Figure 2: Patient with Chronic Total Occlusion in proximal LAD
This CTO is located immediately after the bifurcation of the diagonal, and though it is unclear how long it has been occluded, the patient’s medical history suggests that it may be a number of years. CAG does not clearly identify the CTO ostium, (white arrows show an area that looks like the entry but black arrows show an actual dimple). It is only by the AP cranial view that the dimple be seen at all, and that only when viewed by frame by frame slow motion. This could easily be missed under normal CAG.