Evaluation of the Efficacy of Novel Biomarkers in Predicting Clopidogrel Resistance in Patients with Ischemic Stroke

Inclusion Criteria: * Age range: 18-80 years old. Within 72 hours after symptom onset (admission), the patient has started receiving "standard" antiplatelet therapy (which must include Plavix, taken alone or in combination) * Diagnosed with mild, non cardiogenic, non disabling AIS (NIHSS score ≤ 3) or high-risk TIA (ABCD2 stroke risk assessment ≥ 4) based on the patient's symptoms, signs (such as hemiplegia, hemianopia, hemiparesis, aphasia, etc.) and various routine diagnoses and tests (including but not limited to neuroimaging, such as cranial CT, MRI, Doppler, etc.) Exclusion Criteria: * 72 hours after the onset of symptoms (admission), the patient began receiving "standard" antiplatelet therapy (including polivix, taken alone or in combination) for moderate or severe AIS (NIHSS score ≥ 5) * Patients who require intravenous thrombolysis (using rt PA, urokinase, alteplase, or tiniprase, etc.) * Mechanical intervention for thrombectomy * Cardiogenic AIS (with concomitant atrial fibrillation) * Embolic stroke of unknown origin (ESUS) * Perioperative stroke * Use anticoagulant drugs (such as warfarin, rivaroxaban, dabigatran etexils, etc.) * Individuals with severe liver and kidney dysfunction * Individuals allergic to clopidogrel or aspirin * Individuals with a tendency towards bleeding (such as low platelet count or active gastric or intestinal ulcers) * Individuals with a history of easy miscarriage or who are currently pregnant * Patients with malignant tumors or life expectancy of less than 1 year