Adenosine

Dosing 0.3-04. mg/kg if necessary to induce asystole in the setting of uncontrollable bleeding from aneurysm rupture

Monitoring

SSEPs, motors, and EEG

Pinning

Always use a radiolucent head holder in case of need for intraoperative angiogram. 

Positioning

Wrist for Intra-op Angiogram