Aortic dimension(AOD), main pulmonary artery (MPA)and velocity(Pv),left and right pulmonary artery(LPA,RPA) and velocity(LPv,RPv) were measured,and (LPA+RPA)/AO rate was calculated too.

• 肺动脉主干内径MPA及血流速度Pv,左、右肺动脉内径LPA、RPA及血流速度LPv、RPv,并计算LPA+RPA/AO。