CT Coronary angiogram

What is a CT coronary angiogram?

A CT coronary angiogram is a specialised heart scan that uses a high resolution CT X ray machine to take detailed pictures of the coronary arteries — the vessels that supply blood to your heart muscle. This test checks whether there is any narrowing or disease in these arteries that may be affecting blood flow to your heart.

What are the benefits of a CT coronary angiogram?

A CT coronary angiogram helps to:

• Identify whether there is evidence of coronary artery disease, including any narrowing or blockages.
• Provide detailed images of your heart and blood vessels without the need for a more invasive procedure.
• Support your medical team in recommending the most appropriate treatment, which may help reduce the risk of future heart problems.

Overall, it is less invasive than a standard coronary angiogram and carries fewer risks while still giving highly useful diagnostic information.

Is a CT coronary angiogram right for me?

You may have been referred for this scan if you have symptoms such as chest pain or shortness of breath, or if your doctor wants to investigate the structure of your heart and the possible cause of your symptoms.

It may also be recommended if your clinical team feels this is the most suitable next step before considering more invasive procedures.

If you have specific medical conditions (e.g., asthma, kidney problems, atrial fibrillation, a pacemaker, are pregnant or have had previous reactions to contrast dye), please inform the department beforehand so the team can plan your care safely.

You will be asked to avoid caffeine for 12 hours prior to the procedure, this includes decaffeinated drinks and chocolate, as well as some medications which contain caffeine.

What happens during a CT coronary angiogram?

• You will be given a beta blocker medication to gently slow your heart rate to enable us to get clear images of the vessels supplying blood to your heart.
• You will lie on your back on the CT scanner bed and will have ECG leads connected so that your heart rate can be monitored throughout the examination
• A small amount of GTN spray may be given under your tongue to widen the arteries so the images are as clear as possible. This may give you a brief, mild headache.
• A contrast dye will be injected during the scan to clearly show the blood vessels of your heart.
• The scan itself only takes a short time, but you may be in the department for 1–4 hours to ensure that you well prepared prior to the scan and are feeling well after the scan Recovery
• After the scan, you may need to remain in the department until your heart rate returns to normal.
• Some people feel slightly tired afterwards; avoiding strenuous activity for the rest of the day is advised.
• You can otherwise return to normal activities once you feel able.

Radiation exposure from the scan is small, and for most people, the benefits of having the test outweigh the risks. Pregnant women should avoid radiation unless medically essential.