title: Studies of arrhythmias by 24-hour polygraphic recordings. II. Relationship between heart rate and sleep states.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004562:Electrocardiography; D004569:Electroencephalography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012894:Sleep Stages / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology