Carotid Ultrasound
A safe, non-invasive scan of the main arteries in your neck that supply blood to your brain. It screens for plaque buildup, arterial thickening, and stroke risk.
Key facts at a glance
Why vascular health matters.
Stroke Link
Narrowing or clots from the carotid arteries account for roughly 1 in 5 ischemic strokes.
~20%
Safety
Uses sound waves (ultrasound) only. No radiation, no needles, and no pain.
100% Safe
Early Warning
Carotid Intima-Media Thickness (CIMT) can reveal arterial aging before significant plaque even forms.
CIMT
Procedure Time
A quick outpatient procedure performed by a sonographer.
~15-30 min
Who this is for
- Individuals with high cholesterol (high LDL or ApoB).
- Those with high blood pressure or a family history of stroke.
- People interested in a "functional age" of their arteries via CIMT measurement.
What it detects
- Stenosis: Narrowing of the artery that restricts blood flow.
- Plaque Composition: Distinguishes between stable (calcified) and potentially unstable (soft) plaque.
- Arterial Wall Thickness: Early thickening (CIMT) suggests systemic atherosclerosis.
How it Works
- A sonographer applies gel to your neck and uses a handheld probe (transducer).
- Sound waves bounce off blood cells and arterial walls to create images.
- Doppler ultrasound also lets them hear and measure the speed of blood flow, which speeds up through narrow spots.
Interpreting Results
- Normal: Smooth arterial walls, no plaque, normal flow speeds.
- Increased CIMT: Arterial walls are thicker than expected for your age; indicates early vascular aging and need for aggressive risk factor control.
- Plaque Present: Distinct deposits found. If they don't block flow significantly (< 50%), medical management (statins, lifestyle) is usually key.
- Significant Stenosis (>50-70%): Severe narrowing. May require referral to a vascular specialist.
Limitations
- Operator Dependent: The quality of the scan depends on the skill of the sonographer.
- Scope: Only visualizes the neck arteries, not the arteries inside the skull (intracranial) or the heart itself (coronaries).
References
Clinical guidelines and studies.
- ASE Consensus Statement: Carotid Intima-Media Thickness — Journal of the American Society of Echocardiography (2008)
- Gupta A, et al.. Carotid Plaque and Risk of Ischemic Stroke — Stroke (2013)
- Screening for Asymptomatic Carotid Artery Stenosis — USPSTF Recommendation Statement (2021)View source — Discusses population-wide screening vs. targeted high-risk assessment
Content is educational and not medical advice. For personal recommendations, consult your clinician.