E-page Original Images: Pericardial cyst: a rare cause of recurrent palpitation episodes

A 37-year-old woman with no previous cardiovascular disease presented with palpitation. She described recurrent palpitation episodes for 6 months. Examination was unremarkable except arrhythmic pulse. Electrocardiogram revealed atrial fibrillation with high ventricular rate (140 bpm) (Fig. 1A). A chest X-ray revealed smoothly marginated opacity in the region of the right cardiophrenic angle that partially enclosing the right border of the heart (Fig. 1B).