Apical 4-chamber view from a 2D echocardiogram shows a large pericardial effusion surrounding the heart. The heart has a swinging motion during the cardiac cycle, and there is slight compression of the right atrium early in diastole, suggesting early tamponade.
2D: 2-dimensional; LA: left atrium; LV: left ventricle; PE: pericardial effusion; RA: right atrium; RV: right ventricle.
Courtesy of Thomas Binder, MD. University of Vienna.