Efficacy and Safety of Low Dose Ticagrelor in Patients With Unstable Angina Pectoris After Coronary Stent Implantation

This is a prospective, single center, randomized, parallel-group trial designed to evaluate the efficacy and safety of low dose ticagrelor on a background of aspirin for patients treated with non-urgent coronary stent implantation. 2036 subjects will be enrolled. All patients will receive treatment with aspirin and a P2Y12 inhibitor for 3 months after the index procedure. At 3 months, eligible patients were then randomly assigned in a 1:1 ratio to receive a standard dose ticagrelor 90 mg bid or a lower dose ticagrelor 45 mg bid in addition to aspirin 100mg. The primary efficacy end points are the event rate of the composite of cardiovascular death, non-fatal myocardial infarction, stent thrombosis, coronary revascularization and stroke at 24 months. The primary safety end point is the incidence of PLATO major bleeding at 24 months.