No abstract available
MeSH terms
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Child
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Child, Preschool
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Electrocardiography
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Heart Block / complications*
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Heart Block / etiology
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Heart Block / therapy
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Heart Conduction System / physiopathology
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Heart Septal Defects, Ventricular / surgery
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Humans
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Male
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Pacemaker, Artificial
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Wolff-Parkinson-White Syndrome / etiology*