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May 1969

The Muscle Guard for Mitral Valve Prostheses

Author Affiliations

Los Angeles
From the Cardiovascular Research Laboratory, University of Southern California School of Medicine and the Los Angeles County-University of Southern California Medical Center, and St. Vincent's Hospital, Los Angeles.

Arch Surg. 1969;98(5):626-628. doi:10.1001/archsurg.1969.01340110118013

In 1964, experimental work was performed in the laboratory on the use of disc valves for mitral and tricuspid valve replacement. The reason for this interest in the disc valve was that in some patients with a small ventricular cavity, thrombosis of the ball valve prothesis occurred.1 It was hoped that the low profile valve would significantly decrease this complication of valve thrombosis as well as the incidence of peripheral embolization. Forty-four patients were discharged home with this early disc valve. These disc valves with a large amount of exposed metal and without a muscle guard were inserted into the mitral area from September 1965, to April 1967. There were six patients with peripheral emboli in this group for an incidence of 14%. One patient died ten months following insertion of the valve, with thrombosis of the valve the etiologic factor. At the time of death, there was pronounced

Kay, J.H., et al:  Experimental Mitral Valve Replacement With a New Disc Valve , Ann Thorac Surg 2:485-498 ( (June) ) 1966.Article
Braunwald, N.S., and Bonchek, L.I.:  Prevention of Thrombus Formation on Rigid Prosthetic Heart Valves by the Ingrowth of Autogenous Tissue , J Thorac Cardiovasc Surg 54:630-638 ( (Nov) ) 1967.
Miyamoto, T., et al:  Modified Disc Valves in Calves—Experimental Results , Surg Forum 19:98-99, 1968.
Kay, J.H., et al: Experiences With the Kay-Shiley Disc Valve, Proceedings of the Second National Conference on Prosthetic Heart Valves, 1968, to be published.
Dykstra, P., et al: The Prevention of Atrioventricular Aneurysm During Mitral Valve Replacement, Proceedings of the Second National Conference on Prosthetic Heart Valves, 1968, to be published.