196px;" alt="" src="/img/revistas/ruc/v19n2-3/2-3a03t2.JPG">    <br>       </font>           <p align="left">&nbsp;</p>              <p align="left"><a href="/img/revistas/ruc/v19n2-3/2-3a03f3.JPG"> <font color="#000000" face="Verdana" size="2">FIGURA 3</font></a><font color="#000000" face="Verdana" size="2">    ]]></body>
<body><![CDATA[<br>         Distribuci&oacute;n de los valores de homociste&iacute;na en pacientes diab&eacute;ticos.    <br>         DSCI: diab&eacute;ticos sin cardiopat&iacute;a isqu&eacute;mica;     <br>         DCCI: diab&eacute;ticos con cardiopat&iacute;a isqu&eacute;mica.</font><font color="#1f1a17" face="Verdana" size="2"> </font></p>              <p><font color="#1f1a17" face="Verdana" size="2">    <br>        </font></p>        <font color="#1f1a17" face="Swis721 LtCn BT" size="1"><multicol gutter="18" cols="2"></multicol></font>      <p align="left"><font color="#1f1a17" face="Verdana" size="2">Por otra parte, es sabido que la diabetes per se est&aacute; asociada a un aumento del riesgo de enfermedad cardiovascular siendo esta &uacute;ltima la principal causa de mortalidad en los diab&eacute;ticos <sup><a name="-25"></a><a name="-26"></a>(<a href="#25">25</a>,<a href="#26">26</a>)</sup>. Parte de este riesgo aumentado se explica por los par&aacute;metros ya establecidos de riesgo cardiovascular (intolerancia a la glucosa, &iacute;ndice de masa corporal [BMI] aumentado, hipertensi&oacute;n, hipertrigliceridemia, disminuci&oacute;n de HDL). Sin embargo, a&uacute;n es materia de debate el hecho de que la correcci&oacute;n de una hiperglicemia en individuos prediab&eacute;ticos lleve impl&iacute;cita una disminuci&oacute;n del riesgo <sup><a name="-27"></a>(<a href="#27">27</a>)</sup>. Por esta raz&oacute;n ser&iacute;a imprescindible analizar otros factores que pudieran estar contribuyendo a sumar efectos para el desarrollo de cardiopat&iacute;a isqu&eacute;mica. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Nuestros resultados mostraron que al comparar los grupos con y sin cardiopat&iacute;a isqu&eacute;mica las curvas de distribuci&oacute;n de los niveles de homociste&iacute;na presentan diferencias significativas. De 125 pacientes que presentaron hiperhomocisteinemia, 75,34% ten&iacute;an cardiopat&iacute;a isqu&eacute;mica, los restantes (24,66%) hasta el momento no han desarrollado esta complicaci&oacute;n. Cuando analizamos la asociaci&oacute;n entre la hiperhomocisteinemia y la cardiopat&iacute;a se observ&oacute; un odds ratio de 2,66 con un intervalo de confianza significativo, lo que estar&iacute;a indicando la existencia de asociaci&oacute;n entre los valores de homociste&iacute;na elevados y la cardiopat&iacute;a isqu&eacute;mica. </font></p>             <p><font color="#1f1a17" face="Verdana" size="2">&nbsp;    <br>         </font></p>              <p><a href="/img/revistas/ruc/v19n2-3/2-3a03f4.JPG"> <font color="#000000" face="Verdana" size="2">FIGURA 4</font></a><font color="#000000" face="Verdana" size="2">    ]]></body>
<body><![CDATA[<br>         Distribuci&oacute;n de los valores de homociste&iacute;na en la muestra de no diab&eacute;ticos.    <br>         NDSCI: no diab&eacute;ticos sin cardiopat&iacute;a isqu&eacute;mica;     <br>         NDCCI: no diab&eacute;ticos con cardiopat&iacute;a isqu&eacute;mica.</font><font color="#1f1a17" face="Verdana" size="2"> </font></p>              <p align="left"><a href="/img/revistas/ruc/v19n2-3/2-3a03t3.JPG"> <font color="#000000" face="Verdana" size="2">TABLA 3</font></a><font color="#000000" face="Verdana" size="2">    <br>           <br>       </font></p>              <font color="#1f1a17" face="Swis721 LtCn BT" size="1"><multicol gutter="18" cols="2"></multicol></font>      <p align="left"><font color="#1f1a17" face="Verdana" size="2">Al realizar la subdivisi&oacute;n de la muestra, el hecho de no existir diferencias significativas entre los diab&eacute;ticos y no diab&eacute;ticos con CI nos estar&iacute;a indicando que en el caso de la hiperhomocisteinemia el hecho de ser diab&eacute;tico no altera la asociaci&oacute;n entre la hiperhomocisteinemia y la CI. </font></p>              <p align="left"><font color="#1f1a17" face="Verdana" size="2">Observamos que en los no diab&eacute;ticos existir&iacute;a una clara asociaci&oacute;n (OR= 3,33) entre el factor analizado y el evento. Sin embargo, al analizar la muestra de diab&eacute;ticos se observ&oacute; tambi&eacute;n un valor de odds ratio mayor a 1, pero los intervalos de confianza no presentaron diferencia estad&iacute;sticamente significativa. Este &uacute;ltimo dato podr&iacute;a ser explicado por dos razones: a) la presencia de individuos falso negativos originada por un mayor n&uacute;mero de casos que desarrollar&iacute;an tard&iacute;amente la cardiopat&iacute;a isqu&eacute;mica, o b) al ser la diabetes una enfermedad multifactorial en la cual participan muchos factores desencadenantes de complicaciones cr&oacute;nicas, la hiperhomocisteinemia ser&iacute;a un factor adicional pero no principal para el desarrollo de cardiopat&iacute;a isqu&eacute;mica. </font></p>              <p><font color="#1f1a17" face="Verdana" size="2">    <br>         </font></p>              ]]></body>
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