Comparison of MLCSA, MSCSA, and neointimal CSA between the ELCA group and the non-ELCA group. The changes in the MLCSA and MSCSA before, after PCI, and at 6 months of follow-up between the ELCA and the non-ELCA group are shown (a, b). (a) The changes after and before PCI in the MLCSA, MSCSA, and neointimal CSA were similar in both groups. (b) A decreased tendency in the MLCSA (-0.89 ± 1.36 mm2 vs. -0.09 ± 1.25 mm2, p = 0.05) and a significant decrease in the MSCSA was observed between 6-month follow-up and after PCI in the ELCA group (-0.49 ± 1.48 mm2 vs. 0.28 ± 0.78 mm2, p = 0.03). The changes in the neointimal CSA showed no significant difference (0.39 ± 1.94 mm2 vs. 0.37 ± 0.98 mm2, p = 0.96). MLCSA, minimum lumen cross-sectional area; MSCSA, minimum stent cross-sectional area; ELCA, excimer laser coronary atherectomy; PCI, percutaneous coronary intervention.