PMID:17484988

Citation	Hui, L, Pemberton, J, Hickey, E, Li, XK, Lysyansky, P, Ashraf, M, Niemann, PS and Sahn, DJ (2007) The contribution of left ventricular muscle bands to left ventricular rotation: assessment by a 2-dimensional speckle tracking method. J Am Soc Echocardiogr 20:486-91
Abstract	Torsion is an essential component of left ventricular (LV) function. Systolic rotation, as a component of torsion, winds the heart muscle up like a spring, setting up recoil for early diastole. We used a new 2-dimensional speckle tracking strain method to study differences in twisting in subendocardial and subepicardial layers of the LV in open-chest pigs. Our aim was to identify the relative contributions of the inner or outer layers of the LV wall to rotation and, hence, systole.
Links	PubMed PMC1978201 Online version:10.1016/j.echo.2006.10.012
Keywords	Animals; Disease Models, Animal; Echocardiography/methods; Heart Diseases/physiopathology; Heart Diseases/ultrasonography; Heart Septum/ultrasonography; Heart Ventricles/physiopathology; Heart Ventricles/ultrasonography; Myocardial Contraction/physiology; Swine; Systole; Torsion Abnormality/physiopathology; Torsion Abnormality/ultrasonography; Ventricular Function, Left/physiology
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