3. Subject must have a single intracranial aneurysm ruptured within 30 days requiring treatment according to a multidisciplinary decision Definition: For the purposes of this study a ruptured IA patient is defined as a patient with computed tomography (CT), magnetic resonance imaging (MRI), or lumbar puncture (LP) evidence of subarachnoid hemorrhage attributed to the index aneurysm within the last 30 days.