The Oslo Acute Reperfusion Stroke Study (OSCAR)

Inclusion Criteria: * Age 18 years or older * Patients with ischemic stroke and cerebral arterial occlusion treated with endovascular revascularization. * All stroke severities and vascular distributions are eligible. * Informed written consent signed by the patient, verbal consent from the patient as witnessed by a non-participating health care person or consent by the signature of the patient's family must be provided before inclusion. Patients for whom no informed consent can be obtained will not be included in the study but will be treated according to standard guidelines. Exclusion criteria: • Patient not eligible for the study or not available for follow-up assessments (e.g. non- resident).