[The electrocardiogram of the premature infant during the 1st 3 months of life].
D002648:Child; D004562:Electrocardiography; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology*; D019369:Life
ELECTROCARDIOGRAPHY/in infancy and childhood; INFANT, PREMATURE/physiology