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Ann Thorac Surg 1989;48:173-185
© 1989 The Society of Thoracic Surgeons
Vancouver General Hospital and St. Paul's Hospital, The University of British Columbia, Vancouver, British Columbia, Canada
* Address reprint requests to Dr Jamieson, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, University of British Columbia, 910 W 10th Ave, No. 3100, Vancouver, BC, Canada V5Z 4E3.
From 1975 to 1987, 1,127 elderly patients underwent 1,223 valve replacements with the Carpentier-Edwards standard or supraannular porcine bioprostheses in 1,147 operations. Of the total patient population seen during these years, 33.5% receiving a standard porcine bioprosthesis and 48.6% receiving a supraannular bioprosthesis were 65 years of age or older. Of this elderly patient population, 465 patients were between 65 and 69 years old; 618 patients, 70 and 79 years old; and 52 patients, 80 years old and older. Aortic valve replacement was performed in 635 patients, mitral valve replacement in 417 patients, tricuspid valve replacement in 2 patients, and multiple-valve replacement in 80 patients. The cumulative follow-up was 3,957 patient-years. Early mortality was 9.5%:7.3% for the 65- to 69-year-old group, 10.7% for the 70- to 79-year-old group, and 15.4% for the group 80 years old and older. Late mortality was 5.5% per patient-year: 4.2% per patient-year for the 65- to 69-year-old group, 6.3% per patient-year for the 70- to 79-year-old group, and 14.1% per patient-year for the group 80 years old and older. Valve-related causes contributed to 7 early deaths and 33 late deaths. The overall patient survival, including operative deaths, was 70.7% ± 1.6% at 5 years and 47.8% ± 3.7% at 10 and 12 years. The freedom from all valve-related complications was 52.1% ± 6.1% at 10 and 12 years. The overall rate of valve-related complications was 5.0% per patient-year (fatal complications, 1.13% per patient-year). The overall rate of thromboembolism was 2.3% per patient-year and the freedom from thromboembolism, 69.6% ± 5.2% at 10 and 12 years. The freedom from structural valve deterioration was 80.8% ± 8.1% at 10 and 12 years: 71.7% ± 11.0% at 10 and 12 years for the 65- to 69-year-old group, 97.9% ± 1.2% at 10 years for the 70- to 79-year-old group, and 100% at 12 years for the group 80 years old and older. At 10 and 12 years, the freedom from valve-related death was 83.7% ± 4.3% and the freedom from reoperation, 73.3% ± 8.6%. The freedom from valve-related death, residual morbidity from thromboembolism and anticoagulant-related hemorrhage, and reoperation was 61.7% ± 7.0% at 10 and 12 years. The clinical performance of porcine bioprostheses in the elderly patient population has been excellent. The early mortality increases in patients 70 years old or older. Structural valve deterioration is essentially nonexistent at 10 and 12 years in patients 70 years of age or older.
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