When your doctor places a stethoscope on the side of your neck during a physical exam, they’re often listening to the blood flow through your carotid arteries—two major blood vessels that supply oxygen-rich blood to your brain.
This simple exam can sometimes provide clues about carotid artery disease, a condition that increases the risk of stroke and may develop silently for years before causing symptoms.
Understanding carotid artery disease can help you recognize risk factors, warning signs, and the importance of prevention.
What Is Carotid Artery Disease?
The carotid arteries are located on both sides of your neck and carry blood from the heart to the brain.
Carotid artery disease occurs when these arteries become narrowed or blocked, usually due to:
Atherosclerosis
Over time, fatty deposits called plaque accumulate inside the artery walls, reducing blood flow and increasing the risk of blood clots.
Why Is It Dangerous?
The brain depends on a constant supply of oxygen and nutrients.
When carotid arteries become narrowed:
- Blood flow to the brain may decrease
- Plaque can rupture
- Blood clots can form
- Clots can travel to the brain
This can lead to:
Stroke
or a:
Transient Ischemic Attack
(TIA), often called a mini-stroke.
Does Carotid Artery Disease Cause Symptoms?
Often, no.
Many people have significant narrowing without realizing it.
In fact, the first sign may sometimes be a TIA or stroke.
This is why identifying risk factors and maintaining regular healthcare visits is important.
Warning Signs That Require Immediate Attention
Symptoms may occur when blood flow to the brain becomes temporarily interrupted.
These symptoms are similar to stroke symptoms and should be treated as a medical emergency.
Sudden Weakness
Especially on one side of the body.
Facial Drooping
One side of the face may appear uneven or numb.
Speech Problems
You may experience:
- Slurred speech
- Difficulty speaking
- Difficulty understanding language
Vision Changes
Possible symptoms include:
- Sudden vision loss in one eye
- Blurred vision
- Temporary blindness
Sudden Numbness
Particularly affecting one side of the face, arm, or leg.
Balance Problems
Difficulty walking, dizziness, or loss of coordination may occur.
Remember FAST
If stroke symptoms appear:
F – Face drooping
A – Arm weakness
S – Speech difficulty
T – Time to call emergency services
Immediate treatment can reduce brain damage and improve outcomes.
Why Does Your Doctor Listen to Your Neck?
During an examination, a healthcare provider may listen for a sound called a bruit (pronounced “broo-ee”).
A bruit is an abnormal sound created by turbulent blood flow through a narrowed artery.
Hearing a bruit does not confirm carotid artery disease, but it may prompt further evaluation.
Some people with significant disease have no bruit, while others with a bruit may not have severe narrowing.
Who Is at Higher Risk?
Several factors increase the likelihood of developing carotid artery disease.
High Blood Pressure
High Blood Pressure
can damage artery walls over time.
High Cholesterol
Elevated LDL cholesterol contributes to plaque formation.
Smoking
Smoking damages blood vessels and accelerates atherosclerosis.
Diabetes
Type 2 Diabetes
increases vascular disease risk.
Obesity
Excess weight is associated with multiple cardiovascular risk factors.
Age
Risk increases as people get older.
Family History
A family history of cardiovascular disease may increase risk.
How Is Carotid Artery Disease Diagnosed?
If your doctor suspects carotid artery disease, tests may include:
Carotid Ultrasound
The most common screening test.
It uses sound waves to evaluate:
- Blood flow
- Plaque buildup
- Degree of narrowing
CT Angiography
Provides detailed images of blood vessels.
MR Angiography
Uses magnetic resonance imaging to assess artery structure and blood flow.
Can Carotid Artery Disease Be Treated?
Yes.
Treatment depends on the severity of narrowing and whether symptoms have occurred.
Lifestyle Changes
These form the foundation of treatment and prevention.
Important steps include:
Stop Smoking
One of the most effective ways to reduce vascular risk.
Control Blood Pressure
Managing hypertension significantly lowers stroke risk.
Improve Cholesterol Levels
Diet, exercise, and medications may help.
Stay Physically Active
Regular activity supports cardiovascular health.
Manage Diabetes
Blood sugar control helps reduce blood vessel damage.
Medications
Doctors may prescribe medications to:
- Lower cholesterol
- Control blood pressure
- Reduce blood clot formation
Treatment plans vary by individual risk profile.
Procedures for Severe Narrowing
In some cases, procedures may be recommended to improve blood flow.
Examples include:
Carotid Endarterectomy
A surgical procedure that removes plaque from the artery.
Carotid Artery Stenting
A minimally invasive procedure that places a stent to keep the artery open.
The choice depends on the degree of narrowing, symptoms, and overall health.
Can Carotid Artery Disease Be Prevented?
Many cases can be delayed or prevented by controlling risk factors.
Key prevention strategies include:
✓ Don’t smoke
✓ Control blood pressure
✓ Manage cholesterol
✓ Stay physically active
✓ Maintain a healthy weight
✓ Control diabetes
✓ Eat a heart-healthy diet
✓ Attend regular health screenings
Frequently Asked Questions
Can carotid artery disease cause dizziness?
Dizziness alone is not the most common symptom, but neurological symptoms such as weakness, vision loss, and speech difficulty require urgent evaluation.
Is carotid artery disease common?
It becomes more common with age and shares many risk factors with heart disease.
Should everyone be screened?
Routine screening is not recommended for everyone. Your healthcare provider can determine whether testing is appropriate based on your symptoms and risk factors.
Bottom Line
Carotid artery disease occurs when plaque builds up in the carotid arteries that supply blood to the brain. The condition often develops silently but can significantly increase the risk of stroke and transient ischemic attacks (TIAs).
Risk factors include high blood pressure, high cholesterol, smoking, diabetes, obesity, and aging. Because symptoms may not appear until a serious event occurs, prevention through healthy lifestyle choices and management of cardiovascular risk factors is essential. If you experience sudden weakness, speech problems, facial drooping, or vision changes, seek emergency medical care immediately, as these may be signs of a stroke.
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