Objective Using Velocity Vector Imaging (VVI) to assess quantitatively partial and overall right ventricular function in patients of chronic pulmonary thrombogenic embolism. Methods Two-dimensional echocardiographic images from the standard apical four chamber were analyzed.Pulmonary artery systolic pressure was calculated according to tricuspid maximal regurgitant velocity in Color Doppler ultrasound. Chronic pulmonary thromboembolism patients were divided into mild, moderate and severe pulmonary hypertension group and non pulmonary hypertension group.Longitudinal systolic myocardial velocity(Vs)，displacement (D),strain(S)，and strain rate(SR) were determined at the basal，mid and apical segments of the right lateral ventricular wall and ventricular septum in patients of chronic pulmonary thrombogenic embolism,comparing with normal control group. Results Compared with normal control group, partial and overall indicators of Vs,D,S and SR were decreased in patients of chronic pulmonary thrombogenic embolism. The higher the degree of pulmonary hypertension,the lower the above indicators. Conclusion VVI is useful for assessing quantitatively the partial and overall function in patients of chronic pulmonary thrombogenic embolism.