<?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>1405-9940</journal-id>
<journal-title><![CDATA[Archivos de cardiología de México]]></journal-title>
<abbrev-journal-title><![CDATA[Arch. Cardiol. Méx.]]></abbrev-journal-title>
<issn>1405-9940</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Cardiología Ignacio Chávez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-99402016000200140</article-id>
<article-id pub-id-type="doi">10.1016/j.acmx.2016.01.002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diferencias entre 2 electrocardiogramas sinusales como predictoras de fibrilación auricular: estudio de cohorte]]></article-title>
<article-title xml:lang="en"><![CDATA[Variations between 2 ECG as predictors of atrial fibrillation: Cohort study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Grande Ratti]]></surname>
<given-names><![CDATA[María Florencia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Posadas-Martínez]]></surname>
<given-names><![CDATA[María Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuffaro]]></surname>
<given-names><![CDATA[Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baum]]></surname>
<given-names><![CDATA[Analía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gomez]]></surname>
<given-names><![CDATA[Adrián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paltrinieri]]></surname>
<given-names><![CDATA[Máximo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Garbino]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Bernaldo de Quirós]]></surname>
<given-names><![CDATA[Fernán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maid]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernán Giunta]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Italiano de Buenos Aires  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital Italiano de Buenos Aires  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Hospital Italiano de Buenos Aires  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Hospital Italiano de Buenos Aires  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="A05">
<institution><![CDATA[,Hospital Italiano de Buenos Aires  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>86</volume>
<numero>2</numero>
<fpage>140</fpage>
<lpage>147</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-99402016000200140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-99402016000200140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-99402016000200140&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo Evaluar la asociación entre las diferencias de mediciones de 2 ECG separados en el tiempo, con el desarrollo de fibrilación auricular (FA).  Método Cohorte retrospectiva de 9,975 pacientes adultos, afiliados a la prepaga del Hospital Italiano de Buenos Aires, Argentina, con realización de al menos 2 ECG sinusales digitales entre 2006-2011. Se siguieron clínicamente para la detección de FA. Todas las mediciones electrocardiográficas y los deltas (diferencias entre los 2 ECG) fueron estandarizadas. Se estimaron los hazard ratio para desarrollo de FA, para cada delta de los distintos componentes electrocardiográficos utilizando un modelo de regresión de Cox.  Resultados Durante una mediana de seguimiento de 3,5 años se detectaron 189 episodios de FA. El delta FC, delta intervalo ST y delta amplitud onda P se asociaron significativamente a FA. Ajustado por características clínicas y mediciones de ECG basal, el hazard ratio ajustado para FA fue 0.86 (IC95%: 0.75-0.98, p = 0.024) para delta FC; 1.12 (IC95%0.98-1.27, p = 0.082) para delta intervalo ST; y 1.21 (IC95%: 1.05-1.38, p = 0.006) para delta amplitud onda P.  Conclusiones Las diferencias FC y amplitud onda P, entre mediciones de ECG, predicen FA en forma independiente de características clínicas y mediciones de ECG basal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objetive To evaluate the association between delta variations in the parameters of 2 sinusal ECG with atrial fibrillation (AF) onset.  Method Retrospective cohort of 9,975 adult patients and members of the prepaid system at Hospital Italiano de Buenos Aires from Argentina, who had at least 2 sinusal ECG between 2006 and 2011. Population was followed up for detection of AF. All measurements and electrocardiographic deltas (differences between the 2 ECG) were standardized. Hazard ratio (HR) was estimated for the development of AF for each delta of the different ECG parameters using a Cox regression model.  Results During a median follow up of 3.5 years, 189 patients (1.89%) developed AF. Heart rate delta, ST interval delta and P wave amplitude were predictors of AF. Hazard ratio Adjusted for clinical characteristics and ECGbasal values was 0,86 (CI95%: 0.75-0.98, p = 0.024) for heart rate delta, 1.12 (CI95%: 0.98-1.27, p = 0.082) for ST interval delta and 1.21 (CI95%: 1.05-1.38, p = 0.006) for P wave amplitude delta.  Conclusion Differences of heart rate and P wave amplitude between ECG's measurements may predict AF, independently of clinical features and ECGbasal values.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fibrilación auricular]]></kwd>
<kwd lng="es"><![CDATA[Electrocadiograma]]></kwd>
<kwd lng="es"><![CDATA[Taquiarritmias]]></kwd>
<kwd lng="es"><![CDATA[Argentina]]></kwd>
<kwd lng="en"><![CDATA[Atrial fibrillation]]></kwd>
<kwd lng="en"><![CDATA[Electrocardiography]]></kwd>
<kwd lng="en"><![CDATA[Tachyarrhythmia]]></kwd>
<kwd lng="en"><![CDATA[Argentina]]></kwd>
</kwd-group>
</article-meta>
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