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  • Title: Assessment of ventricular function with an ambulatory left ventricular function monitor.
    Author: Ishibashi M, Tamaki N, Yasuda T, Taki J, Strauss HW.
    Journal: Circulation; 1991 Apr; 83(4 Suppl):II166-72. PubMed ID: 2009625.
    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.
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