title: Echocardiographic quantification of mitral valvular response to myocardial revascularization.
abstract: OBJECTIVE
  Mild and/or moderate ischemic mitral regurgitation (IMR) may resolve after isolated coronary artery bypass grafting (CABG). It has been shown that the loss of saddle shape of the mitral valve is associated with IMR and is determined by an increase in the nonplanarity angle (NPA). The aim of this prospective, observational study was to test the hypothesis that NPA might decrease immediately after CABG alone in patients with mild to moderate IMR.
  
  
  METHODS
  This prospective, observational study was conducted in an academic, tertiary care hospital. Twenty patients underwent 2D and 3D transoesophageal echocardiography (TEE) and mitral valve assessment before and immediately after the CABG. NPA, circularity index, and other geometric variables were obtained. They were compared using paired t test. The SPSS (Version 15.0, Chicago, IL, USA) was used for statistical analysis. P <0.05 was considered significant.
  
  
  RESULTS
  The NPA was similar in the pre- and post-bypass periods (148° ± 15°, 148° ± 19°, P = 0.88). Circularity index (0.93 ± 0.13, 0.97 ± 0.11, P = 0.41) also was similar.
  
  
  CONCLUSIONS
  There was no change in the mitral valve NPA with revascularization alone in patients with mild or moderate IMR. Mitral valve does not change its planarity (NPA) with revascularization alone in patients with IMR.
authors.affiliation: Department of Anaesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
authors.forename: Sapna
authors.initials: S
authors.lastname: Govindan
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Hayward
authors.forename: Feroze
authors.initials: F
authors.lastname: Mahmood
authors.forename: Balachundhar
authors.initials: B
authors.lastname: Subramaniam
mesh_terms: D000328:Adult; D002315:Cardiopulmonary Bypass; D001026:Coronary Artery Bypass; D003331:Coronary Vessels / Q000601:surgery; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000000981:diagnostic imaging* / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging / Q000601:surgery; D009204:Myocardial Revascularization / Q000379:methods*; D010865:Pilot Projects; D011446:Prospective Studies