A Study of left ventricular regional systolic function in myocardial infraction patients with quantitative tissue velocity imaging

Objective To quantitatively assess regional left ventricular systolic function in physiological and pathological(myocardial ischemia) condition by quantitative tissue velocity imaging(QTVI ) technique. Materials 20 patients with Myocardial infraction and other 20 age matched healthy subjects as control group were included.The views were obtained at LV long axis views, Myocardial velocity profiles were taken at the annulus, basal, middle and apical levels view, which could show every segments of LV walls. Peak systolic velocity (VS), and its persist time; isovolumic contraction time were measured in each segment simultaneous. Results Compared with healthy subject, The MI patients had a significantly reduced peak systolic velocity at all sites, shorten duration,prolonged and regional isovolumic contraction times, suggest myocardial ischemic and regional LV contraction damaged by myocardial infarction. Conclusion QTVI is a new Method which can noninvasionaly and quantitatively assess LV systolic function, it has an important clinical value.