What is a carotid artery scan, and should you have one?
A carotid ultrasound assesses artery wall thickness and plaque. Learn how it can contribute to a personalised cardiovascular prevention plan.
- Updated
- 4 min read
- By Charmaine Shepherd, IFM Certified Practitioner
A carotid ultrasound examines the arteries in your neck, measuring wall thickness and looking for plaque. In selected people, the findings can add information to a cardiovascular assessment. I interpret them alongside blood markers, blood pressure, family history and metabolic health, then develop a prevention plan. The clinic assessment costs £456.
Feeling well is a good time to think about prevention. Cardiovascular risk can build over years before symptoms appear, and a standard cholesterol panel gives us only part of the picture.
Carotid ultrasound can help us assess whether there is visible plaque in the neck arteries. The important question is how that information would influence your care.
What is a carotid artery scan?
The carotid arteries supply blood to your brain. Ultrasound uses sound waves to examine their walls without radiation.
CIMT stands for carotid intima-media thickness: the combined thickness of two layers of the artery wall. The examination can also look for plaque, a focal build-up within the wall. These are distinct measurements and should be interpreted separately.
What can a carotid artery scan detect?
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Wall thickness in the areas measured.
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The presence and location of visible plaque.
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Some features of plaque, including calcification.
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Blood flow or narrowing when the examination includes the relevant Doppler assessment.
Wall thickening does not always mean atherosclerotic plaque; age and blood pressure can also affect it. The scan does not examine all your arteries or establish whether an individual plaque will rupture.
Why is it useful if my cholesterol is normal?
A current cholesterol result does not describe your lifetime exposure or every inherited risk factor. Plaque may be present despite a reassuring standard panel.
In a suitable person, imaging can add context to blood pressure, ApoB, Lp(a), glucose regulation and family history. A clear scan is reassuring about the areas examined, but does not remove the need to manage other risks.
Who should consider a carotid artery scan?
We may discuss it if risk remains uncertain, particularly with a strong family history, raised Lp(a), significant lipid abnormalities or metabolic risk, and where the result could change the prevention plan.
Menopause or an inflammatory condition can prompt a broader cardiovascular review, but neither automatically means you need a scan.
Guidelines recommend against routine screening for carotid narrowing in adults without symptoms. The ESC also does not recommend routine CIMT alone for risk prediction. It recognises plaque assessment as a possible risk modifier in selected people, especially when coronary calcium scoring is unavailable or unsuitable.
Read Should you have a carotid artery scan if you feel well? New TIA or stroke symptoms require urgent medical care rather than a private screening appointment.
What happens during the scan?
| What to expect | Details |
|---|---|
| Location | Clinic in Edinburgh |
| Scan duration | Usually 20 to 30 minutes within a longer assessment |
| Preparation | Wear clothing allowing easy access to your neck |
| Procedure | You lie comfortably while a probe and gel are moved over your neck |
| Radiation | None |
| Fee | £456 |
What happens if plaque is found?
We review the amount and location of plaque alongside your overall risk. Findings may support more intensive prevention and a discussion with your medical team about lipid-lowering treatment.
I also look at blood pressure, glucose regulation, nutrition, smoking, activity and relevant inflammatory conditions. The aim is a clear plan with measurable priorities.
Repeat imaging is considered individually. Small changes can reflect measurement variation, so follow-up needs a clinical purpose and consistent technique.
How does it fit into functional medicine?
The scan can help inform an assessment, while the wider consultation explores the factors influencing your vascular health. We use the combined information to decide where action is most worthwhile.
See my Carotid artery scan guide, heart health guide and Carotid artery scan, cholesterol test or calcium score: which tells you most?
When to get urgent help
Call 999 for sudden face drooping, arm weakness, speech difficulty or other suspected stroke symptoms, even if they resolve. Chest pressure with breathlessness, sweating or pain spreading to the arm or jaw also needs emergency help.
Common questions
Is a carotid scan painful?
It is usually comfortable. You may feel light pressure from the probe.
Can a carotid scan show soft plaque?
Ultrasound can identify some non-calcified plaque, but cannot determine the stability of every plaque or guarantee that all disease has been detected.
Does a normal scan mean I won’t have a heart attack?
No. It assesses the neck arteries, not every coronary artery. Your other risk factors still matter.
How often should I have a scan?
There is no universal interval. We consider the initial findings, your risk and whether repeating it would change management.
Want to understand your cardiovascular risk more clearly? Book a free discovery call.
Sources
Should you have a carotid artery scan if you feel well?
Carotid artery scan, cholesterol test or calcium score: which tells you most?
What is Lp(a), and should you get it tested?
This article is for general information and isn't a substitute for personal medical advice. Please don't start or stop any medication without speaking to your GP or prescriber.