Thirteen years evaluation of the Bjork-Shiley isolated mitral valve prosthesis. The Wessex experience.
Between 1973 and 1985, 349 patients had isolated mitral valve replacement by a Bjork-Shiley prosthesis with an overall early (30 day) mortality of 5.1%. Of the 331 survivors, 294 patients have been traced and their clinical outcome was followed for up to 13 years in order to define the long term performance of the mitral Bjork-Shiley models MBRP-standard, MBRC-convexo concave and MMSM-monostrut. Cumulative follow-up extends to 6620 patient years (mean 5.75 years). The MBRP valve was implanted in 236 patients, the MBRC valve used in 44 patients and the MMSM valve inserted in 14 patients. The late mortality and morbidity was 0.8% and 0.6% per patient year at 13 years respectively. Actuarial survival rate for the whole group excluding operative deaths was 85% at 5 years, 66% at 10 years and 58.5% at 13 years. The freedom from all valve related complications at 13 years was 70.75%. Bjork-Shiley models MBRP, MBRC and MMSM mitral valve prosthesis show excellent durability with only one case of mechanical failure over a 13 year period.
Fessatidis
I T
IT
Wessex Cardiothoracic Centre, Southampton General Hospital, England.
Vassiliadis
K E
KE
Monro
J L
JL
Ross
J K
JK
Shore
D F
DF
Drury
P J
PJ
D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004739:England / Q000453:epidemiology; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000401:mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D013923:Thromboembolism / Q000453:epidemiology / Q000209:etiology