What are aneurysmal subarachnoid hemorrhages (SAH)?

Updated: Dec 06, 2018
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Helmi L Lutsep, MD  more...
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Aneurysmal SAH is a catastrophic condition, affecting 30,000 individuals in the United States every year. Most of these individuals (60%) either die or suffer permanent disability; 50% of survivors with favorable outcomes experience considerable neuropsychological dysfunction. Cerebral vasospasm (ie, narrowing of proximal arterial segments) complicates 20-50% of cases and is the major cause of death and disability associated with aneurysmal SAH.

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