Transgastric mid-papillary short-axis image obtained in a patient with intraoperative hypotension caused by cardiac tamponade. A large pericardial effusion is identified by the echolucent spaces anterior and posterior to the LV.
TEE: transesophageal echocardiography; LV: left ventricular.
Reproduced with permission from Albert T. Cheung, MD, Stanford University School of Medicine.