title: Assessment of ventricular function with an ambulatory left ventricular function monitor.
abstract: Changes in ventricular function caused by activities of daily living, including standing, walking, stair climbing, and mental stress, were evaluated using a radionuclide device that recorded left ventricular function on a beat-by-beat basis. The ambulatory monitor was positioned over the patient's left ventricle after a gated blood pool scan. Monitoring revealed a 10% increase of left ventricular ejection fraction from baseline to brisk walking, an 18% increase during stair climbing, and a 6% increase with mental stress. In some subjects, however, the increase in ejection fraction during mental stress exceeded that during exercise.
authors.affiliation: Division of Nuclear Medicine, Massachusetts General Hospital, Boston 02114.
authors.forename: M
authors.initials: M
authors.lastname: Ishibashi
authors.forename: N
authors.initials: N
authors.lastname: Tamaki
authors.forename: T
authors.initials: T
authors.lastname: Yasuda
authors.forename: J
authors.initials: J
authors.lastname: Taki
authors.forename: H W
authors.initials: HW
authors.lastname: Strauss
mesh_terms: D000203:Activities of Daily Living; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology; D015716:Electrocardiography, Ambulatory; D015444:Exercise / Q000502:physiology; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D015635:Radionuclide Ventriculography / Q000295:instrumentation*; D013315:Stress, Psychological / Q000503:physiopathology; D016277:Ventricular Function, Left / Q000502:physiology*; D016138:Walking