Abstract
An 8-year-old boy was referred to our outpatient clinic where the clinical diagnosis of aortic regurgitation was made. His physical examination revealed a severe aortic systolic-diastolic murmur. The transthoracic echocardiograms showed an abnormal tunnel-like structure arising from the right coronary sinus of Valsalva, but separate from the right coronary artery, and connecting the left ventricle. The tunnel measured 7 mm diameter and 20 mm length, the aortic end of the tunnel was 7 mm and the ventricular was 11 mm.
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