What are the mortality rates for cerebral aneurysms?

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 has devastating consequences. About 10% of individuals with aneurysmal SAH die before reaching medical attention, 25% die within 24 hours, and 40-49% die within 3 months. Mortality rate has been estimated to be as high as 65%, with most deaths occurring early in the clinical course.

Early surgical treatment is associated with higher operative morbidity and mortality rates; however, overall morbidity and mortality rates are lower in patients who undergo surgery. Intraoperative aneurysmal rupture has a combined morbidity and mortality rate of 30-35%.

Aneurysmal SAH during pregnancy has a mortality rate of 35%, accounting for one of the leading causes of maternal mortality during pregnancy.

In one study of 102 pediatric patients with cerebral aneurysm followed for a mean of 26.8 years, researchers found long-term excess mortality after successful treatment of ruptured aneurysms, especially among males; this excess mortality was largely aneurysm-related. [3]

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