Aortic valve replacement in the elderly: Bioprosthesis or mechanical valve?

Background. With increased life expectancy, valve operations are more and more common in elderly patients. The choice of valve substitute-mechanical valve or bioprosthesis-remains debated. Methods. Two groups of patients of the same age (69, 70, and 71 years) with isolated aortic valve replacement (mechanical 240, bioprostheses 289) were compared for mortality, morbidity, and valve-related complications. Results. No significant difference was found in survival, valve-related mortality, valve endocarditis, and thromboembolism. Mechanical valve had more bleeding events; bioprostheses had more structural deterioration, reoperation, and valve-related morbidity and mortality. Conclusions. To avoid reoperations in octogenarians, the 10-year durability of current bioprostheses should be matched with the life expectancy of the particular patient. Bioprostheses should be used after 74 years in men and 78 years in women. (C) 1998 by The Society of Thoracic Surgeons.