TY - JOUR
T1 - Late results of valve replacement with the Bjork-Shiley valve (1973 to 1982)
AU - Orszulak, T. A.
AU - Schaff, H. V.
AU - DeSmet, J. M.
AU - Danielson, G. K.
AU - Pluth, J. R.
AU - Puga, F. J.
PY - 1993
Y1 - 1993
N2 - Cardiac valve replacement with use of only the Bjork-Shiley prosthesis was performed in 1253 patients between January 1973 and December 1982. There were 828 patients having aortic valve replacement, 280 patients having mitral valve replacement, and 145 patients having double valve replacement with aortic and mitral valve prostheses. Patient outcome was stratified according to multiple variables, including valve position and valve model (spherical versus convexo-concave discs). No valve failure due to strut fracture was identified in 26 high-risk patients (mitral valve replacement with greater than or equal to 29 mm implanted in patients less than or equal to 50 years of age) followed up for a mean of 10 years postoperatively. Fifteen patients had late thrombosis of their Bjork-Shiley prosthesis (0.28 per 100 patient- years), but there was no significant difference in risk of valve thrombosis comparing the spherical and convexo-concave discs (0.27 per 100 patient- years versus 0.27 per 100 patient-years). One hundred two patients had 128 thromboembolic episodes; rates of thromboembolism after aortic valve replacement, mitral valve replacement, and double valve replacement were 2.1, 4.3, and 4.6 per 100 patient-years, respectively. Percentages of patients free from thromboemboli after aortic valve replacement, mitral valve replacement, and double valve replacement were 93% ± 1%, 86% ± 2%, and 89% ± 3% at 5 years postoperatively and 87% ± 2%, 79% ± 5%, and 77% ± 8% 10 years postoperatively. There was no significant difference in the rates of thromboemboli for spherical and convexo-concave discs for all patients and for each of the subgroups. Ten-year actuarial survival estimates for patients dismissed alive from the hospital after aortic valve replacement, mitral valve replacement, and double valve replacement with the Bjork-Shiley valve were 65% ± 4%, 63% ± 5%, and 55% ± 8%, respectively. Overall event-free survival (freedom from death, thromboembolism, anticoagulant-related bleeding, endocarditis, and reoperation) was similar for the three patient groups. Performance of the Bjork-Shiley valve as judged by late patient follow-up is similar to other mechanical valves, and modifications in disc design do not appear to have reduced the threat of late valve thrombosis and thromboemboli. Evidence does not support elective explanation of this prosthesis.
AB - Cardiac valve replacement with use of only the Bjork-Shiley prosthesis was performed in 1253 patients between January 1973 and December 1982. There were 828 patients having aortic valve replacement, 280 patients having mitral valve replacement, and 145 patients having double valve replacement with aortic and mitral valve prostheses. Patient outcome was stratified according to multiple variables, including valve position and valve model (spherical versus convexo-concave discs). No valve failure due to strut fracture was identified in 26 high-risk patients (mitral valve replacement with greater than or equal to 29 mm implanted in patients less than or equal to 50 years of age) followed up for a mean of 10 years postoperatively. Fifteen patients had late thrombosis of their Bjork-Shiley prosthesis (0.28 per 100 patient- years), but there was no significant difference in risk of valve thrombosis comparing the spherical and convexo-concave discs (0.27 per 100 patient- years versus 0.27 per 100 patient-years). One hundred two patients had 128 thromboembolic episodes; rates of thromboembolism after aortic valve replacement, mitral valve replacement, and double valve replacement were 2.1, 4.3, and 4.6 per 100 patient-years, respectively. Percentages of patients free from thromboemboli after aortic valve replacement, mitral valve replacement, and double valve replacement were 93% ± 1%, 86% ± 2%, and 89% ± 3% at 5 years postoperatively and 87% ± 2%, 79% ± 5%, and 77% ± 8% 10 years postoperatively. There was no significant difference in the rates of thromboemboli for spherical and convexo-concave discs for all patients and for each of the subgroups. Ten-year actuarial survival estimates for patients dismissed alive from the hospital after aortic valve replacement, mitral valve replacement, and double valve replacement with the Bjork-Shiley valve were 65% ± 4%, 63% ± 5%, and 55% ± 8%, respectively. Overall event-free survival (freedom from death, thromboembolism, anticoagulant-related bleeding, endocarditis, and reoperation) was similar for the three patient groups. Performance of the Bjork-Shiley valve as judged by late patient follow-up is similar to other mechanical valves, and modifications in disc design do not appear to have reduced the threat of late valve thrombosis and thromboemboli. Evidence does not support elective explanation of this prosthesis.
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U2 - 10.1016/s0022-5223(19)33816-4
DO - 10.1016/s0022-5223(19)33816-4
M3 - Article
C2 - 8429659
AN - SCOPUS:0027511459
SN - 0022-5223
VL - 105
SP - 302
EP - 312
JO - Journal of Thoracic and Cardiovascular Surgery
JF - Journal of Thoracic and Cardiovascular Surgery
IS - 2
ER -