Inclusion Criteria:  Fisher 3 grade subarachnoid hemorrhage at presentation Secured aneurysm by clipping or coiling Is 18-75 years of age at the time of enrollment  Cerebral vasospasm:  Cerebral angiography  o Narrowing of vessel lumen > 66%  Transcranial Doppler ultrasound  Mean flow velocity > 150 cm/s or Lindegaard Index > 3 or increase > 50 cm/s within 24 hours  Intracranial CT angiography  o Narrowing of vessel lumen > 66%  Intracranial CT perfusion o Time To Drain (TTD) > 4.7 seconds Is willing and capable of providing informed consent or existence of the presumed will of the patient by a relative or a legal representative Written confirmation by a study independent physician to guarantee patient interest Is willing and capable of complying with the study related requirements, procedures, and visits No findings on spinal imaging preventing SCS lead implantation Negative pregnancy test No breast feeding  Exclusion Criteria:  Untreated ruptured aneurysm Cerebral infarction in the territory of the spastic arteries or massive disseminated infarction Signs of cerebral herniation Uncontrollable intracranial pressure Infection Coagulation disorder Is participating in another interventional trial Circulatory instability Severe congestive heart failure