echocardiography: pulmonary valve systolic V1/V2 ratio at end of inspiration
echocardiography: pulmonary valve systolic v1/v2 ratio at end of inspiration
echocardiography: pulmonary valve systolic V1/V2 ratio at end of inspiration (procedure)
echocardiography: pulmonary valve systolic v1/v2 ratio at end of inspiration (procedure)