title: Evaluation of left ventricular function using left ventricular twist and torsion parameters.
abstract: The left ventricular (LV) twist/torsion, wringing motion of the heart is a key element for regulating LV systolic and diastolic mechanics. Until recently, the evaluation of LV twist was limited to the research arena because of the requirement of invasive techniques or low availability of tagged MRI. The recent development of two-dimensional speckle tracking echocardiography enables the noninvasive measurement of LV rotation in humans. This article constitutes a practical guide for the measurement and interpretation of LV twist parameters using two-dimensional speckle tracking echocardiography and discusses its clinical usefulness for the evaluation of LV function.
authors.affiliation: Second Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan. takeuchi@med.uoeh-u.ac.jp
authors.forename: Masaaki
authors.initials: M
authors.lastname: Takeuchi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Otsuji
authors.forename: Roberto M
authors.initials: RM
authors.lastname: Lang
mesh_terms: D004452:Echocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology; D017410:Practice Guidelines as Topic; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D014102:Torsion Abnormality / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology; D016277:Ventricular Function, Left / Q000502:physiology; D020257:Ventricular Remodeling / Q000502:physiology