Blood flow velocity.S2 wave:Vel:Pt:Pulmonary vein:Qn:US.doppler.PW
blood flow velocity.s2 wave:vel:pt:pulmonary vein:qn:us.doppler.pw
Blood flow velocity.S2 wave:Vel:Pt:Pulmonary vein:Qn:US.doppler.PW
blood flow velocity.s2 wave:vel:pt:pulmonary vein:qn:us.doppler.pw