Vesalio NeVa VS for Symptomatic Cerebral Vasospasm Following aSAH (The VITAL Study)

Inclusion Criteria * Age ≥ 18 years. * Subarachnoid hemorrhage secondary to ruptured aneurysm. * Ruptured aneurysm secured with surgical clipping or endovascular intervention. * Digital subtraction angiography (DSA) or CT angiography at the time of aSAH clinical presentation or aSAH intervention with well-visualized intra-cerebral vessels is available for review. * Vasospasm in one or more of the following: the internal carotid artery (ICA), basilar, middle cerebral artery (MCA), anterior cerebral artery (ACA), or posterior cerebral artery (PCA) territory on transcranial Doppler (TCD), and/or CT angiography, and/or clinical signs of symptomatic vasospasm (change in level of consciousness, focal neurological deficit) confirmed by \> 50% narrowing in these territories on DSA. * Vasospasm despite maximized medical management defined as oral Nimodipine (unless contraindicated), systemic hypertension with SBP greater than 130 mmHg and euvolemia. * Target vessel pre-vasospasm diameter ≥ 2 mm and ≤ 4.0 mm. * Subject or legal representative is able and willing to give informed consent. Exclusion Criteria * The presence of an unsecured ruptured aneurysm. Note unsecured unruptured aneurysms remote to the site of treated aSAH are not an exclusionary. * Symptoms attributable to other causes (e.g., hydrocephalus, metabolic, infection). * Hunt and Hess Grade of 5 * Large infarct on CT scan defined as ASPECTS 0-5. * Intracranial hemorrhage not caused by aneurysm rupture. * History of ble…