Subarachnoid hemorrhage

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In medicine a subarachnoid hemorrhage, is an intracranial hemorrhage that is "bleeding into the intracranial or spinal subarachnoid space, most[ly] resulting from intracranial aneurysm rupture. It can occur after traumatic injuries (subarachnoid hemorrhage, traumatic). clinical features include headache; nausea; vomiting, nuchal rigidity, variable neurological deficits and reduced mental status."[1]

## Diagnosis[edit]

A subarachnoid hemorrhage should be considered in patients in the emergency room with any of the following features:[2]

* age of 40 or more years
* neck pain or stiffness
* loss of consciousness
* onset of headache with exertion
* arrival by ambulance
* vomiting
* systolic blood pressure >160 mm Hg or diastolic blood pressure >100 mm Hg

## References[edit]

1. ↑ Anonymous (2025), Subarachnoid hemorrhage (English). Medical Subject Headings. U.S. National Library of Medicine.
2. ↑ Perry JJ, Stiell IG, Sivilotti ML, Bullard MJ, Lee JS, Eisenhauer M et al. (2010). "High risk clinical characteristics for subarachnoid haemorrhage in patients with acute headache: prospective cohort study.". BMJ 341: c5204. DOI:10.1136/bmj.c5204. PMID 21030443. PMC PMC2966872. Research Blogging.