During an angioplasty, a small balloon is inflated inside a narrowed blood vessel. The balloon helps to widen the blood vessel and improve blood flow. After widening the vessel with angioplasty, a stent is sometimes inserted. These are tiny mesh tubes that support artery walls to keep vessels wide open. Angioplasty and stenting are usually done through a small incision or puncture in the skin. A long, thin tube called a catheter is inserted. Using X-ray guidance, the catheter is guided through your blood vessels to the blocked area. The tip of the catheter carries the angioplasty balloon or stent.Angioplasty most often is used to treat hardening of the arteries supplying blood to your limbs or to organs in your body other than your heart.