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The Annals of Thoracic Surgery, Vol 23, 26-31, Copyright © 1977 by The Society of Thoracic Surgeons

ARTICLES

Mitral valve replacement with the modified University of Cape Town (UCT) prosthesis: clinical and hemodynamic results

FH Ellis Jr, RW Healy and S Alexander

Mitral valve replacement with the modified University of Cape Town prosthesis was performed in 42 patients. In 35 the procedure was an isolated one, and the hospital mortality was 6%. The late survival rate was 60%, half of the late deaths being the result of thromboembolism or complications of anticoagulant therapy. The incidence of hemolysis was low, and hemodynamic results demonstrated improvement in cardiac index and lowering of pulmonary artery pressure, pulmonary artery wedge pressure, pulmonary arteriolar resistance, and transvalvular mean gradients. However, the calculated prosthetic valve orifice area was lower than the measured area. Because of complications of thromboembolism, the high incidence of late deaths, and high transvalvular gradients, this prosthetic valve is no longer used in patients requiring mitral valve replacement.