title: The broken heart: noninvasive measurement of cardiac autonomic tone.
authors.affiliation: Cerebrovascular Program, Johns Hopkins Hospital, Baltimore, MD 21205.
authors.forename: S
authors.initials: S
authors.lastname: Oppenheimer
mesh_terms: D000367:Age Factors; D001341:Autonomic Nervous System / Q000503:physiopathology*; D016757:Death, Sudden, Cardiac / Q000209:etiology*; D006321:Heart / Q000294:innervation* / Q000503:physiopathology; D006334:Heart Function Tests / Q000379:methods; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D011187:Posture / Q000502:physiology; D013315:Stress, Psychological / Q000150:complications / Q000503:physiopathology