<?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>0120-5633</journal-id>
<journal-title><![CDATA[Revista Colombiana de Cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Colomb. Cardiol.]]></abbrev-journal-title>
<issn>0120-5633</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Colombiana de Cardiologia. Oficina de Publicaciones]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-56332009000400007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ondas J de Osborn en hipotermia: Presentación de un caso poco frecuente en el trópico]]></article-title>
<article-title xml:lang="en"><![CDATA[Osborn waves in hypothermia: One rare case in the tropic]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Universitario San Jorge de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2009</year>
</pub-date>
<volume>16</volume>
<numero>4</numero>
<fpage>182</fpage>
<lpage>184</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-56332009000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-56332009000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-56332009000400007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En 1953, el Doctor John Osborn describió la onda J en el electrocardiograma. La hipotermia (temperatura corporal menor a 35 grados centígrados) inicialmente se asocia a taquicardia sinusal, pero con temperaturas menores a 32,2 grados centígrados se inicia la bradicardia sinusal, asociada a prolongación progresiva del intervalo PR, el complejo QRS y el intervalo QTc. De otra parte, a temperaturas por debajo de 30 grados centígrados, 80% de los pacientes presenta ondas J o de Osborn, que consisten en una deflexión extra, al final del QRS, la cual se observa mejor en las derivaciones inferiores y laterales. Empeora a medida que la temperatura desciende y mejora en el momento en que al paciente se le incrementa su temperatura corporal. Este fenómeno no es raro en países con estaciones, pero en el trópico no es un hallazgo frecuente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Dr. John Osborn described J wave in the electrocardiogram 1953. Hypothermia (body temperature < 35°C) is initially associated with sinus tachycardia, but with temperatures < 32.2°C, sinus bradycardia associated to progressive prolongation of PR interval, QRS complex and QTc interval, appears. Otherwise, at temperatures below 30°C, 80% patients present J or Osborn waves consisting of an extra deflection at the end of QRS, best depicted in inferior and lateral leads. They become more prominent as the temperature drops and gradually disappear with re-warming. This phenomenon is not rare in countries with 4 seasons but is not common in the tropics.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ondas J]]></kwd>
<kwd lng="es"><![CDATA[hipotermia]]></kwd>
<kwd lng="es"><![CDATA[ondas de Osborn]]></kwd>
<kwd lng="es"><![CDATA[electrocardiograma]]></kwd>
<kwd lng="en"><![CDATA[J waves]]></kwd>
<kwd lng="en"><![CDATA[hypothermia]]></kwd>
<kwd lng="en"><![CDATA[Osborn waves]]></kwd>
<kwd lng="en"><![CDATA[electrocardiogram]]></kwd>
</kwd-group>
</article-meta>
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