echocardiography: peak systolic velocity of distal right pulmonary veins at end of expiration
echocardiography: peak systolic velocity of distal right pulmonary veins at end of expiration
echocardiography: peak systolic velocity of distal right pulmonary veins at end of expiration (procedure)
echocardiography: peak systolic velocity of distal right pulmonary veins at end of expiration (procedure)