A stroke happens when the blood supply to the brain is interrupted. Blood, which contains oxygen and nutrients, is carried to the brain by blood vessels called arteries. If the blood supply is interrupted, brain cells die.
Types of stroke
A haemorrhagic stroke occurs when the wall of a blood vessel in the brain breaks, causing blood to leak from the vessel into the brain. Delivery of oxygen and nutrients to the brain is stopped, causing brain cells to die.
Haemorrhagic stroke is caused by various disorders affecting the blood vessels. Long-term high blood pressure is a key risk factor.