Fig. 7

Diagram of LM partition. \({\rm Z}_{{{\text{ostia}} - o}}\), the outer curvature of the ostium part; \({\rm Z}_{{{\text{ostia}} - i}}\), the inner curvature of the ostium part; \({\rm Z}_{{{\text{stem}} - o}}\), the outer curvature of the stem part; \({\rm Z}_{{{\text{stem}} - i}}\), the inner curvature of the stem; \({\rm Z}_{{{\text{LAD}}}}\), the LAD side of bifurcation; \({\rm Z}_{{{\text{LCX}}}}\), the LCX side of bifurcation