title: Effect of coronary artery bypass surgery on left ventricular function as assessed by strain and strain rate imaging.
abstract: BACKGROUND
  This study examined the effect of coronary artery revascularization on left ventricular function and the results of strain imaging for the detection of ischemia before and after coronary artery bypass graft (CABG) surgery.
  
  
  METHODS
  Sixty-eight patients with a history of coronary artery disease (CAD) were included, prospectively. Conventional echocardiography and color tissue Doppler-derived strain-strain rate echocardiographic imaging were performed 24 hours before and 3 months after CABG surgery.
  
  
  RESULTS
  While strain rate values of the basal septum, middle segment of the lateral wall, middle segment of the inferior wall, and middle and basal segments of the anterior wall were significantly increased, other segments did not change after the operation. The mean systolic strain rate value was significantly increased after the operation. Left ventricle strain values in the middle segment of the septum, middle and basal segments of the inferior wall, and middle and basal segments of the anterior wall were significantly increased after the operation. No significant difference was noted in the basal septum or the middle and basal segments of the lateral wall after the operation. The mean systolic strain value was significantly increased after the operation.
  
  
  CONCLUSIONS
  The results of this study suggest that strain and strain rate echocardiography can provide an accurate evaluation of regional contractile function after CABG, even in the segments that are apparently normal.
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Durmaz
authors.affiliation: Department of Cardiovascular Surgery, Ataturk Education and Research Hospital, Ankara, Turkey drhuseyinbayram@gmail.com.
authors.forename: H
authors.initials: H
authors.lastname: Bayram
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: Na
authors.initials: N
authors.lastname: Bayram
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Sari
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Keles
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Bastug
authors.affiliation: Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Bozkurt
mesh_terms: D000368:Aged; D001026:Coronary Artery Bypass; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D018618:Echocardiography, Doppler, Color; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D016277:Ventricular Function, Left
keywords: Doppler echocardiography; coronary artery bypass grafting; left ventricle; off-pump coronary artery bypass; ventricular function