CT Coronary Angiogram (CTCA)

What is a CT coronary angiogram?

A computed tomography (CT) coronary angiogram is a special imaging test that looks at your heart’s arteries to see if they are narrowed or blocked. It uses a powerful x-ray to produce a cross section of your heart and its blood vessels. The computer then produces a real-time image on screen to provide clear and accurate information about what’s happening inside your heart and coronary arteries.

Why do I need a CT coronary angiogram?

We use a CT coronary angiogram to check for various heart conditions, diagnose the cause of chest pain and other investigate other symptoms. It’s a powerful tool that helps us work out treatment options. We can also use a CT coronary angiogram to help us accurately perform other procedures, like angioplasty (stent) surgery.

What is involved in a CT coronary angiogram?

After numbing the area, you’ll have an intravenous (IV) line inserted in your hand or arm to inject the dye that is pumped through your heart and coronary arteries (the arteries supplying blood to your heart) to make them visible on the images. You’ll then lie down and a bed will position you inside the scanner.

You may also be given other medications to slow your heart rate (beta blockers) or widen your arteries (nitroglycerin) to produce a clearer image. Let us know if you’ve had side effects from either of these medications in the past. You might also be given medication to lower your risk of a reaction to the dye (contrast) if needed. If you have poor kidney function or are diabetic please let us know.

What are the risks of the CT coronary angiogram procedure?

If you’re being given the dye you’ll be given an information sheet detailing the risks and benefits. During the injection you may notice a brief warm sensation, with a taste or smell of medicine, which passes quickly. You’ll be monitored for any signs of an allergic reaction.

How long does a CT coronary angiogram take?

The procedure usually takes 1 hour including preparation and follow up monitoring. The scan itself only takes a few minutes.