Prompt treatment can reduce brain damage and the likelihood of death or disability. So the blood spills into the brain tissue or surrounding the brain. The second type of stroke happens when a blood vessel can leak or burst. In the first, a blocked artery can cut off blood to an area of the brain. They affect about 800,000 people in the United States each year. You've likely heard the term stroke before. Whether you're looking for answers for yourself or someone you love, we're here to give you the best information available. What is it, who it happens to, the symptoms, diagnosis, and treatment. In this video, we'll cover the basics of a stroke. Robert Brown, neurologist at Mayo Clinic.