brain, spinal cord, and nerve disorders
Subarachnoid Hemorrhage (SAH)
Prognosis for SAH
About 35% of people who have a subarachnoid hemorrhage due to a ruptured aneurysm die before they reach the hospital. Another 15% die within a few weeks because the aneurysm starts bleeding again. Procedures to treat the aneurysm (placing a device using a catheter or doing surgery to open the skull) can reduce the risk that the aneurysm will bleed again. Without treatment, people who survive for 6 months have a 3% chance of another rupture each year. The outlook is better when the cause is an Brain Arteriovenous Malformations (AVMs) . Occasionally, the hemorrhage is caused by a small defect that is not detected by cerebral angiography because the defect has already sealed itself off. In such cases, the outlook is very good. Some people recover most or all mental and physical function after a subarachnoid hemorrhage. However, many people continue to have symptoms such as weakness, paralysis, loss of sensation on one side of the body, or difficulty using and understanding language, despite timely treatment. 