echocardiography: systolic mean flow gradient of prosthetic aortic valve at end of expiration
echocardiography: systolic mean flow gradient of prosthetic aortic valve at end of expiration
echocardiography: systolic mean flow gradient of prosthetic aortic valve at end of expiration
echocardiography: systolic mean flow gradient of prosthetic aortic valve at end of expiration