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What Is a Subarachnoid Hemorrhage?

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Updated February 20, 2008

What Is a Subarachnoid Hemorrhage? ADAM
Question: What Is a Subarachnoid Hemorrhage?
Answer: Bleeding inside the brain that is caused by the rupture of a blood vessel that travels over the surface of the brain, inside the subarachnoid space. The subarachnoid space is located between two layers of meninges, which cover the brain. Typically, subarachnoid hemorrhages are the result of a ruptured aneurysm.

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