A stroke happens when an artery becomes blocked or ruptures. Most strokes occur when arteries are blocked by blood clots or by the gradual build-up of plaque and other fatty deposits.
Arteries can rupture when weak spots on the blood vessel wall break.
Every year, stroke strikes more than 700,000 Americans - killing 160,000 and forever changing the lives of the 540,000 who survive. The good news is that many strokes can be prevented by reducing risks, and if you do have a stroke, the brain damage may be minimized if you recognize the symptoms and respond promptly. Stroke Prevention Guidelines Know your blood pressure. Have it checked at least annually. If it is elevated, work with your doctor to keep it under control.