Abstract
The operative results of 203 aortic prosthetic valve reoperations performed in 175 patients from 1974 through 1986 were reviewed to identify groups at greater risk. Two to 4 reoperations were performed in 23 patients. The mean interval between the first and second valve procedures was 74 ± 57 months. The most common indications for reoperation were thrombosis of mechanical prostheses (25%), degeneration of homografts (22%) and mechanical valve dysfunction (19%). Eighteen patients (9%) died. This mortality rate was significantly higher (p < 0.05) than that of primary valve procedures performed during the same period. Mortality rates were higher among patients with prosthetic valve endocarditis (6 of 26 cases, 23%) and among those who underwent operation on an emergency basis (15 of 20, 25%). No significant correlation was found between mortality rates and the age or gender of the patients and the types of prostheses used originally.
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