(a) Large circumferential pericardial effusion measuring 2.6 centimeters posteriorly, 1.5 centimeters anteriorly, and 1.8 centimeters at the apex with right atrial collapse and without right ventricular collapse. Significant inflow variation was noted across the mitral and tricuspid valves. Left ventricular ejection fraction was estimated at 55%. Mild concentric left ventricular hypertrophy was present. (b) Echocardiogram obtained the day after pericardial drainage demonstrates resolution of the pericardial effusion.