Cerebrovascular accident is the term that refers to any functional abnormality of the Central Nervous System that occurs when the normal blood supply to the brain is disrupted, as by a blood clot or a ruptured blood vessel, and vital brain tissue dies. Cerebrovascular accident is commonly called Strokes.
Cerebrovascular accident may be caused by any of three mechanisms.
- Cerebral Thrombosis – blockage in the thrombus (clot) that has built up on the wall of the brain artery.
- Cerebral Embolism – blockage by an embolus (usually a clot) swept into the artery in the brain.
- Hemorrhage – Rupture of a blood vessel and bleeding within or over the surface of the brain.