title: The long-term follow-up of the Hancock Modified Orifice porcine bioprosthetic valve.
abstract: The Hancock Modified Orifice valve is a specially fabricated, trileaflet porcine valve, which has been in clinical use at the Brigham and Women's Hospital since 1976. Three hundred seventy-nine aortic valve replacements with this device were implanted from 1976 to 1985; 305 were isolated aortic valve replacements and 74 were in association with a mitral valve bioprosthesis. The 305 patients undergoing isolated aortic valve replacement, a Food and Drug Administration patient group, are the subject of this article. The mean valve size was 22.5 mm, with 115 21-mm valves used. The mean functional preoperative class was 3.2; 99 of 305 patients (32.5%) underwent concomitant coronary artery bypass grafting. There were six operative deaths (2%). Patients were followed from 6-14 years (mean 7.4 years), and analysis was completed in early 1991. The 10-year actuarial calculation of survival freedom from reoperation, thromboembolism, structural valve degeneration, perivalvular leak, infectious valve degeneration, and total morbidity and mortality are presented.
authors.affiliation: Division of Cardiac Surgery, Brigham and Women's Hospital, Boston, Massachusetts 02115.
authors.forename: L H
authors.initials: LH
authors.lastname: Cohn
authors.forename: G S
authors.initials: GS
authors.lastname: Couper
authors.forename: S F
authors.initials: SF
authors.lastname: Aranki
authors.forename: N M
authors.initials: NM
authors.lastname: Kinchla
authors.forename: J J
authors.initials: JJ
authors.lastname: Collins
mesh_terms: D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D000368:Aged; D001021:Aortic Valve; D001705:Bioprosthesis; 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; D015996:Survival Rate; D013997:Time Factors