Editing Vasospasm (section)

{{short description|Blood vessels narrowing due to arterial spasm}}
{{More medical citations needed|date=September 2021}}
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'''Vasospasm''' refers to a condition in which an [[arterial]] [[spasm]] leads to [[vasoconstriction]]. This can lead to tissue [[ischemia]] (insufficient blood flow) and tissue death ([[necrosis]]). 

Along with physical resistance, vasospasm is a main cause of ischemia. Like physical resistance, vasospasms can occur due to [[atherosclerosis]]. Vasospasm is the major cause of [[Prinzmetal's angina]].

Cerebral vasospasm may arise in the context of [[subarachnoid hemorrhage]] as symptomatic vasospasm (or delayed [[cerebral ischemia]]), where it is a major contributor to post-operative stroke and mortality. Vasospasm typically appears 4 to 10 days after subarachnoid hemorrhage, however the relationship between radiological arterial spasm (seen on angiography) and clinical neurological deterioration is nuanced and uncertain. <ref>{{Cite journal |last=Whittle |first=Caed |last2=Hollingworth |first2=Milo A. |last3=Dulhanty |first3=Louise |last4=Patel |first4=Hiren C. |date=2023-12-01 |title=What are the predictors of delayed cerebral ischaemia (DCI) after aneurysmal subarachnoid haemorrhage? An up-to-date systematic review |url=https://link.springer.com/article/10.1007/s00701-023-05864-4 |journal=Acta Neurochirurgica |language=en |volume=165 |issue=12 |pages=3643–3650 |doi=10.1007/s00701-023-05864-4 |issn=0942-0940|url-access=subscription }}</ref>