Figure 7b. LCX artery. (a) Axial CT image shows the LCX artery (straight solid arrow) in the left atrioventricular groove, the RCA (open arrow) in the right atrioventricular groove, and the LAD artery (curved arrow) coursing toward the apex of the heart. (b-d) Coronal oblique volume-rendered image (b), oblique volume-rendered image of the top of the heart (c), and axial oblique volume-rendered image (d) show the LCX artery (arrow) in the left atrioventricular groove and obtuse marginal branches (arrowhead) to the lateral left ventricle.