title: Serial doppler echocardiographic evaluation of bioprosthetic valves in the tricuspid position.
abstract: OBJECTIVE
  This study sought to evaluate bioprosthetic valve dysfunction in the tricuspid position by serial Doppler echocardiography.
  
  
  BACKGROUND
  Few reports on the long-term results of tricuspid valve replacement with bioprosthetic valves are evaluated by serial Doppler echocardiography.
  
  
  METHODS
  Between September 1979 and December 1993, 95 patients underwent tricuspid valve replacement with bioprosthetic valves at our facility. Sixty patients who underwent serial Doppler echocardiographic examination at intervals of at least 2 years after operation were included in the final analysis. These patients were followed up from 1.5 to 13.0 years (mean 5.8 +/- 2.5).
  
  
  RESULTS
  The actuarial rates of freedom from bioprosthetic valve stenosis and regurgitation at 10 years were 46% and 51%, respectively. The prevalence of bioprosthetic valve stenosis and regurgitation increased progressively in a linear manner beginning 1 or 2 years after tricuspid valve replacement. Right heart failure developed during follow-up in 20 of the 25 patients with bioprosthetic valve dysfunction.
  
  
  CONCLUSIONS
  The long-term durability of bioprosthetic valves in the tricuspid position was substantially lower in our study than that reported in previous studies. Tricuspid bioprosthetic valve dysfunction increased progressively in a linear manner beginning 1 to 2 years after tricuspid valve replacement.
authors.affiliation: Department of Internal Medicine, National Cardiovascular Center, Osaka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: S
authors.initials: S
authors.lastname: Nagata
authors.forename: F
authors.initials: F
authors.lastname: Ohmori
authors.forename: K
authors.initials: K
authors.lastname: Eishi
authors.forename: K
authors.initials: K
authors.lastname: Nakano
authors.forename: K
authors.initials: K
authors.lastname: Miyatake
mesh_terms: D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D000368:Aged; D001705:Bioprosthesis; D002648:Child; D015150:Echocardiography, Doppler; D018618:Echocardiography, Doppler, Color; D004868:Equipment Failure; D005069:Evaluation Studies as Topic; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D016896:Treatment Outcome; D014261:Tricuspid Valve / Q000000981:diagnostic imaging*