Potential confounders of signal-averaged P-wave duration--strenuous exercise and catecholamines.
Department of Prevention and Sports Medicine, Klinikum rechts der Isar der Technische Universitaet Muenchen, Munich, Germany. scherr@sport.med.tum.de.
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D001341:Autonomic Nervous System / Q000187:drug effects*; D005260:Female; D006329:Heart Conduction System / Q000187:drug effects*; D006801:Humans; D008297:Male