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Anesth Analg 1989; 68:385-387
© 1989 International Anesthesia Research Society
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Phonocardiography as a Monitor of Cardiac Performance During Anesthesia

Peter B. Hansen, MD, Aldo A. Luisada, MD, David J. Miletich, PhD, and Ronald F. Albrecht, MD

Department of Anesthesiology and the Cardiovascular Institute, Michael Reese Hospital & Medical Center, Chicago, and the Pritzker School of Medicine, University of Chicago, Chicago, Illinois.

The usefulness of phonocardiography as a monitor of cardiac performance during anesthesia was investigated in six dogs. Anesthetic depression by halothane, isoflurane and nitrous oxide was demonstrated by the phonocardiogram. Likewise, the stimulating effect of dopamine clearly showed in the recordings. Changes in the amplitude of the first heart sound were found to correlate closely with changes in the maximum rate of rise of left ventricular pressure (r=0.9551, P < 0.001). Simultaneous changes in cardiac output and arterial pressure also occurred.

Cardiac depression from anesthetics and/or disease is a major concern during anesthesia. Perioperative phonocardiography, a simple and noninvasive procedure, merits further investigation as a possible monitor of cardiac performance.

Key Words: MEASUREMENT TECHNIQUES, phonocardiography • HEART, phonocardiography
Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins and Stanford University Libraries' HighWire Press®. Copyright 1989 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 1989 by the International Anesthesia Research Society.