echocardiography: 1/2 diastolic filling period of mitral valve at end of expiration
echocardiography: 1/2 diastolic filling period of mitral valve at end of expiration
echocardiography: 1/2 diastolic filling period of mitral valve at end of expiration (procedure)
echocardiography: 1/2 diastolic filling period of mitral valve at end of expiration (procedure)