Long-Term Outcomes of Drug-Eluting Stent Implantation After Rotational Atherectomy for Left Main Coronary Artery Bifurcation Lesions.

Abstract

The clinical outcomes of drug-eluting stent (DES) implantation after rotational atherectomy (RA) for complex left main coronary artery (LMCA) bifurcation lesions remain unclear. Among 1,809 patients retrospectively enrolled in the Assessing Optimal percutaneous coronary Intervention for LMCA Registry, we identified 1,199 patients with LMCA bifurcation lesions treated by crossover stenting with DES for the main vessel. The study population was divided according to the use of RA. The patients in the RA group were further subdivided into the 2 subgroups on the basis of the stenting approach. The rates of periprocedural myocardial infarction and in-hospital death in the RA group were comparable to those in the non-RA group. The cumulative 5-year incidences of all-cause death and target lesion revascularization (TLR) were significantly higher in the RA group than those in the non-RA group. However, after adjusting confounders, the excess risks of the RA group relative to the non-RA group for all-cause death and TLR were no longer significant (hazard ratio 0.95, 95% confidence intervals 0.59 to 1.52, p = 0.83, and hazard ratio 1.46, 95% confidence intervals 0.82 to 2.60, p = 0.20, respectively). In the RA group, the cumulative 5-year incidences of all-cause death and TLR were markedly higher in the 2-stent subgroup than in the 1-stent subgroup (58.1% vs 26.0%, p = 0.001, and 43.0% vs 16.3%, p = 0.001, respectively). In conclusion, DES implantation after RA was a safe and feasible strategy in treating those patients with complex LMCA bifurcation lesions. In this strategy, the 2-stent approach was associated with markedly worse 5-year clinical outcomes than the 1-stent approach.