Figure 1: Bifurcation Characteristics Guiding the Interventional Approach.

The left panel summarises the elements that suggest a provisional approach, including an eccentrically distributed plaque placed opposite to the carina, a bifurcation angle ≥50–60°, a diameter of the distal side branch reference segment ≥2.5 mm and evidence of ostial SB stenosis. The right panel summarises the elements that contribute to side branch ostium stenosis after bifurcation main vessel stenting, suggesting the use of the two-stent approach..