echocardiography: 1/3 diastolic filling period of mitral valve at end of expiration
echocardiography: 1/3 diastolic filling period of mitral valve at end of expiration
echocardiography: 1/3 diastolic filling period of mitral valve at end of expiration (procedure)
echocardiography: 1/3 diastolic filling period of mitral valve at end of expiration (procedure)