Figure 2a: MSCT angiography - sagittal oblique images. The proximal RCA is dilated and continues as a fistula (*) that becomes aneurysmal (Aneu), enters the inter-atrial septum and drains into the RA. Black arrowhead points to calcium at entry of the fistula into RA. White arrows indicate RCA beyond the fistula. Ao-aorta; LA-left atrium Figure 2b: Reconstructed CT image with volume rendering technique. Shows the global anatomy of the fistula (*) arising from the RCA and draining into the RA after taking a tortuous course