Abstract
This study was performed to clear the influence of combination of mechanical prostheses on mid-term results by comparing our patients. The patients were divided into three groups. Group O patients received a Omnicarbon valve in the aortic position and a Duromedics valve in the mitral position (n=27) ; Group S, dual SJM valves (n=32); and Group C, dual CarboMedics valves (n=21). The actuarial survival rate was 81±8% at 9 years in Group O, 87±8% at 6 years in Group S, and 79±10% at 4 years in Group C. The actuarial freedom from all valve-related morbidity and mortality was 58±18% at 9 years in Group O, 80±13% at 6 years in Group S, and 47±15% at 4 years in Group C. There was no stastical difference among the three groups. Group C, however, had a greater incidence of all valve-related morbidity and mortality. In conclusion, dual SJM valves and combining a Omnicarbon valve with a Duromedics valve have excellent mid-term results; additional proven durabillity is necessary in CarboMedics gruop.
