The Car study is being done to collect real-world evidence of how commercially available MicroVention intracranial aneurysm treatment devices function and look at safety outcomes over a year when used per standard of care. The treating physician will use the device they think is most appropriate for each patient. The study will also be used to develop a full database in an effort to inform future studies and further the understanding of the safety and performance of these devices across a wide range of patient populations and disease characteristics.

Select Late will be looking at treatment outcomes in patients presenting with severe blood clot blocking a blood vessel in your brain (ischemic stroke) specifically in one of the large arteries in the brain effecting the front of the brain presenting between 24 and 72 hours after stroke start. The study will be looking at patient outcomes when treated with the standard of care medical management compared to medical management plus endovascular thrombectomy (a surgical procedure to remove a blood clot).