What are the characteristics of aneurysmal subarachnoid hemorrhage (SAH)?

Updated: Dec 06, 2018
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Helmi L Lutsep, MD  more...
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Specific syndromes have been associated with particular aneurysmal locations. For example, aneurysms at the anterior communicating artery, the most common site of aneurysmal SAH (34%), have the following characteristics:

  • These aneurysms are usually silent until they rupture

  • Suprachiasmatic pressure may cause altitudinal visual field deficits, abulia or akinetic mutism, amnestic syndromes, or hypothalamic dysfunction.

  • Neurologic deficits in aneurysmal rupture may reflect intraventricular hemorrhage (79%), intraparenchymal hemorrhage (63%), acute hydrocephalus (25%), or frontal lobe strokes (20%)

See Clinical Presentation for more detail.

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