The regulation of the heart rate during sleep.
D000818:Animals; D001341:Autonomic Nervous System / Q000502:physiology*; D002415:Cats; D004569:Electroencephalography; D004576:Electromyography; D005133:Eye Movements; D006329:Heart Conduction System / Q000502:physiology; D006339:Heart Rate; D012890:Sleep; D012894:Sleep Stages