The Effect of Sympathetic Modulation on Cerebral Vasospasm Secondary to Aneurysmal Subarachnoid Hemorrhage

The electrode is placed into the epidural space using standard epidural placement techniques with paramedian approach. The initial electrode settings have been adopted from prior studies. Should any significant discomfort be elicited from the stimulation, first the amplitude will be decreased to an acceptable level. If an acceptable level of stimulation is unable to be found, the stimulation will be discontinued.

No electrode is placed.