Duration of Antiplatelet Therapy After Complex Percutaneous Coronary Intervention In Patients at High Bleeding Risk: a MASTER DAPT trial sub-analysis.

AIMS

To assess the effects of 1- or ≥3-month dual antiplatelet therapy (DAPT) in high bleeding risk (HBR) patients who received biodegradable-polymer sirolimus-eluting stents for complex percutaneous coronary intervention (PCI) and/or acute coronary syndrome (ACS).

METHODS AND RESULTS

In the MASTER DAPT trial, 3383 patients underwent noncomplex (abbreviated DAPT, n = 1707; standard DAPT, n = 1676) and 1196 complex (abbreviated DAPT, n = 588; standard DAPT, n = 608) PCI. Co-primary outcomes at 335 days were net adverse clinical events (NACE; composite of all-cause death, myocardial infarction, stroke, and Bleeding Academic Research Consortium [BARC] 3 or 5 bleeding events); major adverse cardiac or cerebral events (MACCE; all-cause death, myocardial infarction, and stroke); and type 2, 3, or 5 BARC bleeding.NACE and MACCE did not differ with abbreviated versus standard DAPT among patients with complex (hazard ratio [HR]: 1.03, 95% confidence interval [CI]: 0.69-1.52, and HR: 1.24, 95% CI: 0.79-1.92, respectively) and noncomplex PCI (HR: 0.90, 95% CI: 0.71-1.15, and HR: 0.91, 95% CI: 0.69-1.21; Pinteraction = 0.60 and 0.26, respectively). BARC 2, 3 or 5 was reduced with abbreviated DAPT in patients with and without complex PCI (HR: 0.64; 95% CI: 0.42-0.98, and HR: 0.70; 95% CI: 0.55-0.89; Pinteraction = 0.72). Among the 2,816 patients with complex PCI and/or ACS, NACE and MACCE did not differ and BARC 2, 3 or 5 was lower with abbreviated DAPT.

CONCLUSION

In HBR patients free from recurrent ischemic events at 1 month, DAPT discontinuation was associated with similar NACE and MACCE and lower bleeding rates compared with standard DAPT, regardless of PCI or patient complexity.