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What is a subarachnoid hemorrhage (or brain hemorrhage)?

April 26, 2017brain hemorrhage subarachnoid

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What is a subarachnoid hemorrhage (or brain hemorrhage)?

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Subarachnoid hemorrhage (SAH) implies the presence of blood within the subarachnoid space from some pathologic process. The common medical use of the term SAH refers to the nontraumatic types of hemorrhages, usually from rupture of a berry aneurysm orarteriovenous malformation (AVM). The scope of this article is limited to these nontraumatic hemorrhages.