CLINICAL AND HEMODY-NAMIC RESULTS OF MITRAL VALVE REPLACEMENT WITH THE MONOSTRUT BJöRK-SHILEY PROSTHESIS

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From Febrary 1985 through June 1990, we performed 78 mitral valve replacements using Monostrut Björk-Shiley valves in 76 cases. Early death was observed in 3 cases (3.8%) and there were 4 late deaths among the remaining patients. Actuarial survival rate at 5 years was 89.1±4.0%. There were 2 thromboembolic episodes, one case of valve thrombosis and 2 cases of periprosthetic leakage. Freedom from all valve related complications was 94.1±2.8% at 5 years. We measured the peak valve pressure gradient and effective orifice area by doppler echocardiography in 30 cases. The peak valve gradient of the 27mm valves (n=13) was 9.3mmHg and of the 29mm valves (n=17) was 7.4 mmHg. The effective orifice area of the 27mm valves (n=13) was 2.9cm2 and of the 29mm valves (n=17) was 3.3cm2. We concluded that the Monostrut Björk-Shiley prosthesis was an acceptable prosthesis for mitral valve replacement.
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