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[Study of the late results of reimplantation of heart valve prostheses based on 15-year experience].

Authors studied two groups of patients, in which a cardiac valvular prosthesis was reimplanted within 15 years. Data of patients reoperated on (group A) were used to estimate indications, surgical methods, postoperative course and late results. Data of patients which underwent surgery and then requiring reoperation (group B) were used to evaluate the percentage of reoperation falling to 1 patient/1 year according to a primary implanted valvular prosthesis: 42 patients were divided into two groups. 3 perioperative and 12 late deaths (totally 28.3%) were stated in the group A. 5- and 10-year survival rates were 83.3% and 65.6%, respectively. In the group B the lowest percentage of reoperation (1 patient/1 year) were stated in patients with mitral Starr-Edwards 6120 valve (029) and Björk-Shiley aortic valve (0.13). The highest percentage of reoperation was observed in patients with biological prosthetic valves (homograft or heterograft--4.64) and in comparison with patients with primary implanted mechanical prostheses (0.24). Those differences were statistically significant (p less than 0.001).