Cardiac arrhythmia in premature infants.
D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D001341:Autonomic Nervous System / Q000254:growth & development / Q000503:physiopathology*; D001724:Birth Weight; D006339:Heart Rate; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000209:etiology*