title: Long-term experience with the Sorin Bicarbon and Edwards Mira mechanical valve prostheses in the mitral position.
abstract: OBJECTIVE
  Sorin Bicarbon (SB) and Edwards Mira (EM) valves have an identical mechanical design but different sewing cuffs. The purpose of this retrospective study was to analyze the long-term clinical and echocardiographic outcomes after mitral valve replacement with these two valves in a combined population of patients.
  
  
  METHODS
  We retrospectively reviewed records of 73 patients who underwent mitral valve replacement using SB (n = 19) or EM (n = 54) valves. Preoperatively, 49 patients (68.1%) were in New York Heart Association (NYHA) functional class III or IV. Concomitant procedures were performed in 52 patients (71.2%). Early and late postoperative echocardiography was performed in 69 and 57 patients, respectively.
  
  
  RESULTS
  Operative mortality was 4.1%, and early morbidity was 9.6%. Overall patient survival at 9 years was 85.1% +/- 4.8%. Actuarial freedom from valve-related death was 95.4% +/- 2.6% at 9 years. As shown by Doppler echocardiography, the early and late mean transprosthetic pressure gradients were 3.4 +/- 1.4 mmHg and 3.8 +/- 2.1 mmHg, respectively. At the end of follow-up, 98.4% of survivors were in NYHA class I or II.
  
  
  CONCLUSIONS
  The Sorin Bicarbon and, Edwards Mira mechanical valves in the mitral position provide satisfactory long-term clinical and echocardiographic performance.
authors: Department of Cardiovascular Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, Japan. tm-fukui@gem.hi-ho.ne.jp
authors: Toshihiro
authors: T
authors: Fukui
authors: Toshihiko
authors: T
authors: Shibata
authors: Yasuyuki
authors: Y
authors: Sasaki
authors: Hidekazu
authors: H
authors: Hirai
authors: Manabu
authors: M
authors: Motoki
authors: Yosuke
authors: Y
authors: Takahashi
authors: Shigefumi
authors: S
authors: Suehiro
mesh_terms: D000368:Aged; D015150:Echocardiography, Doppler; D005260:Female; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000601:surgery; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D011474:Prosthesis Design; D012107:Research Design; D012189:Retrospective Studies; D013318:Stroke Volume; D016019:Survival Analysis; D013997:Time Factors; D016896:Treatment Outcome