A stroke, or cerebral vascular
accident (CVA), is damage to the brain caused by loss of blood supply to the brain. Strokes occur as a result of an embolism
, or hemorrhage. Specifically, an embolism is a fragment of a blood clot or other foreign particle that travels in the blood vessel
until it obstructs blood flow. A cerebral hemorrhage
results from blood leaking out of the vessels into the cranium. This blood forms a clot and begins to compress and destroy local brain tissue.
Effects of a stroke depend on which blood vessels have been affected by the accident, and whether or not it was a large or small stroke. If it occures in a large vessel, death can occure.
Some symptoms include
A patient with a large stroke will immediately have laboured breathing
Weakness to a part of the body, decreased sensation
Numbness, tingling, severe headache, slurred speech and memory impairment
Loss of coordination, difficulty in swallowing
Urinary incontinence, and lack of control of bowel movement
Paralysis on one side of the body
Inability to speak; inability to understand spoken and written language
Uncontrollable eye movement, drooling, eye lid dropping, strange behaviour