UMEM Educational Pearls

Category: Neurology

Title: Subarachnoid Hemorrahage

Keywords: SAH, subarachnoid hemorrhage, aneurysm (PubMed Search)

Posted: 10/10/2007 by Aisha Liferidge, MD (Updated: 6/13/2024)
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  • The most common (80%) cause of non-traumatic subarachnoid hemorrhage (SAH) = ruptured saccular (berry) aneurysm.
  • Saccular aneuryms are thought to be present in up to 5% of the population.
  • There is a strong familial association with cerebral aneurysms, and prevalence is increased in people with Marfan Syndrome and Polycystic Kidney Disease.
  • Other causes of non-traumatic SAH include:  AV malformation, cavernous angioma, mycotic aneurysm, and blood dyscrasia.