1. You will be given a local anaesthetic in your wrist or at the top of your leg (groin) to numb the area.
2. The doctor will put a narrow flexible tube called a catheter into an artery in your wrist or groin. It will have a small balloon at the end.
3. The catheter is carefully pushed up to your heart and into the coronary arteries.
4. The doctor will inject some dye into the tube so your heart arteries show up on an x-ray screen. It’s normal to feel a hot flushing sensation when the dye is injected.
5. The tip of the catheter is moved into the narrowed section of the artery.
6. The balloon is gently blown up so that it squashes the fatty deposits against the artery wall. This widens the artery so the blood can flow more easily.
7. A stent (a small hollow tube of stainless steel mesh) may need to be placed inside the artery. This means putting in another tube, which has a stent in position on the balloon. As the balloon is blown up the stent opens up inside the artery.
8. The balloon is let down and the tube is removed. The stent is left in place to keep the artery open.