title: Influence of transesophageal echocardiography on intraoperative decision making for toronto stentless prosthetic valve implantation.
abstract: OBJECTIVE
  Intraoperative transesophageal echocardiography (TEE) is commonly used during aortic valve surgery. In aortic valve replacement (AVR), this permits measurement of the aortic annulus, study of the anatomy of aortic valve components, and prediction of prosthesis valve size. After cardiopulmonary bypass (CPB), echocardiography is valuable in checking prosthesis function. In this study, we evaluated the impact of intraoperative TEE on the decision-making process of aortic Toronto stentless prosthetic valve (TSPV) implantation.
  
  
  METHODS
  Fifty-two consecutive patients undergoing elective AVR were collected prospectively. Multiplane TEE was performed before CPB to determine diameters of the aortic valve annulus and sinotubular junction. This was to evaluate the feasibility of TSPV implantation in the aortic position and to predict prosthesis size. Further TEE evaluation was carried out after CPB to assess prosthetic valve function.
  
  
  RESULTS
  TEE allowed measurement of the aortic annulus and sinotubular junction, and enabled correct prediction of prosthesis size. Ultrasonic evaluation also revealed contraindications to TSPV implantation in five patients. In one case, color-Doppler examination led to immediate successful surgical correction of prosthetic incompetence.
  
  
  CONCLUSIONS
  Intraoperative multiplane TEE examination is useful in the decision-making process in AVR with the TSPV by selecting patients suitable for the stentless valve, predicting prosthesis size, and checking prosthesis function.
authors.affiliation: Department of Cardiac Anesthesia and Intensive Care Unit, Cardiac Surgery, Umberto I Hospital, Venice-Mestre, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Guarracino
authors.forename: C
authors.initials: C
authors.lastname: Zussa
authors.forename: E
authors.initials: E
authors.lastname: Polesel
authors.forename: F
authors.initials: F
authors.lastname: Rigo
authors.forename: D
authors.initials: D
authors.lastname: Penzo
authors.forename: D
authors.initials: D
authors.lastname: De Cosmo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D001705:Bioprosthesis; D001026:Coronary Artery Bypass; D018618:Echocardiography, Doppler, Color; D017548:Echocardiography, Transesophageal; D005260:Female; D006349:Heart Valve Diseases / Q000000981:diagnostic imaging / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D007431:Intraoperative Complications / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery; D016343:Monitoring, Intraoperative; D017755:Prosthesis Fitting; D012086:Reoperation; D014261:Tricuspid Valve / Q000000981:diagnostic imaging / Q000601:surgery