Subarachnoid hemorrhage is a type of stroke that occurs when a blood vessel ruptures. Blood quickly fills the area immediately surrounding the brain and spinal cord. This space contains the cerebrospinal fluid. The fluid cushions and bathes the brain and spinal cord.

This life-threatening condition requires emergency medical care. The hemorrhage may increase the pressure around the brain. It can interfere with the brain's ability to function.

Subarachnoid Hemorrhage
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Subarachnoid hemorrhage may be caused by:

  • Head trauma
  • Rupture of cerebral aneurysms and other blood vessel deformities
  • Bleeding disorders
  • Drug use, especially with cocaine and amphetamines
  • Brain tumors