Coronary artery fistulas are unusual congenital or acquired coronary artery abnormalities in which blood is shunted into a cardiac chamber, great vessel or other structure, bypassing the myocardial capillary network (Jung et al. in Cardiovasc Ultrasound 5:10, 2007). We present a young adult patient with an asymptomatic fistula from a giant aneurysmatic left anterior descending artery to the right ventricular outflow tract, first diagnosed by echocardiography examination and further confirmed by 128-slice computed tomography coronary angiography.

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