title: Cardiac beat to beat variation: age related changes in the normal population and abnormalities in diabetics.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D003201:Computers; D003920:Diabetes Mellitus / Q000503:physiopathology; D003929:Diabetic Neuropathies / Q000503:physiopathology*; D004562:Electrocardiography; D006321:Heart / Q000294:innervation; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D010044:Outpatient Clinics, Hospital; D012119:Respiration; D014630:Vagus Nerve / Q000503:physiopathology; D014636:Valsalva Maneuver