refers to a condition in which blood vessels
spasm, leading to vasoconstriction
. This can lead to tissue ischemia
and death (necrosis). Cerebral vasospasm may arise in the context of subarachnoid hemorrhage
. Symptomatic vasospasm or delayed cerebral ischemia
is a major contributor to post-operative stroke and death after aneurysmal subarachnoid hemorrhage. Vasospasm typically appears 4 to 10 days after subarachnoid hemorrhage.