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