title: Early experience with a quadrileaflet stentless mitral valve.
abstract: BACKGROUND
  Presently no ideal prosthesis for mitral valve replacement exists. The quadrileaflet mitral valve (SJM-Quattro-MV; St. Jude Medical, Inc, St. Paul, MN) is a chordally supported stentless bioprosthesis. Due to its specific geometry it seems to be particularly suited for mitral valve replacement.
  
  
  METHODS
  From March 1999 to October 2000, 12 patients (ages 71+/-2 years) received the SJM-Quattro-MV. Six patients suffered from valvular stenosis and 6 patients from incompetence. Preoperatively, all patients were in New York Heart Association functional class III, with left ventricular ejection fraction amounts of 54%+/-17%.
  
  
  RESULTS
  Eleven patients received a medium size SJM-Quattro-MV and one patient received a large size SJM-Quattro-MV. Cross-clamp time was 99.8+/-4.9 minutes. Additional procedures were coronary artery bypass grafting (n = 3) and left atrial microwave ablation (n = 2). Postoperative mortality (n = 1) was procedure related. At follow-up of 11.6+/-5.4 months, all patients were well, the transvalvular pressure gradient was 5.0+/-1.4 mm Hg, and the effective orifice area 2.7+/-0.2 cm2.
  
  
  CONCLUSIONS
  Our preliminary experiences with the SJM-Quattro-MV presented good clinical results and promoted an optimistic way of thinking about the further development of these valve prostheses.
authors.affiliation: Cardiovascular Institute, University of Dresden, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Hofmann
authors.forename: R
authors.initials: R
authors.lastname: Cichon
authors.forename: M
authors.initials: M
authors.lastname: Knaut
authors.forename: U
authors.initials: U
authors.lastname: Kappert
authors.forename: S M
authors.initials: SM
authors.lastname: Tugtekin
authors.forename: W
authors.initials: W
authors.lastname: Aron
authors.forename: S
authors.initials: S
authors.lastname: Schüler
mesh_terms: D000368:Aged; D001705:Bioprosthesis; D002423:Cause of Death; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000601:surgery; D011183:Postoperative Complications / Q000401:mortality; D011474:Prosthesis Design; D011475:Prosthesis Failure; D017755:Prosthesis Fitting; D015996:Survival Rate; D016896:Treatment Outcome