Stroke: Causes, symptoms and prevention
What is a stroke?
A stroke is a life-threatening medical emergency that happens when the blood supply to part of the brain is cut off.
The blood supply may be cut off by a blood clot or from a burst blood vessel.
A person having a stroke may lose control over their movement, perception and speech. They may also lose consciousness.
Prompt hospital treatment is essential for stroke survival.
Clots near the brain
Over 80% of all strokes are due to blockage of the oxygen-rich blood flowing to the brain. Called ischaemic strokes, they are triggered by either a thrombus, which is a stationary clot that forms in a blood vessel, or an embolus, a clot that travels through the bloodstream and becomes lodged in a vessel.