A CT coronary angiogram (CTCA) is a non-invasive scan that uses contrast dye and CT imaging to visualise the coronary arteries and detect narrowings or blockages.
A non‑invasive CT scan using contrast dye to visualise the coronary arteries, helping to diagnose or exclude coronary artery disease with high accuracy.
A CT coronary angiogram is a non-invasive imaging test that provides detailed pictures of the heart's blood vessels. During the procedure, you will lie on a table that slides into a CT scanner. A contrast dye will be injected through an intravenous (IV) line to enhance the images of the coronary arteries. You may be asked to hold your breath for short periods while the images are being taken.
This test is particularly useful in assessing the presence of coronary artery disease, detecting blockages, and evaluating the overall function of the heart. By providing clear images of the blood vessels, the CT coronary angiogram helps cardiologists diagnose potential issues and plan appropriate treatment strategies to improve heart health.
A CTCA is a non-invasive imaging test that uses a CT scanner and contrast dye to produce detailed pictures of the coronary arteries, helping to detect blockages or narrowing without the need for a catheter.
The scan itself takes only a few minutes. The full appointment, including preparation and contrast dye injection, is around 30 minutes.
No. You may feel a brief warm sensation when the contrast dye is injected and you will need to hold your breath for a few seconds, but the procedure is painless.
No NHS referral is required. You can book directly with us for a private CT coronary angiogram.
Avoid caffeine for 12 hours before the scan. Continue your normal medications unless advised otherwise. You may be given a beta-blocker beforehand to slow your heart rate for clearer images.
Reviewed by Dr Matthew Balerdi, Consultant Imaging Cardiologist (FRCP) — Last reviewed: April 2026
No NHS referral required. Get rapid access to a private CT coronary angiogram with specialist reporting.