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Ann Thorac Surg 1977;24:131-139
© 1977 The Society of Thoracic Surgeons
Departments of Thoracic and Cardiovascular Surgery and Cardiology, The Medical College of Wisconsin, St Luke's Hospital, Milwaukee County General Hospital, and Wood Veteran's Administration Hospital, Milwaukee, WI
* Address reprint requests to Dr. Lepley, 9800 W Bluemound Rd, Milwaukee, WI 53226
This study analyzes 484 patients who survived mitral, aortic, or mitral and aortic valve replacement using the Björk-Shiley prosthesis from January, 1970, through December 31, 1974. Long-term follow-up of 1
to 6
years (mean, 3.67 yr) was done on 435 patients (98.2%).
Eighty to 85% of the patients have improved noticeably. Thromboembolic problems occurred in 6.9%, representing 1.5 emboli per 1,000 patient-months. Anticoagulant bleeding problems occurred in 6.4% of the patients; late mortality was 15%.
Actuarial survival curves showed patients at risk to 6 years having a 79% chance of survival. The same analysis according to preoperative New York Heart Association Functional Classification showed a striking reduction in survival in Class IV patients. The Björk-Shiley prosthesis is a good choice for valve replacement today. Earlier diagnosis and treatment are needed to obtain better long-term survival.
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