Figure 6. The catheter stops in the aorta at the edge of an ostial LM stent. See main text for detailed description.

The light blue image border denotes the step commonly performed, not suspecting the previous pitfall. The red arrows and image borders denote where potential mistakes may occur (pitfalls). The violet arrows and image borders denote the corrective steps that arise from the pitfalls. dMV: distal main vessel; IVUS: intravascular ultrasound; LM: left main; OCT: optical coherence tomography; POT: proximal optimisation technique; SB/aSB: side branch/assigned side branch