A stroke, also called a cerebrovascular accident (CVA) or brain attack, occurs when an area of the brain is damaged following interruption to its blood supply. This results in deterioration of the mental and physical functions controlled by that particular area of the brain.
What is the cause?
There are three main causes:
thrombosis: a clot forming in the artery to the area
embolus: a small clot from elsewhere blocking the artery
haemorrhage: bleeding into the brain (unlike the others, where the artery is blocked). The risk factors for stroke are:
high blood pressure