Poor-grade aneurysmal subarachnoid hemorrhage definition



Poor-grade aneurysmal subarachnoid hemorrhage (SAH) refers to a type of SAH in which the patient has a low level of consciousness or other severe neurological deficits, usually classified as Hunt and Hess grade IV or V 1).

or as grades 4 and 5 according to the World Federation of Neurosurgical Societies (WFNS) 2)

1)
Bösel J. What Do We Mean by Poor-Grade Aneurysmal Subarachnoid Hemorrhage and What Can We Do? Neurocrit Care. 2016 Dec;25(3):335-337. doi: 10.1007/s12028-016-0347-6. PMID: 27822740.
2)
Report of World Federation of Neurological Surgeons Committee on a Universal Subarachnoid Hemorrhage Grading Scale. J Neurosurg. 1988 Jun;68(6):985-6. doi: 10.3171/jns.1988.68.6.0985. PMID: 3131498.