Inclusion Criteria:  Age > 18 years Diagnosis of ischemic stroke Decision of intravenous thrombolysis and/or endovascular thrombectomy by the neurologist and/or interventional neuroradiologist. Patient admitted to the emergency department during the hours and days when the hematology-biology laboratory is open (Monday to Friday from 8:30 a.m. to 6:30 p.m.) No opposition to the research from the patient or his relatives Inclusions according to the emergency procedure  Exclusion Criteria:  Age < 18 ans Formal contraindication to thrombolysis and/or endovascular thrombectomy, disorders of hemostasis and anticoagulant treatment.