Neuroform Atlas Stent System Study

Inclusion Criteria

• Subject is between 18 and 80 years of age
• Documented wide neck (neck ≥ 4 mm or a dome-to-neck ratio of 3.0 without oral anticoagulation therapy
• A known absolute contraindication to angiography
• Evidence of active cancer, terminal illness or any condition which, in the opinion of the treating physician, would/could prevent subject from completing the study (e.g., a high risk of embolic stroke, atrial fibrillation, co-morbidities, psychiatric disorders, substance abuse, major surgery ≤ 30 days pre-procedure, etc.)
• Known absolute contraindication to the use of required study medications or agents (e.g., heparin, aspirin, clopidogrel, and radiographic contrast agents, etc.)
• Female subject who is pregnant or intends to become pregnant during the study
• Moya-Moya disease, arteriovenous malformation(s), arteriovenous fistula(e), intracranial tumor(s), or intracranial hematoma(s) (unrelated to target aneurysm)
• Significant atherosclerotic stenosis, significant vessel tortuosity, vasospasm refractory to medication, unfavorable aneurysm morphology or vessel anatomy, or some other condition(s) that, in the opinion of the treating physician, would/could prevent or interfere with access to the target aneurysm and/or successful deployment of the Neuroform Atlas™ Stent
• Previous treatment (e.g., surgery, stenting) in the parent artery that, in the opinion of the treating physician, would/could prevent or interfere with successful use of the Neuroform Atlas™ Stent System and/or successful adjunctive deployment of embolic coils
• Previous stent-assisted coiling of the target aneurysm