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(Chest. 1963;44:11-17.)
© 1963 American College of Chest Physicians

A Phonocardiographic Study of Patients with Total Prosthetic Mitral Valve Replacement

Ralph S. Zitnik M.D.1 and Howard B. Burchell M.D.2

1 Mayo Clinic and Mayo Foundation
2 Section of Medicine

Phonocardiographic studies of six patients with Starr-Edwards ball-cage mitral valve prostheses revealed that the intervals between the Q wave and the closing valve sound (CVS) and between the aortic second sound (S2) and the opening valve sound (OVS) vary with the preceding R-R interval. The aortic S2-OVS interval was constant during respiration. Observed results are considered indicative of a small atrial-ventricular pressure gradient across the ball-cage valve. Increasing of the Q-CVS interval and decreasing of the aortic S2-OVS interval without a change in the preceding R-R interval suggest improvement of the cardiac status.






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Copyright © 1963 by the American College of Chest Physicians.