What is a coronary angiogram?
Coronary angiography uses X-rays and a contrast dye to show the arteries that supply blood to the heart muscle. The resulting images help the cardiologist identify narrowed or blocked areas.
This page describes catheter-based coronary angiography. A CT coronary angiogram is a different imaging test that uses a CT scanner; your doctor will explain which test is being considered.
Why might the test be recommended?
The test can help assess suspected coronary artery disease and guide treatment planning. Findings are considered alongside your symptoms, medical history and other investigations.
Depending on the results, options may include medicines, angioplasty with stenting or coronary bypass surgery. An angiogram does not automatically mean that a stent will be needed.
What happens during angiography?
A thin, flexible catheter is introduced through a blood vessel, usually at the wrist or groin, and guided towards the coronary arteries. Contrast dye is injected so the arteries can be seen on X-ray images.
Your heart rate and rhythm are monitored during the procedure. Tell the team if you feel unwell or uncomfortable. The test often takes around half an hour, although the time can vary or be longer if treatment is carried out.
After the test
You will be monitored after the procedure and the catheter entry site checked for bleeding. Some patients go home after a period of observation; others need an overnight stay.
Your discharge instructions should cover wound care, medicines, activity and follow-up. Ask your team for fluid advice that takes account of your heart and kidney health rather than increasing your fluid intake on your own.
Discussing preparation and risks
Tell your care team about your medicines, allergies, previous reactions to contrast dye and any kidney problems. Follow their instructions about eating, drinking and medicines before the procedure.
Bruising or bleeding may occur at the catheter site. Less common complications include a contrast reaction, kidney injury, blood vessel damage, a heart attack or stroke. Your doctor will explain how the potential benefits and risks apply to you.
YOUR QUESTIONS
A little more clarity.
Is a coronary angiogram a treatment?
It is primarily an imaging test. If a suitable narrowing is found, angioplasty may sometimes be performed during the same session, following discussion and consent.
How long will I be in hospital?
Observation time depends on the access site, your health and whether further treatment is performed. Your team will give you a discharge plan.
Is this the same as a CT angiogram?
No. A catheter-based angiogram and a CT coronary angiogram use different approaches. Ask your doctor which examination is planned.