Clinical outcomes in patients with high bleeding risk and bifurcations after percutaneous coronary intervention with resolute onyx and 1-month dual antiplatelet therapy

ABSTRACT

BACKGROUND The optimal duration of dual antiplatelet therapy (DAPT) in patients with high bleeding risk (HBR) undergoing percu taneous coronary intervention (PCI) varies based on individual clinical and lesion characteristics. It is unknown whether patients with HBR and bifurcation lesions can be safely treated with an abbreviated DAPT. In this analysis, we examined ischemic and bleeding outcomes at 1 year in patients with and without bifurcations who underwent PCI in the Onyx ONE Clear study. METHODS Patients meeting at least 1 HBR criterion undergoing PCI with Resolute Onyx zotarolimus-eluting stents (Medtronic) were enrolled. DAPT was required for the first month post-procedure and single antiplatelet therapy (SAPT) thereafter. In this analysis, 1-year outcomes were assessed in patients with and without treated index procedure bifurcation lesions as reported by the study investigators. RESULTS Of 1,506 patients in the Onyx ONE Clear study, 218 (14.5%) had treated index procedure bifurcation lesions. Among these, 89% were treated with a provisional stenting technique and 11% with a 2- stent technique. Patients with versus without bifurcation lesions had similar baseline clinical characteristics; however, procedure time was greater for patients with bifurcations (49.2 3 4.6 vs 40.6 28.7 minutes, P < 0.001), as was total stent length (45.3 32.5 vs 35.5 24.9 mm, P < 0.001). SAPT use after 1 month was 97% for patients both with and without bifurcations. The primary study endpoint of com posite cardiac death or myocardial infarction at 1 year was nonsig nificantly different but was numerically higher for patients with versus without bifurcations (9.8% vs 6.5%, P » 0.08), as were the rates of other ischemic events (Table 1). Conversely, major bleeding events (Bleeding Academic Research Consortium [BARC] 3-5) were less prevalent for patients with bifurcations, in part relating to differences in rates of oral anticoagulation between groups. CONCLUSION In the Onyx ONE Clear study, patients with HBR and bifurcations treated with Resolute Onyx zotarolimus-eluting stents and only 1-month DAPT tended to have nonsignificantly different but numerically slightly higher ischemic event rates and less major bleeding compared with patients without bifurcation lesions. Further studies are required to determine the optimal DAPT duration following PCI for HBR patients with coronary bifurcation lesions.