title: Live three-dimensional transesophageal echocardiography in mitral valve surgery.
abstract: BACKGROUND
  Live three-dimensional transesophageal echocardiography (live-3D-TEE) is a new technique, but its clinical value is unclear at present. This study aimed to investigate the feasibility, imaging quality and accuracy of live-3D-TEE for assessing mitral valve morphology to determine if live-3D-TEE has important value in mitral valve surgery.
  
  
  METHODS
  Twenty-four patients with mitral valve disease (mean age (47.1 +/- 11.6) years, mean weight (64.7 +/- 10.5) kg) underwent live-3D-TEE and two dimensional transesophageal echocardiography (2D-TEE) before and after mitral valve surgery. Sensitivity, specificity, and total consistency rates of live-3D-TEE for diagnosing ruptured chordae were calculated and compared to surgeon's findings. We also compared the diagnostic accuracy of mitral valve disease between live-3D-TEE and 2D-TEE.
  
  
  RESULTS
  Live-3D-TEE allowed visualization of the anatomic structure of the heart online and clearly identified the valvular apparatus and their defects. Sensitivity and specificity for the detection of ruptured chordae by live-3D-TEE were 87.5% and 100% respectively, and the total consistency rate was 95.8%. Additional defects not diagnosted by 2D-TEE were found in three cases (12.5%) preoperatively by live-3D-TEE. Live-3D-TEE could evaluate the function of prosthetic or native valves immediately after operation. One case was re-repaired (4.2%) using guidance by live-3D-TEE.
  
  
  CONCLUSIONS
  Live-3D-TEE enabled evaluation of mitral valve function and provided adequate valuable information before and after mitral valve surgery. We conclude that live-3D-TEE can play an important role in mitral valve surgery.
authors.affiliation: Department of Ultrasonography, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Ma
authors.forename: Zhi-an
authors.initials: ZA
authors.lastname: Li
authors.forename: Xu
authors.initials: X
authors.lastname: Meng
authors.forename: Ya
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D017548:Echocardiography, Transesophageal; D005260:Female; D006349:Heart Valve Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D008945:Mitral Valve Prolapse / Q000000981:diagnostic imaging / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000601:surgery; D012680:Sensitivity and Specificity