Health Topic

Angioplasty

Angioplasty is a procedure to restore blood flow through narrow or blocked arteries. Learn about how stents and angioplasty work.

Reviewed Reviewed by a registered pharmacistGeneral information

Also called: Balloon angioplasty · Coronary angioplasty · Percutaneous coronary intervention (PCI)

Important: This page is general information, not medical advice. It does not recommend or prescribe any treatment. Always consult your doctor or pharmacist before starting, stopping or changing any medicine.

About Angioplasty

Angioplasty is a procedure to improve blood flow in coronary arteries that have become narrow or blocked. Your coronary arteries supply oxygen-rich blood to your heart. If you have coronary artery disease, a sticky material called plaque builds up in your coronary arteries. Plaque is made of cholesterol, calcium, and other substances in your blood. Over time, it can narrow your arteries or fully block them. When this happens, some parts of your heart don't get enough blood.

Angioplasty widens the blocked part of your artery so more blood can get through. It is also called percutaneous coronary intervention (PCI).

Doctors (usually a heart specialist called a cardiologist) use angioplasty to:

  • Reduce chest pain from blockages in the coronary arteries. This type of pain is called angina. There are different types of angina. Angioplasty treats certain types.
  • Limit damage to the heart during or right after a heart attack. In this case, angioplasty is an emergency treatment.

Angioplasty does not cure coronary artery disease. To help prevent more plaque blockages, you'll need to take any prescribed medicines, eat healthy foods, and get regular exercise.

Most people have angioplasties in a hospital in a special room called a cardiac catheterization, or cath, lab. You will be awake and lying down. You'll get medicine to help you relax through an intravenous (IV) line. This is a small tube that goes into a vein in your hand or arm.

Angioplasty is done through a blood vessel in your arm, wrist, or groin. Your doctor will:

  • Make a small opening in that area to insert a thin tube (a catheter) into a blood vessel.
  • Thread the tube through the vessel to your heart, using x-rays as a guide.
  • Inject contrast dye inside your arteries. The dye highlights your heart and blood vessels in the x-rays.
  • Replace the first tube with another one that has a small, deflated balloon on the end.
  • Guide the balloon inside the blockage and inflate it to push the plaque flat against the artery wall. This makes the artery wider and improves blood flow.
  • Sometimes put a small, mesh tube into the artery to help keep it open. The tube is called a stent. Some stents have a coating of medicine that helps prevent blood clots from forming.

If you had an angioplasty for chest pain, you'll go to a recovery room for a few hours. You may stay in the hospital overnight. Your doctor will probably prescribe medicines to prevent blood clots. Most people can return to their usual activities after a week.

If you had an emergency angioplasty for a heart attack, you'll need to stay in the hospital for about a few more days.

Angioplasty is very safe, but every invasive procedure comes with risks. You may get a bruise, feel sore, or have some bleeding where the tubes were inserted. More serious problems don't happen very often, but they are possible. They can include serious bleeding, blood clots, and narrowing of the artery again.

It sits within Blood, Heart and Circulation and Surgery and Rehabilitation.

The lead U.S. institute for this subject is the National Heart, Lung, and Blood Institute.

When to speak to someone. Reading about a topic cannot tell you whether it applies to you. Speak to a doctor or pharmacist if symptoms are severe, sudden, getting worse, or simply not going away — and seek emergency care immediately for chest pain, breathing difficulty, sudden weakness or confusion, or a serious allergic reaction.

Research on Angioplasty

962 studies areregistered for this condition on ClinicalTrials.gov, the U.S. National Library of Medicine's public registry. A selection is below — the links go straight to the registry entry, not to a summary of ours.

What a registered study does and does not mean. Registration means a study exists and has been declared publicly. It says nothing about whether the treatment being tested works, is safe, or is available to you. Many studies find no benefit — that is what research is for. Never seek out an experimental treatment on the strength of a registry entry alone.

Research currently under way

Research already completed

Study data from ClinicalTrials.gov, a service of the U.S. National Library of Medicine. Retrieved 2026-07-30. Registry entries are supplied by study sponsors and investigators; ClinicalTrials.gov does not verify their scientific validity. PocketsInfo is not affiliated with, and not endorsed by, the NLM or the NIH.

Where to read more

Rather than paraphrase, we point you to the primary sources. Every link below is to a government health agency, a national institute or a recognised medical body — grouped by what you are trying to find out.

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Related Issues

Clinical Trials

Medical subject headings

Clinicians and researchers index this subject under Angioplasty. These are the terms to use when searching medical literature.

This page is built from the MedlinePlus health topic record for Angioplasty, a service of the U.S. National Library of Medicine (NLM), National Institutes of Health. Information is from MedlinePlus.gov. PocketsInfo is not affiliated with, and is not endorsed by, the NLM or the NIH. Retrieved 30 July 2026.