(a)
(b)
Figure 1: ECG and echocardiography at admission. (a) Twelve-lead ECG during admission shows sinus rhythm and premature atrial contractions in combination with diffuse ST-elevation, typical for acute pericarditis. (b) Ultrasound studies indicated moderate (<20 mm) pericardial effusion, here shown on the subcostal view and indicated with the white marker.