NON-CLOTH-COVERED CAGED-BALL PROSTHESES - 2ND DECADE

  • 1 January 1978
    • journal article
    • research article
    • Vol. 76  (6) , 788-794
Abstract
The Starr-Edwards Models 6120 mitral and 1200/60 aortic valves are caged-ball prostheses with cloth-covered sewing rings and bare-metal struts. Introduced in 1965, they have been in continuous clinical use longer than any other currently available heart valve prostheses. Late results with this valve are analyzed and compared with recent series employing other current valve prostheses. Mitral 6120 prostheses (134) were inserted at the University of Oregon Health Sciences Center from 1965-1977, with 118 operative survivors followed for a mean of 5.4 yr. Twelve year survival rate (.+-. standard error) was 50 (.+-. 8)%. Twelve percent of late deaths were valve related. Eighty-eight (.+-.5)% of valves were still in place at 12 yr. The embolic rate was 5.8 (.+-. 1.0)% per patient-yr for all emboli and 2.2 (.+-. 0.6)% per patient-year for serious emboli. Two hundred forty-nine operative survivors among 282 patients undergoing aortic valve replacement during the same period of time were followed for a mean of 4.3 yr. Twelve-yr survival was 61 (.+-. 6)% and the removal-free rate was 92 (.+-. 5) percent. Six percent of late deaths were valve related. Embolic rates were 5.0 (.+-. .7) percent and 1.8 (.+-. .4) % patient-yr for all emboli and serius emboli, respectively. Structural failure, specifically ball variance, was not encountered with this prosthesis. Ninety percent of 10 yr survivors are in N.Y.H.A., Functional Class I or II. There was 1 anticoagulant-related death in 1698 patient-yr of follow-up. The current non-cloth-covered caged-ball valves provide unquestionable durability and well-documented results into their 2nd decade of use. They provide a base line for comparison with newer prostheses and offer a valid current choice for both aortic and mitral valve replacement.

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