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CARDIAC VALVE REPLACEMENT (1963–;1979)
Author(s) -
Windsor Harry M.,
Shanahan Mark X.,
Chang Victor P.
Publication year - 1979
Publication title -
medical journal of australia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 131
eISSN - 1326-5377
pISSN - 0025-729X
DOI - 10.5694/j.1326-5377.1979.tb112701.x
Subject(s) - medicine , ball valve , mitral valve replacement , mechanical valve , surgery , survival rate , cardiac valve , valve replacement , prosthesis , mitral valve , cardiology , structural engineering , stenosis , engineering
A 15‐year experience (from 1963 to 1978) in cardiac valve replacements with mechanical prosthetic valves (caged ball or tilting disc types) and with bioprostheses (porcine xenografts) is reported. The actuarial survival rates for patients who received the caged ball type prostheses (Starr‐Edwards) were 42% and 36% respectively for mitral valve‐replacements at 12 and 14 years. The actuarial survival rate for patients who received the tilting disc type prostheses (Björk‐Shiley type and later the Lillehei‐Kaster type) was 74% at six to seven years. The actuarial survival rate for patients who had aortic valve replacement with a caged ball valve was 43% at 14 years, and for those who had a tilting disc valve it was 80% at six to seven years. Multiple valve replacements were carried out with combinations of prostheses. The actuarial survival rate for patients was 65% for triple valves, and 57% for double valves at 13 years. Bioprostheses are now our first choice as cardiac valve‐replacements. In 121 implants performed since 1977, there have been two operative deaths, but no late deaths. Bioprostheses, although less thrombogenic than mechanical valve prostheses, are less durable and some risk of thromboembolism remains.