title: Cardiac rhythm in different stages of sleep and waking.
mesh_terms: D000328:Adult; D002648:Child; D004562:Electrocardiography; D005583:Fourier Analysis; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D007231:Infant, Newborn; D012890:Sleep / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology*