[Diurnal rhythm of heart activity in newborn infants according to days of life].
D000367:Age Factors; D002940:Circadian Rhythm; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D007231:Infant, Newborn
Sutochnyĭ ritm serdechnoĭ deiatel'nosti u novorozhdennykh po dniam zhizni.