Inclusion Criteria- Patient or patient's legally authorized representative has given Informed Consent according to Good Clinical Practices (GCP) and/or IRB and/or local or institutional policies.
- Patient has experienced an acute ischemic stroke due to large intracranial vessel occlusion (with associated symptoms) and has been or will be treated with a Covidien market-released neurothrombectomy device, as the initial device used to remove the thrombus.
- Treatment within 8 hours of stroke onset.
- Pre-Stroke Modified Rankin Scale (mRS) score ≤ 1 (immediately) prior to stroke onset.
- Pre-treatment National Institutes of Health Stroke Scale (NIHSS) ≥ 8 and ≤ 30.