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A stroke, or brain attack, occurs when a blood clot blocks an artery, or when a blood vessel breaks, interrupting blood flow to an area of the brain. When either of these things happen, blood flow and oxygen to the brain is interrupted, causing brain cells to die.  This causes brain damage.

When brain cells die during a stroke, abilities controlled by that area of the brain will be affected, or lost.  These abilities include:
Symptoms may include:
  • sudden numbness or weakness of the face, arm, or leg - especially on one side of the body
  • sudden confusion, trouble speaking or understanding
  • sudden trouble seeing in one or both eyes
  • sudden trouble walking
  • dizziness
  • loss of balance or coordination
  • sudden severe headach with no known cause
Causes may include:
Treatment may include:
Types include:
  • ischemic - more common form of stroke that occurs when arteries are blocked by blood clots or by the gradual buildup of plaque and other fatty deposits
  • hemorrhagic stroke - occurs when a blood vessel in the brain breaks, leaking blood into the brain
  • cardiology
  • neurology
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