Quantitative tissue velocity imaging on left ventricular asynchrony in patients with congestive heart failure / 中华超声影像学杂志

ABSTRACT

Objective To evaluate the asynchrony of the different segments of left ventricle(LV) and its relation with LV function, QRS duration in the patients with congestive heart failure(CHF) by quantitative tissue velocity imaging(QTVI). Methods Forty normal controls and 40 patients with CHF were studied by QTVI. The regional velocity profiles of 18 segments of LV along LV apical long axis view, apical two chamber view and four chamber view were obtained. The time from onset of QRS complexes to peak velocity during systole and early diastole (T S and T E) were measured. The maximal difference in T S and T E within the same wall (Intra ?T S and Intra ?T E), the same segment (Inter ?T S and Inter ?T E ) and all 18 segments(Max ?T S and Max ?T E ) of LV were calculated. The parameters of LV function calculated included the mean of mitral annulus systolic peak velocities and early diastolic peak velocities of six wall(Mean Vs and Mean Ve), and ejection fraction of LV(LVEF). Results Inter ?T S,Inter ?T E,Intra ?T S,Intra ?T E,Max ?T S and Max ?T E in CHF group were significantly prolonged, all showing statistic significance when compared with control group(all P