Figure 2 Coronary computed tomography angiography (CTA) was performed to delineate the underlying cause of cardiac arrest. The imaging finding suggests that the origin of the right coronary artery is at the top of the sinus. In the CTA, anomaly of origin of the right coronary artery was observed, in which the right coronary artery origin was above the intersinus ridge. The right coronary artery traveled between the aortic root and the right ventricular outflow tract. During strenuous exercise, the patient’s right ventricular outflow tract would thicken, compressing the right coronary artery origin, leading to myocardial ischemia and cardiac arrest.