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Abstract
AbstractFrom 1972 through 1976, 140 patients underwent aortic valve replacement (AVR) with the Lillehei‐Kaster (LK) prosthesis and 18 additional patients had AVR plus coronary bypass procedures. Follow‐ up information was obtained in 98% of the patients. The operative mortality rate was 7.5% and the actuarial 5‐ year survival rate was, 79%. Two episodes of thromboembolism occurred in 3,645 patient‐months. Prosthesis malfunction or significant hemolysis has not occurred. Postoperative catheterization studies revealed a functional valve area of 0.81 cm2 with the 14A prosthesis; all other valve areas were greater than 1.1 cm2. Continued use of the LK aortic valve prosthesis with warfarin anticoagulation is recommended in sizes greater than 14A.
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