LAUSR

Received 16 April 2016; revision accepted for publication 12 May 2016. We present a case of incidental large left circumflex artery (LCx) aneurysm and left ventricular-coronary sinus fistula in a previously healthy asymptomatic 53-year-old adult who had a routine CT of the abdomen as part of the work-up for hematuria. Coronary CT angiography revealed a large aneurysm measuring 3.8 × 3 cm in maximal axial dimension arising from the mid-LCx and situated adjacent to the left atrium in the left inferior pulmonary vein and the left atrioventricular groove (figures 1a-d). The walls of the aneurysm were partially calcified and there was some layering noncalcified plaque along the walls the aneurysm. The LCx did not exhibit obstructive disease. Direct communication from the coronary sinus to the left ventricular (LV) Large left circumflex artery aneurysm and left ventricular-coronary sinus fistula