A stent is a small, tube-like device used to keep blood vessels open, especially in the case of narrowed or blocked arteries. Doctors often use stents during a procedure called angioplasty, where they insert the stent into the affected artery to improve blood flow. This is particularly important for patients with coronary artery disease, as it helps prevent heart attacks. Stents can be made from metal or plastic and may be coated with medication to reduce the risk of restenosis, which is the re-narrowing of the artery. After a stent is placed, patients usually feel better and can return to their normal activities more quickly, improving their overall health and quality of life.