Superior Vena Cava Doppler Flow Changes in Rabbits With Acute Thromboembolic Pulmonary Hypertension
The purpose of this study was to explore the superior vena cava (SVC) Doppler flow changes in rabbits with acute thromboembolic pulmonary hypertension (ATEPAH) and its value in evaluating pulmonary pressure. Methods.The systolic peak flow velocity (SPV), ventricular reverse peak flow velocity (VrPV), diastolic peak flow velocity (DPV), and atrial reverse peak flow velocity (ArPV) of the SVC were measured on end expiration with pulsed wave Doppler echocardiography in 30 rabbits with different degrees of ATEPAH. Linear regression and the Bland-Altman method were used to analyze the correlation of Doppler flow velocities of the SVC to the catheter-measured pulmonary arterial systolic pressure (PASP).