Few words worry patients and families more than "we need to do an angiography." Much of that worry comes from not knowing what the test involves. This article walks through what happens before, during and after — so that if you or a family member is advised to have one, the day itself holds fewer surprises.
What is an angiography?
A coronary angiography is a test that shows the arteries supplying your heart. A thin, flexible tube called a catheter is guided to the heart, a dye is injected, and X-ray images show exactly where the arteries are narrowed or blocked and by how much.
It is a test, not a treatment. Its job is to answer a question: are the arteries blocked, and if so, where and how severely?
What is an angioplasty?
If the angiography shows a significant blockage, it may be opened in the same sitting. A balloon is passed to the narrowed segment and inflated to widen it. In most cases a stent — a small metal mesh tube — is then placed to hold the artery open. In some carefully selected situations a medicine-coated balloon may be used instead of a stent.
This is called angioplasty, or PCI. Whether it is done immediately or planned for later depends on your condition, the pattern of blockages and a discussion with you and your family.
Before the procedure
- You will usually be asked not to eat for a few hours beforehand. Most regular medicines are continued — but tell the team about diabetes medicines and blood thinners specifically, as some need adjusting.
- Blood tests, an ECG and often an echocardiogram are done first.
- Tell the team about any allergy, especially to iodine or contrast dye, and about kidney problems or previous reactions.
- Consent is taken. This is the right moment to ask questions — nothing is too small to ask.
During the procedure
- You are awake. This surprises many people. Only local anaesthetic is used, at the wrist or the groin, where the catheter goes in.
- You will feel a small prick and some pressure at that spot. The catheter moving inside the artery is not painful — arteries have no sensation of that kind.
- When the dye is injected you may feel a brief warm flush. This is normal and passes in seconds.
- An angiography alone often takes 15–30 minutes. If angioplasty is done as well, it takes longer.
- You may be asked to hold your breath briefly for clearer pictures.
- Tell the team at once if you feel chest pain, breathlessness, itching or nausea during the procedure.
After the procedure
- Wrist (radial) access: a tight band is applied and gradually loosened over a few hours. You can usually sit up and eat soon after.
- Groin (femoral) access: you will need to lie flat with the leg straight for several hours to prevent bleeding.
- Drink fluids as advised — this helps clear the dye through the kidneys.
- For an angiography alone, discharge is often the same day or the next. After an angioplasty, a short hospital stay is usual.
- Mild bruising or tenderness at the puncture site is common. Swelling that grows, fresh bleeding, severe pain, or a cold or numb hand or leg should be reported immediately.
Risks — stated plainly
Angiography is a commonly performed and generally safe procedure, but no procedure is without risk. The recognised risks include bleeding or bruising at the puncture site, reaction to the contrast dye, effects on kidney function, and — uncommonly — more serious complications involving the artery, heart rhythm or, rarely, stroke. Your risk depends on your age, kidney function, diabetes, and how urgent and complex the procedure is. Ask your cardiologist to explain your risk, not the average one.
If a stent is placed
Two things matter enormously afterwards:
- Take your blood-thinning medicines exactly as prescribed, and never stop them on your own. Stopping early — even for a dental procedure — can cause the stent to clot suddenly. Always ask your cardiologist first.
- A stent treats a blockage; it does not cure the disease. Blood pressure, cholesterol, diabetes control, stopping tobacco and regular activity are what prevent the next blockage.
Questions worth asking your cardiologist
- Is this angiography being done for diagnosis, or is angioplasty likely in the same sitting?
- Will access be through the wrist or the groin, and why?
- If blockages are found, what are my options — medicines, stent, or bypass surgery?
- What medicines will I need afterwards, and for how long?
- When can I return to work, drive, and resume normal activity?
The short version
An angiography is a short, awake procedure that gives a clear, direct answer about your heart arteries — usually a far better answer than repeated indirect tests. Understanding what will happen removes most of the fear. Ask questions freely; a well-informed patient recovers better.
This article is for general education only. It is not a substitute for individual medical advice, diagnosis or treatment. Every patient's situation is different — please consult your own doctor about your specific condition. If you have severe or ongoing chest pain, breathlessness or collapse, treat it as an emergency and seek care immediately.
Dr. Rohan P. Parikh, Interventional Cardiologist, Anand · 24×7 emergency: +91 70690 53852