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, thrombosis
, 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
, and lack of control of bowel movement
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