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Isolated mitral valve replacement with the Björk-Shiley tilting disc prosthesis
Abstract:
Between July 1970 and June 1977, 151 patients underwent isolated mitral valve replacement with the Björk-Shiley valve. The follow-up period extended over 8 years to June 1978. Hospital mortality was 5.2% (8/151), late mortality 8.4% (12/143). Actuarial survival analysis predicts 84 (+/- 4) % of patients to be alive at 5 years and 80 (+/- 6) % at 8 years. Thirteen patients sustained 15 episodes of thromboembolic complications; actuarially 88 (+/- 4) % of patients were free from this complication at 5 years and 81 (+/- 8) % at 8 years. Other valve-related complications included paravalvular leak (7), prosthetion showed an improvement of at least one class in 84% of patients.
Insights
The Björk-Shiley valve demonstrated good long-term outcomes in 151 patients undergoing mitral valve replacement. Survival rates were high, with 80% alive at 8 years and 84% experiencing symptom improvement.
Area of Science:
- Cardiology
- Cardiac Surgery
- Biomedical Engineering
Background:
- Mitral valve replacement is a critical procedure for severe mitral valve disease.
- The Björk-Shiley mechanical valve was a widely used prosthesis during the study period.
Purpose of the Study:
- To evaluate the long-term efficacy and safety of the Björk-Shiley valve for isolated mitral valve replacement.
- To assess survival rates, thromboembolic complications, and functional outcomes in patients receiving this prosthesis.
Main Methods:
- A retrospective analysis of 151 patients who underwent isolated mitral valve replacement with the Björk-Shiley valve between July 1970 and June 1977.
- Follow-up extended to June 1978, with actuarial survival and complication rates calculated.
Main Results:
- Hospital mortality was 5.2% and late mortality was 8.4%.
- Actuarial survival was predicted at 80% at 8 years post-operation.
- Thromboembolic complications occurred in 13 patients (15 episodes); 81% were complication-free at 8 years. 84% of patients showed functional improvement.
Conclusions:
- The Björk-Shiley valve provided acceptable long-term survival and functional improvement for mitral valve replacement patients.
- Thromboembolic complications remain a significant concern requiring management.
- This study highlights the durability and clinical benefits of the Björk-Shiley prosthesis in a large cohort.