Pulmonary hypertension（PH）refers to the pulmonary arterial pressure exceeding a certain threshold and leading to right heart failure syndrome.Early detection and accurate assessment of right ventricular dysfunction play an important role in the patients'' diagnosis, treatment and prognosis. Although catheter manometry is the gold standard, echocardiography is a noninvasive means of evaluating pulmonary hypertension. New technology of echocardiography, such as Tissue Doppler imaging, Real-Time Three Dimensional echocardiography and Speckle Tracking imaging, can be used to evaluate the structure and function of right ventricle qualitatively and quantitatively in patients with pulmonary hypertension．