title: Clinical performance of low-profile bioprostheses: results at 10 years.
abstract: The purpose of this retrospective study is to evaluate the long-term performance of the Liotta minimally intrusive bioprosthesis (MIB) and to identify its most important risk factors. From January 1980 to March 1982, 73 patients (30 males and 43 females; mean age 45.5 years +/- 11.7 standard deviation; range 11 to 64) underwent operation for heart valve replacement with an MIB. Fifty-two mitral valve replacements (MVR), 16 aortic valve replacements (AVR), 4 mitral and aortic valve replacements (MAVR), and 1 mitral and tricuspid valve replacement (MTVR) have been performed (78 MIBs implanted). Global operative mortality has been 8.2% (6/73): 9.6% (5/52) for MVR and 6.2% (1/16) for AVR. The 10-year follow-up reaches 519 patient-years and 581 valve-years, and is 96.5% and 93.9% complete, respectively. Actuarial freedom from any patient- or valve-related event has been calculated at one time with its hazard function and its incidence normalized per 100 patient- and/or valve-years; statistical significance of difference between curves has been assessed. In this report, overall actuarial survival at 10 years is 79.4% +/- 5.3% SEM (standard error of the mean), including operative deaths (incidence = 2.6% per patient-year). Two patients experienced periprosthetic leakage (PL) at 4 and 9 years, respectively (incidence = 0.4% per valve-year). One patient underwent reoperation because of otherwise untreatable prosthetic valve endocarditis (PVE) at 5 years (0.2% per valve-year).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Division of Cardiac Surgery, S. Camillo Hospital, Rome, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Rabitti
authors.forename: C
authors.initials: C
authors.lastname: Bassano
authors.forename: V
authors.initials: V
authors.lastname: Creazzo
authors.forename: G
authors.initials: G
authors.lastname: Bertoletti
authors.forename: F
authors.initials: F
authors.lastname: Nesi
authors.forename: M D
authors.initials: MD
authors.lastname: Pierri
authors.forename: F
authors.initials: F
authors.lastname: Giacopino
authors.forename: L C
authors.initials: LC
authors.lastname: D'Alessandro
mesh_terms: D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D001021:Aortic Valve; D001705:Bioprosthesis; D002648:Child; D004696:Endocarditis / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006085:Graft Survival; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000401:mortality*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D016459:Prosthesis-Related Infections / Q000209:etiology; D012086:Reoperation; D012189:Retrospective Studies; D015996:Survival Rate; D013923:Thromboembolism / Q000209:etiology; D013997:Time Factors; D014261:Tricuspid Valve