echocardiography: diastolic mean flow gradient of prosthetic mitral valve at end of expiration
echocardiography: diastolic mean flow gradient of prosthetic mitral valve at end of expiration
echocardiography: diastolic mean flow gradient of prosthetic mitral valve at end of expiration (procedure)
echocardiography: diastolic mean flow gradient of prosthetic mitral valve at end of expiration (procedure)