Aneurysmal subarachnoid hemorrhage (aSAH) results in significant mortality and disability. Delayed Cerebral Ischemia (DCI) is the leading cause of poor outcome after aSAH among those who survive the initial hemorrhage event. Significant effort is expended to identify patients at risk of DCI, but existing tests, such as trans-cranial Doppler, suffer from relatively poor sensitivity. Tests to identify patients with DCI prospectively are of high interest.
