[Experimental study on evaluation of pulmonary hypertension by Doppler echocardiography]

The purpose of this study was to evaluate the influence of pulmonary blood flow, pulmonary vascular resistance and myocardial contractivity on several Doppler predictors of pulmonary hypertension. Acute experimental study on 14 open-chest dogs was performed. Pulmonary artery pressure, pulmonary blood flow volume and pulmonary Doppler flow velocity spectrum were recorded under different pathophysiologic states. The results showed that pulmonary hypertension could be predicted by Doppler echocardiography. Different regression equations ought to be adopted in assessing pulmonary hypertension of different pathophysiologic types.