| aSAH | aneurysmal subarachnoid hemorrhage |
| DCI | delayed cerebral ischemia |
| ET | endothelin |
| ETA | endothelin A receptor |
| ETB | endothelin B receptor |
| mRS | modified Rankin Scale |
| Na–K ATPase | sodium–potassium ATPase |
| PoC | postprotocol clazosentan |
| PoF | postprotocol fasudil |
| PrC | preprotocol clazosentan |
| PrF | preprotocol fasudil |
| WFNS | World Federation of Neurosurgical Societies |