Diagnostic coronary angiogram demonstrating the left circumflex artery chronic total occlusion. These RAO −27.0° and Caudal −35.4° coronary angiography images show the sternotomy wires from prior coronary artery bypass surgery, 70% distal stenosis of the left main coronary artery, minor diffuse disease of the left anterior descending artery, and an occluded proximal chronic total occlusion of the left circumflex artery.