Medically reviewed by Nachiket J. Patel, MD, FACC, FSCAI. Last reviewed July 2026.
The carotid arteries carry blood through the neck to the brain. Carotid artery disease develops when atherosclerotic plaque narrows one of these vessels.
The narrowing itself usually does not hurt. Many people feel completely well until an ultrasound finds the disease or a transient ischemic attack, often called a TIA, exposes the problem.
Evaluation should answer two practical questions: how likely is the plaque to cause a stroke, and will medication alone or a procedure provide the safer path forward?
How can carotid plaque lead to a stroke?
A plaque can gradually reduce the space inside the artery. More importantly, material from an unstable plaque can break loose and travel into a smaller brain artery. A clot may also form at the plaque surface.
The degree of narrowing matters, but it is not the only factor. Recent neurologic symptoms, plaque characteristics, age, overall health, and procedural risk all influence treatment decisions.
What are the warning signs of a TIA or stroke?
Call 911 for any sudden neurologic symptom, even if it begins to improve. A TIA can last only minutes, but it is a warning that a stroke may follow.
- Weakness or numbness of the face, arm, or leg, especially on one side
- Facial droop
- New difficulty speaking or understanding speech
- Sudden loss or dimming of vision in one eye
- Abrupt loss of balance or coordination
- A sudden severe headache with no clear cause
Who should be evaluated for carotid disease?
Testing is commonly performed after a TIA or stroke, when a clinician hears a neck bruit, or when another finding raises concern. Broad screening of every adult is not automatically helpful.
Risk factors include tobacco use, high blood pressure, diabetes, high cholesterol, kidney disease, older age, and established coronary or peripheral artery disease.
How is carotid artery disease diagnosed?
Carotid duplex ultrasound is usually the first test. It uses sound waves to evaluate plaque and blood-flow velocity without radiation or injections.
CT angiography or MR angiography may be ordered when more anatomic detail is needed. If results disagree, the images and measurement method should be reviewed rather than relying on a single percentage in a report.
How is carotid disease treated?
Every patient needs careful management of vascular risk. The plan may include antiplatelet therapy, intensive cholesterol treatment, blood-pressure and diabetes control, physical activity, and tobacco cessation.
Some patients with significant disease benefit from carotid endarterectomy or carotid artery stenting. The choice depends on whether symptoms occurred, the severity and location of disease, anatomy, age, medical conditions, and the experience of the treating team.
Dr. Patel can review vascular imaging, coordinate additional testing, and discuss whether evaluation by a vascular surgeon or a carotid-intervention team is appropriate. Procedures are performed in an appropriate hospital setting after individualized review.
Frequently asked questions
Can I feel a blocked carotid artery?
Usually not. Carotid narrowing generally does not cause neck pain. It is often found on imaging or after neurologic symptoms.
Does every carotid blockage need a procedure?
No. Many patients are treated with medication and risk-factor control. A procedure is considered when expected stroke prevention outweighs its risks.
What if my ultrasound and CT report give different percentages?
Different tests use different measurement methods. Reviewing the actual images and the clinical context can help reconcile the findings.
Related heart and vascular information
- Vascular Ultrasound Testing (Arterial, Venous, Carotid)
- Peripheral Artery Disease (PAD)
- Hyperlipidemia (High Cholesterol)
Schedule an appointment
If you have a stable heart or circulation concern, request an appointment with Flow Heart & Vascular in Mesa, Arizona. Call 911 for emergency symptoms.
This page provides general education and does not replace individualized medical advice.
