<?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>S1405-99402017000400326</article-id>
<article-id pub-id-type="doi">10.1016/j.acmx.2016.12.002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El entrenamiento físico restaura la variabilidad del ritmo cardiaco en la insuficiencia cardiaca. Revisión sistemática]]></article-title>
<article-title xml:lang="en"><![CDATA[The exercise training restores the heart rate variability in heart failure patients. A systematic review]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segovia]]></surname>
<given-names><![CDATA[Victoria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Manterola]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[Marcelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Núñez]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad San Sebastián Facultad de Ciencias de la Salud Escuela de Kinesiología]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Católica del Norte Facultad de Medicina ]]></institution>
<addr-line><![CDATA[Coquimbo ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de La Frontera  ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Chile  ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Concepción Facultad de Ciencias Biológicas Departamento de Fisiología]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad San Sebastián Facultad de Ciencias de la Salud Escuela de Kinesiología]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>87</volume>
<numero>4</numero>
<fpage>326</fpage>
<lpage>335</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-99402017000400326&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-99402017000400326&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-99402017000400326&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las enfermedades cardiovasculares constituyen una causa importante de morbi-mortalidad en la población general. En este sentido el desbalance autonómico forma parte del cuadro fisiopatológico que subyace al desarrollo de estas enfermedades. El objetivo de este estudio fue determinar el efecto del entrenamiento físico sobre la variabilidad del ritmo cardiaco (VRC) en pacientes con insuficiencia cardiaca.  Metodología:  Se realizó una revisión sistemática de la literatura. Fueron considerados ensayos clínicos con asignación aleatoria, estudios cuasiexperimentales con grupo control equivalente, estudios cuasiexperimentales sin grupo control y con análisis pre- y postintervención, y estudios cruzados, con períodos de entrenamiento y desentrenamiento asignados de manera aleatoria. Se calcularon las diferencias medias estandarizadas entre los parámetros de VRC pre- y postintervención para el grupo control y experimental.  Resultados:  En el análisis intrasujeto del grupo control, no se observó significación estadística en las diferencias medias estandarizadas entre el valor preintervención y el postintervención de los parámetro de VRC. En el grupo experimental, las diferencias medias estandarizadas fueron estadísticamente significativas para la raíz cuadrada del promedio de las diferencias al cuadrado entre intervalos R-R adyacentes (+0.468 ± 0.215; p = 0.032) y las bandas de alta (HF) (0.934 ± 0.256; p &lt; 0.001) y baja (LF) (0.415 ± 0.096; p &lt; 0.001) frecuencia; así como para el índice LF/HF (&#8211;0.747 ± 0.369; p = 0.044). Por otra parte, tan solo 3 estudios entraron en el metaanálisis de estudios comparativos. En el metaanálisis de estudios comparativos se observó un efecto favorable al grupo experimental para las variables: LF/HF (&#8211;2.21 ± IC 95%: &#8211;3,83 a &#8211;0.60), HF y LF.  Conclusión:  El entrenamiento físico fue efectivo en mejorar la VRC y restableció el balance autonómico en pacientes con insuficiencia cardiaca.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Cardiovascular diseases are a significant cause of morbidity and mortality in the general population. In this sense, the autonomic imbalance is the cornerstone of the pathophysiology underlying the development of these diseases. The aim of this study was to determine the efficacy of exercise training on heart rate variability (HRV) in adult patients with chronic heart failure.  Methodology:  A systematic literature review was conducted in electronic databases. The considered studies were randomised clinical trials, quasi-experimental studies with non-randomised control group, quasi-experimental studies with analysis of pre- and post- intervention, and crossover studies with randomly assigned training and non-training periods. The standardised mean differences were calculated between pre- and post-intervention in both the control and experimental group.  Results:  Within-subject analysis of the control group showed no statistical significance in the standardised mean differences of HRV. In the experimental group, the standardised mean differences were positive for the root mean square of successive difference (+0.468 ± 0.215; P = .032), high frequency band (HF) (0.934 ± 0.256; P &lt; .001) and low frequency band (LF) (&lt; 0.415 ± 0.096; P = .001). Moreover, the standardised mean difference was negative for LF/HF (&#8211;0.747 ± 0.369, P = &lt;.044). On the other hand, only 3 studies entered the comparative meta-analysis. The effect of exercise training was favourable for the experimental group in LF/HF (&#8211;2.21 ± 95% CI: &#8211;3.83 to &#8211;0.60), HF, and LF.  Conclusion:  The exercise training was effective in increasing HRV and restoring the autonomic balance in patients with heart failure.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Entrenamiento]]></kwd>
<kwd lng="es"><![CDATA[Ejercicio]]></kwd>
<kwd lng="es"><![CDATA[Insuficiencia cardiaca]]></kwd>
<kwd lng="es"><![CDATA[Sistema nervioso autónomo]]></kwd>
<kwd lng="es"><![CDATA[Chile]]></kwd>
<kwd lng="en"><![CDATA[Training]]></kwd>
<kwd lng="en"><![CDATA[Exercise]]></kwd>
<kwd lng="en"><![CDATA[Heart failure]]></kwd>
<kwd lng="en"><![CDATA[Autonomic nervous system]]></kwd>
<kwd lng="en"><![CDATA[Chile]]></kwd>
</kwd-group>
</article-meta>
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