Follow-Up of Patients Having Had Replacement with Björk-Shiley and Medtronic-Hall Prostheses

This study comprises patients operated at the Gazi University, Thoracic and Cardiovascular Surgery Department, between April 1987 and April 1991. 153 Björk-Shiley prosthetic valves were used in 140 patients and 168 Medtronic-Hall prosthetic valves in 130 patients. Twenty-one valves were replaced in the aortic position, 106 valves in the mitral position, and 13 patients had mitral+aortic valve replacement with the Björk-Shiley prosthesis. The mean follow-up was 40.3 months (16-54) and the mean age was 35.1 in this group. Thirty-two valves were used in the aortic position, 60 valves in the mitral position, and 38 patients had mitral+aortic valve replacement with the MedtronicHall prosthesis. The mean follow-up was 19.6 months (8-37) and the mean age was 33.5 years. No significant differences existed in the early or Iate mortality, survival rates and complication-free survival rates between patients having had replacement of the two types of presthetic valves. Hospital mortality, postoperative annual mortality and complication rate during the first month were 4.2 %, 3.9 % and 9.3 %, respectively, for the B-S group, while these were 3.8 %, 4.4 % and 6.2 %, respectively, in the M-H group.