echocardiography: systolic time to peak flow velocity of prosthetic pulmonary valve at rest
echocardiography: systolic time to peak flow velocity of prosthetic pulmonary valve at rest
echocardiography: systolic time to peak flow velocity of prosthetic pulmonary valve at rest (procedure)
echocardiography: systolic time to peak flow velocity of prosthetic pulmonary valve at rest (procedure)