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The Annals of Thoracic Surgery, Vol 58, 630-637, Copyright © 1994 by The Society of Thoracic Surgeons

ARTICLES

Four-year experience with the CarboMedics valve: the North American experience. North American team of clinical investigators for the CarboMedics prosthetic heart valve

JG Copeland 3rd and GK Sethi
University of Arizona Health Sciences Center, Tucson.

A multicenter prospective trial of the CarboMedics valve was initiated in July 1988. Twelve North American centers were included for the purpose of establishing the safety and efficacy of this new rotatable, bileaflet, pyrolytic-Carbon prosthesis. The study included 786 patients (using 891 valves) enrolled between July 1988 and August 1992. There were 447 male and 339 female patients from ages 2 to 83 years. Of the 618 primary replacement operations (including double valves), 393 were aortic and 292 were mitral valve replacements. Mean follow-up time was 16.1 months; 94.7% of patients had completed documentation up to and including one year. New York Heart Association functional class was III or IV for 84.4% of patients preoperatively, and I and II in over 96% of patients for the first three postoperative years. Survival for the entire group was 93% (622) at 1 month, 89% (504) at 1 year, 87% (213) at 2 years, and 85% (41) at 3 years. There were no significant survival differences between primary and repeat replacements or between aortic, mitral, and double-valve replacements. Primary replacement patients with concomitant procedures (n = 241) had slightly decreased survival rates compared with those who underwent isolated procedures (isolated survival rate, 92% [98]; concomitant procedure survival rate, 81% [59] at 2 years; p = 0.002). There was no valve failure. Linearized rates (events per 100 patient-years) in primary replacement patients after 30 days included the following: thrombosis, 0.39; thromboembolism, 0.92; hemolysis, 0.53; anticoagulant-related hemorrhage, 2.36; paravalvular leak, 0.92; endocarditis, 0.53; reoperation, 0.92; and explantation, 0.66.(ABSTRACT TRUNCATED AT 250 WORDS)

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