Stroke is a condition which occur when the supply of blood to the different parts of the brain is interrupted or severely decreased depriving the brain tissue of oxygen and essential nutrients. Within the minutes, the brain cells begins to die. A stroke is a kind of medical emergency. Basically, the stroke are of two types. Firstly, called ischemic stroke that is caused by a blood clotting that blocks or plugs a blood vessel in the brain. Secondly, called hemorrhagic stroke that is caused by a blood vessel that breaks and bleeds inside the brain. Mini-strokes generally occurs when the supply of blood to the brain is concisely interrupted.