Optimal PERioperative Antiplatelet Therapy Investigation ON Abdominal Surgery After Coronary Stent Implantation

Inclusion Criteria: * Patients with a history of coronary stenting and scheduled for abdominal surgery * Patients on a single antiplatelet agent Exclusion Criteria: * Patients on dual antiplatelet therapy (DAPT) * Patients on anticoagulation therapy * Patients with a history of stent thrombosis * Patients with CHADS2 score \>= 5 * Patients at extremely high risk of bleeding and unable to continue preoperative aspirin * Patients incapable of consent, including those under 20 years of age * Other patients for whom either discontinuation or continuation of antiplatelet agents is deemed inappropriate by the attending physician