Fig. 2.

Parasternal short axis still frames of echocardiogram from patient demonstrating small pericardial effusion (red arrows) with ventricular interdependence for diastolic filling as evidenced by a septal shift to the left during right ventricular filling (upper panel, white arrow) and septal shift to the right during left ventricular filling (lower panel, white arrow). In the setting of shock and pericardial effusion, septal bounce is pathognomonic for effusive-constrictive pericarditis with cardiac tamponade