title: Evaluation of left ventricular longitudinal deformation in patients with and without ST segment depression during supraventricular tachycardia.
abstract: BACKGROUND
  The cumulative effect of repeated demand ischemia on left ventricular (LV) systolic function has been previously demonstrated. We evaluated the longitudinal deformation of LV myocardial fibers at systole and diastole using two-dimensional speckle-tracking echocardiography (2DSTE) in patients with and without ST-segment depression during supraventricular tachycardia.
  
  
  METHODS
  We recruited 104 consecutive patients, who were admitted to our hospital for the ablation of atrioventricular nodal reentrant tachycardia or atrioventricular reentrant tachycardia. The patients were thereafter evaluated by transthoracic echocardiography and 2DSTE, and longitudinal systolic strain and strain rate as well as early and late diastolic strain rates were measured.
  
  
  RESULTS
  We found no statistically significant differences in longitudinal systolic strain and strain rate as well as in early and late diastolic strain rates between the two study groups.
  
  
  CONCLUSIONS
  The longitudinal deformation properties of LV muscle fibers were not different between patients with and without ST-segment depression during supraventricular tachycardia. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 45:343-349, 2017.
authors.affiliation: Cardiology Department, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, I.R. Iran.
authors.forename: Sonia
authors.initials: S
authors.lastname: Shaabani
authors.affiliation: Cardiology Department, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, I.R. Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Sadeghian
authors.affiliation: Cardiology Department, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, I.R. Iran.
authors.forename: Ali
authors.identifier: http://orcid.org/0000-0003-2927-3742
authors.initials: A
authors.lastname: Hosseinsabet
mesh_terms: D003971:Diastole; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013599:Systole; D013617:Tachycardia, Supraventricular / Q000000981:diagnostic imaging / Q000503:physiopathology*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology*
keywords: ST-segment depression; left ventricle; supraventricular tachycardia; two-dimensional speckle-tracking echocardiography