Doppler echocardiography: prosthetic aortic valve area by velocity index at end of expiration
doppler echocardiography: prosthetic aortic valve area by velocity index at end of expiration
Doppler echocardiography: prosthetic aortic valve area by velocity index at end of expiration
doppler echocardiography: prosthetic aortic valve area by velocity index at end of expiration