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Ann Thorac Surg 1982;33:554-561
© 1982 The Society of Thoracic Surgeons

Articles

Late Follow-up of the Braunwald-Cutter Valve

R.A. Jonas, M.B., B.S., B.G. Barratt-Boyes, M.B., Ch.M., F.R.A.C.S.*, A.R. Kerr, M.B., Ch.B., F.R.A.C.S., R.M.L. Whitlock, M.B., Ch.B., F.R.A.C.P.

From The Cardiothoracic Surgical Unit, Green Lane Hospital, Auckland, New Zealand

Accepted for publication December 18, 1981.

* Address reprint requests to Sir Brian Barratt-Boyes, Cardiothoracic Surgical Unit, Green Lane Hospital, Auckland 3, New Zealand

A retrospective review has been made of 234 patients who received 239 Braunwald-Cutter valves (109 aortic, 130 mitral). For the aortic valve, the thromboembolic rate was very high (10.3 per 100 patient-years). This was associated with severe strut cloth wear in 94.5% of valves and with long strands of fibrin attached to the worn cloth in 58% of valves studied at reoperation or postmortem examination. The aortic poppet showed a mean decrease in volume of 4%, and poppet escape was recognized in 4 patients. The actuarial incidence of poppet escape was less than that predicted in earlier reports. There was a 4% incidence of stenosis of the valve. The hospital mortality associated with removal of the aortic Braunwald-Cutter valve and replacement with another device was 4%.

Performance of the mitral Braunwald-Cutter valve appears satisfactory to date (mean follow-up, 42 months). Its elective removal is not recommended.




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