echocardiography: systolic TVI1/TVI2 ratio of prosthetic aortic valve
echocardiography: systolic tvi1/tvi2 ratio of prosthetic aortic valve
echocardiography: systolic TVI1/TVI2 ratio of prosthetic aortic valve (procedure)
echocardiography: systolic tvi1/tvi2 ratio of prosthetic aortic valve (procedure)