postoperative echocardiography: systolic mean residual gradient of prosthetic pulmonary valve
postoperative echocardiography: systolic mean residual gradient of prosthetic pulmonary valve
postoperative echocardiography: systolic mean residual gradient of prosthetic pulmonary valve (procedure)
postoperative echocardiography: systolic mean residual gradient of prosthetic pulmonary valve (procedure)