Background:Diabetes and smoking are common factors found to increase platelet reactivity in patients undergoing primary PCI. Objective: Compare the individualized and combined effects of smoking and diabetes on the antiplatelet activity in patients undergoing primary PCI. Methods: sixty patients were recruited in this study. Patients were allocated to one of four groups according to the diabetes and smoking status. Non smokers- non diabetic patients, smokers non diabetic patients, non smokers diabetic patients, and smokers diabetic patients, 15 patients in each group. All patients received 180 mg ticagrelor before PCI. Platelet reactivity index(PRI) and maximum platelet aggregation were measured 24 hours after ticagrelor loading dose for each patient as indicators for antiplatelet efficacy. PRI and/or MPA values > 50% were defined as high platelet reactivity.

Inclusion Criteria:

Acute coronary syndrome (ACS) undergoing PCI

Exclusion Criteria:

Patients who had a history of severe bleeding, serious bleeding tendency, history of intracranial hemorrhage, signs of active bleeding, thrombocytopenia, uncontrolled hypertension, hypersensitivity to the used drugs (clopidogrel or ticagrelor), concomitant use of strong CYP inducers or inhibitors, and/or severe liver disorders were excluded from the study.

Patients with previous history of coronary artery disease, previous PCI or patients administering other antiplatelets were excluded from the current study.

patients with ACS undergoing PCI