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Strut fracture and other events after valve replacement with the 60 degree convexoconcave Björk-Shiley prosthesis






Circulation 76(3 Pt 2): Iii137-40

Strut fracture and other events after valve replacement with the 60 degree convexoconcave Björk-Shiley prosthesis

A total of 688 patients received 808 Björk-Shiley prostheses during a 5 year span. Cumulative duration of follow-up totaled 1175.4 patient-years (1368 valve-years). Linearized rates in percent per patient-year for valve-related events (95% confidence limits) were: strut fracture, 0.5 (0.00 to 1.03); infective endocarditis, 0.94 (0.39 to 1.49); thromboembolism, 2.2 (1.37 to 3.052); valve impingement, 0.3 (0.00 to 0.77); and anticoagulant-related hemorrhage, 3.1 (2.15 to 4.14). No valve thrombosis occurred. Actuarial patient survival, including in-hospital mortality, was: aortic valve replacement, 79.8 +/- 3.4%; mitral valve replacement, 71.7 +/- 4.9%; double valve replacement, 59.8 +/- 7.5%. Incremental risk factors for death were age over 65 (p = .001), preoperative infective endocarditis (p = .04), and associated procedures (p = .0002). Although this prosthesis carries a low risk of infective endocarditis and thromboembolism, concern has been raised regarding its structural integrity.


Accession: 041453691

PMID: 3621537



Related references

Strut fracture and other events following valve replacement with the 60 degree convexoconcave bjork shiley prosthesis. American Heart Association Monograph (124): II-337, 1986

Experience with outlet strut fracture of the bjork shiley convexoconcave mitral valve prosthesis. American Heart Journal 110(4): 814-818, 1985

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Sudden death due to a minor strut fracture of Björk-Shiley prosthesis 14 months after mitral valve replacement: a case report. Nihon Kyobu Geka Gakkai 32(10): 1844-1849, 1984