While the occurrence of strokes has decreased by a fair portion, they remain a dangerous threat. Patients experience a stroke when the blood supply to the brain gets interrupted. This could happen when the blood vessel reaching the brain is ruptured, or a blockage is experienced. When blood does not reach the brain, the oxygen supply also depletes. As the brain tissues do not receive oxygen and blood, they begin to die due to the lack of nourishment. A stroke can then become life-threatening. If a steady supply of oxygen and blood does not reach the brain in time, the individual may not survive.