Right-to-Left Shunt Across a Patent Foramen Ovale Caused by Cardiac Tamponade: Diagnosis by Transesophageal Echocardiography RANDALL C. THOMPSON, M.D. Mayo Clinic Proceedings Volume 66, Issue 4, Pages 391-394 (April 1991) DOI: 10.1016/S0025-6196(12)60663-6 Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions
Fig. 1 Transesophageal echocardiograms in 71-year-old woman with profound hypoxemia. A, Diastolic frame, showing severe compression of left atrium (LA) and left ventricle (LV) by a large, loculated, posterior pericardial effusion. AV = aortic valve; PE = pericardial effusion. B, Localized view of atria. Atrial septum (arrow) is bulging far into left atrium. RA = right atrium. C, After injection of agitated bacteriostatic saline into a central venous line, right atrium is filled by a cloud of microbubbles. Arrow = stream of microbubbles crossing fossa ovalis membrane and entering left atrium. Mayo Clinic Proceedings 1991 66, 391-394DOI: (10.1016/S0025-6196(12)60663-6) Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions