In short
Coronary angiography is an X-ray test that uses contrast dye, delivered through a thin tube (catheter), to show the arteries that supply the heart muscle. It shows whether any arteries are narrowed or blocked and helps guide treatment decisions.
Who may be assessed for angiography
A cardiologist may recommend angiography when symptoms such as chest discomfort, test results or other findings suggest coronary artery disease, or to plan treatment. It is not a routine screening test, and not everyone with chest pain needs it. The decision balances the information it will provide against its risks.
What generally happens
Angiography is performed in a hospital catheterisation laboratory. A local anaesthetic is used and a thin catheter is passed through an artery, usually at the wrist or groin, to the heart. Contrast dye is injected and X-ray images are recorded. Most people are awake, sometimes with a mild sedative.
If a significant narrowing is found, it may sometimes be treated during the same procedure with angioplasty and a stent, provided this has been discussed with you beforehand.
How it differs from other tests
An ECG records electrical activity, an echocardiogram uses ultrasound to show the heart’s structure and pumping, and an exercise stress test looks at how the heart responds to exertion. Angiography is different: it directly images the coronary arteries, and it is invasive.
Risks and limitations
Angiography is commonly performed and serious complications are uncommon, but no procedure is risk-free. General risks include bruising or bleeding at the catheter site, reaction to the contrast dye, effects on kidney function, and, rarely, damage to an artery, heart rhythm problems, heart attack or stroke. Your individual risk will be discussed with you before you consent.
Alternatives
Depending on the question being asked, non-invasive tests such as stress testing or CT imaging of the coronary arteries may be options. Your cardiologist can explain why angiography is, or is not, the most suitable test for you.
Recovery and follow-up
Recovery and follow-up are planned individually. How long you stay, when you can drive, return to work or exercise, and any change to your medicines depend on your condition and the procedure, and are discussed with you by the treating team. Do not stop or change prescribed medicines unless the prescribing clinician advises it.
Where it takes place
Where a procedure is recommended, the practice will confirm the hospital venue, the admission arrangements and any preparation when your care is arranged. Procedures are not performed in the consulting suite.
Questions to ask your clinical team
- Why do you recommend angiography for me rather than another test?
- Will you use the wrist or the groin, and why?
- If you find a narrowing, might you treat it during the same procedure?
- Do I need to change any of my medicines beforehand? (Ask the treating team — do not change them on your own.)
Common questions
Is coronary angiography painful?+
A local anaesthetic numbs the access site. Many people feel pressure rather than pain, and a brief warm sensation when the dye is injected.
Do I need to fast?+
Preparation instructions vary. The practice or hospital will give you specific instructions when your procedure is arranged.
Sources and further reading
General patient education written in plain language and informed by the sources above. It is not a substitute for an individual assessment, and does not describe practice-specific fees, referral rules or preparation — please confirm these with the practice.