Tailored Versus Coventional AntiPlaTelet Strategy Intended After OPTIMIZEd Drug Eluting Stent

Objective: To assess the safety of tailored antiplatelet strategy (short DAPT followed by P2Y12 inhibitor alone) in patients who received optimized DES implantation guided by intravascular imaging (IVUS or OCT) Design: Prospective, open label, multi-center, dual arm, randomized trial Number of Subjects 3,944 subjects (1972:1972) Study Population: Patients with coronary artery disease undergoing imaging-guided PCI Study Design: * Eligible subjects will be randomized 1:1 to a) conventional DAPT strategy or b) tailored anti-platelet strategy (short DAPT followed by P2Y12 inhibitor alone) after optimized DES implantation guided by intravascular imaging. * All subjects will be clinically followed at 1, 6, and 12 months Co-primary Endpoints: 1. Clinically relevant bleeding (BARC 2, 3, or 5) at 12 months post-PCI 2. Ischemic composite adverse events of all-cause death, MI, ischemia-driven TVR, stent thrombosis at 12 months post-PCI 3. Net clinical outcome (NACE) of all-cause death, MI, ischemia-driven TVR, stent thrombosis, BARC 2,3,5 bleeding at 12 months post-PCI Statistics and Analysis: The study was designed to test the hypothesis that tailored antithrombotic strategy, as compared to the conventional DAPT, would be superior for clinically relevant bleeding, noninferior to the ischemic composite adverse events and NACE. The primary analysis would be evaluated by intention-to-treat analysis. With 3756 (each 1,878) patients, this study has \>80% power to detect noninferiority of tailored antiplatelet strategy for ischemic composite adverse event, \>85% power to detect noninferiority of tailored antiplatelet strategy for NACE, and \>85% power to detect superiority of the tailored antiplatelet arm on clinically relevant bleeding. To compensate for 5% attrition rate, 3,944 (each 1,972) patients will be randomized.