Safety, Feasibility, and Efficacy of Non-invasive Vagus Nerve Stimulation (nVNS) in the Treatment of Aneurysmal Subarachnoid Hemorrhage

Participants will receive two 2-minute non-invasive stimulations to the cervical branch of the vagus nerve (nVNS) three times daily with gammaCore, an FDA cleared device for the acute treatment and prevention of migraine and cluster headache. Intervention will begin within 72 hours post-rupture and end at 10 days post-rupture or discharge, whichever occurs first. The dosing regimen is supported by preclinical models and clinical data.