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Ann Thorac Surg 1977;23:302-318
© 1977 The Society of Thoracic Surgeons

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Articles

The Performance of the Braunwald-Cutter Aortic Prosthetic Valve

Departments of Surgery and Biomathematics, University of Alabama School of Medicine and Medical Center, Birmingham, AL, and the Department of Surgery, Mayo Clinic, Rochester, MN.

Accepted for publication November 30, 1976.

^* Address reprint requests to Dr. Kirklin, Department of Surgery, University Station, Birmingham, AL 35294.

Four hundred seventy-five patients underwent aortic valve replacement with the Braunwald-Cutter ball-valve prosthesis at two institutions. The early (30-day) hospital mortality was 4.7% for those with isolated aortic valve replacement and 6.9% for the entire group. For the former, 5-year actuarial survival of the hospital survivors was 72 ± 5.7%; for the latter group it was 71 ± 4.4%. Eleven patients (5 since the date of follow-up inquiry) have Suffered poppet escape, 9 of whom died. The actuarial incidence of known poppet escape is 4 ± 2.6% at 47 months; when the 5 patients suffering poppet escape since the date of follow-up inquiry are included, with certain assumptions, the incidence is 3.7 ± 1.14%. The projected probability of poppet escape using all 11 patients is 12.2% at 5 years; the 70% confidence bands of projected probability of poppet escape separate from those of the risk of rereplacement at 61 months. This and other analyses indicate that in general, patients with the Braunwald-Cutter aortic prosthesis should have it replaced 4 1/2 to 5 years after its insertion.

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