Giant Aneurysm of Right Coronary Artery Fistula Into Left Ventricle Coexisting With Noncompaction of Left Ventricular Myocardium

Coronary artery fistula (CAF) and noncompaction of the ventricular myocardium (NCVM) result from obliteration or compact failure of the intramyocardial trabecular sinusoids to form a ventricular cavity wall. The draining site of a right coronary artery (RCA) fistula may usually be the right ventricle, right atrium, or pulmonary artery. An RCA aneurysm with a fistula to the left ventricle is rare. We report a patient with an RCA aneurysm with a fistula to the left ventricle coexisting with NCVM. The patient's condition was diagnosed by echocardiography and contrast-enhanced multidetector computed tomography.