Ischaemic Strokes occur when the arteries supplying blood to the brain are blocked due to a build-up of cholesterol waxy deposits, known as plaques, in the walls of the arteries. These plaques cause the narrowing of the arteries, and they can also rupture and lead to the formation of a blood clot. This can block blood flow to the brain.
Haemorrhagic Strokes occur when the arteries in the brain rupture due to high blood pressure and a Brain Aneurysm (balloon-like bulge in the wall of the artery). Bleeding occurs from the arteries within the brain itself.
There are different causes that increase the risk of a Stroke. The risk of suffering from a Stroke increases if you smoke and as you get older. Other conditions including High Blood Pressure, High Cholesterol Level and Diabetes Mellitus increase the risk of a Stroke. The risk of Stroke is also raised with some heart complications including irregular heartbeat, recent heart attacks, and previous Strokes or TIA.