Assessment Of Left Ventricular Twist And Strain In Patients With Dilated Cardiomyopathy By Speckle Tracking Imaging

ObjectiveTwo-dimensional speckle tracking (2D-STI) in patients with dilated cardiomyopathy myocardial (DCM) peak longitudinal strain(PLS), peak radial strain(PRS), peak circumferential strain (PCS) and left ventricular short axis mitral valve level, papillary muscle level and apical short-axis horizontal rotation angle and the short axis left ventricular torsion angle characteristics and laws for the clinical evaluation of patients with dilated cardiomyopathy and evaluation of the therapeutic effect providing sports valuable reference.MethodsApplied GE vivid E9ultrasound diagnostic with M5S probe (frequency1.8～3.6MHz), in27patients with DCM and30cases in the control group of healthy volunteers using STI technology echocardiography. Each patient were collected for three consecutive cardiac cycles apical four-chamber view, apical two-chamber view, left ventricular and left ventricular long axis view of the mitral annulus, papillary muscles, the apex short axis view of the two-dimensional gray-scale levels of dynamic images, GE Echo PAC analysis software application for image analysis section above, the peak longitudinal strain were calculated for each segment myocardial systolic circumferential and radial peak strain peak strain, rotation angle of each segment and the left ventricular myocardium and overall torsional angle the strain generating segment, rotation angle, left ventricular twist angle curve.ResultPeak longitudinal strain in patients with dilated cardiomyopathy myocardial systolic radial peak strain, circumferential peak strain and the normal group, the difference was statistically significant (P<0.01). Dilated cardiomyopathy patients with mitral annulus short axis horizontal rotation angle, triceps short axis horizontal rotation angle, apical short-axis horizontal rotation angle normal group, the difference was statistically significant (P<0.01), and normal left ventricular torsion angle group difference was statistically significant (P<0.01).ConclusionWhen left ventricular contraction function seriously damaged, left ventricular strain and torsion in patients with DCM can be quantitatively evaluated by2D-STI, which provided valuable reference for the clinical evaluation with left ventricular systolic function in DCM patients.