A 6 year experience with the St. Jude medical valve: hemodynamic performance, surgical results, biocompatibility and follow-up
LS Czer,
J Matloff,
A Chaux,
M DeRobertis,
A Yoganathan,
and
RJ Gray
After in vitro testing (confirmed in vivo) of three contemporary valve designs (St. Jude, Bjork-Shiley and Carpentier-Edwards) demonstrated that the St. Jude valve possessed the most favorable hydrodynamic performance characteristics, a limited clinical trial was begun in high risk patients who might benefit from a prosthesis with improved hemodynamics. Between March 1978 and March 1984, 419 St. Jude prostheses (157 aortic, 156 mitral and 53 double aortic-mitral) were implanted in 366 patients. Ninety-six percent were in New York Heart Association functional class III or IV preoperatively. Early (30 day) mortality was 10.4% overall, and was lower after aortic (5.7%) or double (7.5%) than after isolated mitral valve replacement (16.0%). Forty-four prosthetic mitral valve recipients with severe ischemic mitral regurgitation experienced a 32% early mortality rate; without this group, mitral valve replacement carried a 10% early mortality rate (p less than 0.01). Multivariate logistic regression analysis confirmed that early death was strongly associated with three preoperative patient characteristics (p less than 0.05): ischemic mitral valve disease, depressed left ventricular function (ejection fraction less than 0.55) and advanced functional class (class IV). Late follow-up (7,055 patient-months, mean 22) was 99.7% complete (1 patient lost). Actuarial survival at 4 years was 80, 80 and 79% after aortic, mitral (nonischemic) and double valve replacement, respectively; in the subset with ischemic mitral regurgitation, actuarial survival was 34% (p less than 0.01). Eighty-six percent of survivors were in functional class I or II.(ABSTRACT TRUNCATED AT 250 WORDS)
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