[Establishment of diurnal rhythm of cardiac activity in newborns (electrocardiographic study)].
D002940:Circadian Rhythm; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn
Stanovlenie sutochnogo ritma deiatel'nosti serdtsa u novorozhdennykh (élektrokardiograficheskie issledovaniia)