In April 2020, the Japanese Circulation Society updated guidelines recommending shortened dual antiplatelet therapy (DAPT) for patients at Japanese Version of the High Bleeding Risk (J-HBR), but the impact remains unclear. We conducted a prospective multicenter registry (SAKURA PCI2 Antithrombotic Registry) starting June 2020 (n = 1136), enrolling patients who underwent percutaneous coronary intervention (PCI). Planned DAPT duration, defined as short if less than 3 months, was based on patient background post-PCI and physicians' discretion. Planned short DAPT was used in 55.2% of patients, with a similar incidence of J-HBR (68.3% vs. 66.6%, p = 0.55) and a shorter actual DAPT duration (97 vs. 229 days, p < 0.001) compared with Planned non-short DAPT. Primary endpoints, major adverse cardiovascular and cerebrovascular events (MACCE) including all-cause death, non-fatal myocardial infarction, stent thrombosis, and stroke, and Bleeding Academic Research Consortium (BARC) type 3 or 5 bleeding (BARC-3/5), occurred similarly across groups (MACCE: 6.5% vs. 7.3%, p = 0.66; BARC-3/5: 3.7% vs. 2.2%, p = 0.14). Independent predictors of MACCE included age ≥ 75, Clinical Frailty Scale ≥ 4, and hemoglobin < 11. Age ≥ 75, severe chronic kidney disease, hemoglobin < 11, and platelets < 100,000 were linked to BARC-3/5. Among BARC 3/5 patients, 41.2% experienced bleeding after switching to single antiplatelet therapy. Planned short DAPT was implemented in 55.2% of patients, showing comparable thrombotic and bleeding outcomes to non-short DAPT.
Keywords: BARC 3 or 5 bleeding; J-HBR; MACCE; Planned short DAPT.
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