Stroke is paralysis of the body due to problem with blood supply to the brain. As blood supply to the brain depends on a single arterial system, a blockage can result in paralysis of even one whole side of the body. It is caused by high blood pressure, smoking and stress. | Stroke is paralysis of the body due to problem with blood supply to the brain. As blood supply to the brain depends on a single arterial system, a blockage can result in paralysis of even one whole side of the body. It is caused by high blood pressure, smoking and stress. |