title: [Evaluation of reoperation results in patients after heart valve bioprosthesis implantation failure due to degeneration].
abstract: A retrospective study was conducted on 17 patients (11 female and 6 male) who underwent re-replacement of previously implanted bioprosthesis for it's structural failure in the period from 1989 until 1997. 1 of the patients was in NYHA class II, 7 in III and 9 in IV. There were 18 mechanical prostheses and 4 bioprostheses implanted during the reoperations. On 1 patient the procedure described by Geha was performed (the leaflets of damaged valve were excised and a reversed aortic St. Jude prosthesis was implanted). In almost all cases the postoperative period was complicated. There were 2 (11%) postoperative deaths.
  
  
  CONCLUSIONS
  1. The dysfunction of bioprosthesis is most often caused by leaflet calcification and thickening. Degeneration is faster in prostheses implanted in the mitral position. 2. The outcomes of the re-replacements are similar to those of the patients in the corresponding NYHA class after first replacement but the postoperative period may be more complicated. 3. The low prevalence of reoperation affirms the suitability of the bioprosthesis for selected patients over 65 years and for aortic valve replacement.
authors.affiliation: Kliniki Kardiochirurgii Pomorskiej Akademii Medycznej w Szczecinie.
authors.forename: S
authors.initials: S
authors.lastname: Wiechowski
authors.forename: M J
authors.initials: MJ
authors.lastname: Listewnik
authors.forename: S
authors.initials: S
authors.lastname: Waligórski
authors.forename: M
authors.initials: M
authors.lastname: Brykczyński
mesh_terms: D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis; D005260:Female; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome