title: Prosthetic replacement of tricuspid valve: bioprosthetic or mechanical.
abstract: BACKGROUND
  Tricuspid valve replacement is one of the most challenging operations in cardiac surgery. Selection of the suitable prosthesis is still debatable.
  
  
  METHODS
  In our institution, between January 1980 and December 2000, 129 tricuspid valve replacements were performed in 122 patients (14.7%). Bioprosthetic valves were used in 32 patients, whereas 97 patients had mechanical valve implantation. Twenty-two percent of replacements were done on men. Mean age was 35.27+/-11.56 years. In all patients, initially an annuloplasty technique was tried. Tricuspid valve replacement was performed when annuloplasty was not sufficient. In most of the cases, tricuspid valve interventions were done under cardiopulmonary bypass and on a beating heart.
  
  
  RESULTS
  Early mortality was 24.5%. Patients were followed for 2 to 228 months. Seven patients underwent reoperation because of tricuspid valve dysfunction (7.6%). Nine patients died during the follow-up period. Late mortality was 9.7%. Actuarial estimates of survival in 20 years of follow-up for all tricuspid prosthetic valves, mechanical valves, and bioprosthetic valves were 65.1%+/-9.3%, 68.3%+/-10.6%, and 54.8%+/-12.1%, respectively. For the bioprosthetic valve group, freedom from structural valve degeneration was 90%+/-5.5%; for the mechanical valve group, freedom from deterioration, endocarditis, and leakage was 97.8%+/-4.2%, and freedom from thromboembolism was 92.6%+/-6.9%.
  
  
  CONCLUSIONS
  We found that there was no statistically significant difference between the two groups in terms of early mortality, re-replacement, and midterm mortality (p > 0.05). Nevertheless, we recommend low profile modern bileaflet mechanical valves for prosthetic replacement of the tricuspid valve, due to their favorable hemodynamic characteristics and durability.
authors.affiliation: Siyami Ersek Thoracic and Cardiovascular Surgery Center, Istanbul, Turkey. mehmetkaplan@superonline.com
authors.forename: Mehmet
authors.initials: M
authors.lastname: Kaplan
authors.forename: Mustafa Sinan
authors.initials: MS
authors.lastname: Kut
authors.forename: Mahmut Murat
authors.initials: MM
authors.lastname: Demirtas
authors.forename: Serdar
authors.initials: S
authors.lastname: Cimen
authors.forename: Azmi
authors.initials: A
authors.lastname: Ozler
mesh_terms: D000293:Adolescent; D000328:Adult; D001705:Bioprosthesis; D002315:Cardiopulmonary Bypass; D005260:Female; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000209:etiology / Q000401:mortality / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology / Q000401:mortality / Q000601:surgery; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D015996:Survival Rate; D014261:Tricuspid Valve / Q000601:surgery*