Figure 13.

 (A) Three dimensional VR image showing a large RCA aneurysm (arrow). The RCA then continues as a dilated tortuous vessel. Two RCA branches are clearly shown passing down on to the RV (arrowheads); these were not visible on conventional angiography. (B) The aneurysm has formed secondary to an RCA fistula draining into the coronary sinus and then the RA. Its tortuous, dilated course can also be fully delineated by three dimensional vessel tracking techniques. Note the normal left circulation.