Abstract
Subarachnoid hemorrhage (SAH) is a neurologic emergency due to bleeding into the subarachnoid space. Mortality can reach 50%. The clinical presentation is most often in the form of headache, classically defined as maximal at onset and worst of life. The most common cause is traumatic; approximately 80% of nontraumatic SAH are due to aneurysmal rupture, with the remainder from idiopathic peri-mesencephalic hemorrhage or other less common causes. Noncontrast brain computed tomography (CT) performed within 6 hours of symptom onset has sensitivity approaching 100%. Lumbar puncture may be considered after this period for definitive diagnosis if initial CT is normal.
Original language | English (US) |
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Pages (from-to) | 803-824 |
Number of pages | 22 |
Journal | Emergency Medicine Clinics of North America |
Volume | 35 |
Issue number | 4 |
DOIs | |
State | Published - Nov 2017 |
Keywords
- Angiography
- Cerebral aneurysm
- Computed tomography
- Lumbar puncture
- Rebleed
- Subarachnoid hemorrhage
- Vasospasm
- Xanthochromia
ASJC Scopus subject areas
- Emergency Medicine