CT Coronary Angiogram (CTCA)

CT coronary angiography is a specialised CT scan that provides detailed images of the coronary arteries, which supply blood to the heart muscle.

It is one of the most accurate non-invasive tests available for assessing whether narrowing or plaque is present in the coronary arteries.

What can CT coronary angiography show?

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CT coronary angiography can detect:

• narrowing of the coronary arteries

• early coronary plaque before severe narrowing develops

• calcified and non-calcified plaque

• anomalies of the coronary arteries

• features that may explain symptoms such as chest pain

The scan provides a detailed assessment of coronary artery anatomy and helps determine whether symptoms may be related to coronary artery disease.

When might CT coronary angiography be recommended?

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CT coronary angiography may be useful if you experience:

• chest pain or chest tightness

• symptoms suggestive of angina

• unexplained breathlessness

• abnormal ECG findings

• intermediate risk of coronary artery disease

It is frequently used to investigate chest pain and to rule out significant coronary artery disease.

What happens during the test?

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The scan involves an intravenous contrast injection to allow the coronary arteries to be clearly visualised.

Before the scan, medication may be given to slow the heart rate and improve image quality.

The test:

• is non-invasive

• usually takes around 15 to 20 minutes

• involves a small amount of radiation

• provides highly detailed images of the coronary arteries

What happens after the test?

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The results help determine whether coronary artery disease is present and whether treatment or further investigation is needed.

In many cases the scan can provide reassurance when the coronary arteries appear normal.