Caused by arteriosclerosis, in which fat and cholesterol accumulate within the walls of arteries. These obstructions may restrict or completely block blood flow through the artery. Tissue downstream of the blockage is deprived of blood, resulting in stroke. Emboli may consist of blood clot fragments, clumps of platelets, fibrin, cholesterol, fat, or foreign matter. Results from a rupture of an intracranial blood vessel.
Blood erupts at high pressure into the soft brain tissue or spaces surrounding the brain.
Normal brain cells may be destroyed, and the presence of blood often results in severe headache, lethargy, or coma. Stroke is the world s number one cause of adult disability and the third leading cause of death. Warning Signs of Stroke Symptoms of a stroke vary, depending on which part of the brain is affected. Numbness, weakness, or paralysis on one side of the body or face. Sudden blurred or diminished vision in one or both eyes.