<?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>0253-570X</journal-id>
<journal-title><![CDATA[Revista de Salud Animal]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Salud Anim.]]></abbrev-journal-title>
<issn>0253-570X</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Sanidad Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0253-570X2019000300006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morfología y polaridad de la onda T del electrocardiograma en el ganado bovino]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphology and polarity of the T wave of the electrocardiogram in cattle]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pompa Núñez]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Agraria de La Habana (UNAH) ¨Fructuoso Rodríguez Pérez¨  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>41</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0253-570X2019000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0253-570X2019000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0253-570X2019000300006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de esta investigación fue determinar en qué áreas de la superficie corporal del bovino deben ser colocados los electrodos para registrar ondas T con polaridad y morfología estables, al emplear derivaciones bipolares y monopolares para detectar alteraciones en la conducción del impulso de repolarización ventricular. Se utilizaron 100 animales de uno y de otro sexo, de diferentes grupos etarios. Se codificó numéricamente cada forma de onda T y se clasificó su polaridad. Se observaron 16 formas diferentes de ondas T, las cuales presentan cuatro tipos de polaridad: positiva, negativa, bifásica +/- y bifásica -/+. En la derivación bipolar de hombro IH, la onda T resultó, en gran proporción, negativa o bifásica +/-; en las restantes derivaciones bipolares fue positiva o bifásica -/+. En las derivaciones monopolares basales del corazón, la onda T fue negativa o en algunos casos bifásicas +/-. En las derivaciones apicales se obtuvo siempre polaridad positiva o bifásica -/+ y se registraron de cuatro a seis formas diferentes. Se concluye que, en las áreas situadas hacia la base o hacia el ápice del corazón, se pueden emplear derivaciones que originan registros electrocardiográficos con gran estabilidad en la polaridad de la onda T y en las que la cantidad de formas diferentes detectadas es muy reducida, con gran predominio de la puntiaguda, por lo que se convierten en una referencia muy útil para diagnosticar las alteraciones en la conducción del impulso de repolarización por los ventrículos cardíacos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The aim of this research was to determine in which areas of the bovine body surface the electrodes should be placed to record T waves with stable polarity and morphology by using bipolar and unipolar leads to detect alterations in the conduction of the ventricular repolarization impulse. One hundred animals of both sexes from different age groups were used. Each T-wave form was numerically coded and its polarity was classified. Sixteen different forms of T waves were observed, presenting four types of polarity: positive, negative, biphasic +/- and biphasic -/+. In the bipolar shoulder lead IH, the T wave was largely negative or biphasic +/-; and it was positive or biphasic -/+ in the remaining bipolar leads. The T-wave was negative or in some cases biphasic +/- in the unipolar basal leads of the heart. Positive or biphasic polarity was always obtained in the apical leads -/+ and four to six different forms were recorded. It is concluded that, in the areas located towards the base or the apex of the heart, leads can be used originating electrocardiographic records with great stability in the polarity of the T wave and in which the quantity of different forms detected is very reduced, with great predominance of the pointed one, so that they become a very useful reference to diagnose the alterations in the conduction of the repolarization impulse through the cardiac ventricles.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Onda T]]></kwd>
<kwd lng="es"><![CDATA[polaridad]]></kwd>
<kwd lng="es"><![CDATA[morfología]]></kwd>
<kwd lng="es"><![CDATA[raza Holstein]]></kwd>
<kwd lng="es"><![CDATA[derivaciones]]></kwd>
<kwd lng="en"><![CDATA[T-wave]]></kwd>
<kwd lng="en"><![CDATA[polarity]]></kwd>
<kwd lng="en"><![CDATA[morphology]]></kwd>
<kwd lng="en"><![CDATA[Holstein race]]></kwd>
<kwd lng="en"><![CDATA[leads]]></kwd>
</kwd-group>
</article-meta>
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