Feasibility and clinical outcomes of rotational atherectomy for heavily-calcified side branches of complex coronary bifurcation lesions in the real-world practice of the drug-eluting stent era.

RA for SB preservation in complex and heavily-calcified bifurcation lesions was feasible with high success rate and quite favorable long-term outcomes in the drug-eluting stent (DES) era. Given the higher rates in SB perforation and acute CIN, we recommend that SB RA should be conducted by experienced operators.