Facts | Diagnosis | Symptoms | Risk
factors | Prevention | Treatment
Facts
The carotid arteries supply blood to the front half of
the brain and are located on either side of the neck. Just as the arteries
in other parts of the body and the heart can become clogged, over time,
residue and build-up can accumulate in the carotid arteries. This build
up, known as plaque, can cause problems by limiting blood flow to the
brain or by fragmenting and sending small pieces of plaque that can block
the smaller arteries of the brain. In either situation, the blockage
of blood flow to the brain can result in a stroke.
Diagnosis
In some cases, carotid artery disease can be detected during
a normal physician checkup. In other cases, further testing may be needed.
These tests may include ultrasound imaging, CT angiography (CTA), magnetic
resonance angiography (MRA), or traditional angiography. Angiography
consists of an X-ray of the carotid arteries and arteries of the brain
taken by injecting a special dye into the arteries. CTA and MRA are relatively
new imaging techniques that avoid most of the risks associated with angiography,
however, CTA and MRA images are sometimes not quite as definitive as
angiography.
Symptoms
Symptoms in cases of carotid artery disease are not always
present, so those at risk should especially undergo regular screenings.
The symptoms of carotid artery disease are similar to those of a stroke
and include:
- Numbness, weakness or paralysis in the face, arm or
leg, especially on one side of the body
- Confusion or difficulty speaking
- Difficulty seeing in one or both eyes
- Difficulty swallowing
- Slurred speech
- Dizziness
- Difficulty walking or loss of balance and coordination
- Sudden, severe headache with no known cause
- Nausea and/or vomiting
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Risk Factors
These factors contribute to a person’s risk of experiencing
a stroke as well as the likelihood of surgical complications:
- High degree of stenosis
- Gender (males have a higher risk than females)
- Diabetes
- Type of stroke symptoms
- Blockage of the carotid artery on the opposite side
- Personal or family history of coronary artery disease
or carotid artery disease
- Elevated cholesterol and LDL levels
- Hypertension
- Age (greater in men than women under age 75, but higher
in women after age 75)
- Smoking
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Prevention
- Monitor blood pressure to keep it at a healthy level.
- Maintain a healthy weight through a balanced diet and
exercise.
- Avoid smoking.
- Get screened for carotid stenosis.
- Limit alcohol intake.
- Take anticoagulation medication (blood-thinners) such
as aspirin
Click here to
learn how to prevent other neurological diseases.
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Treatment
Carotid endarterectomy
Carotid endarterectomy is a surgical procedure used to prevent stroke.
It involves removing fatty deposits that are blocking one of the two
carotid arteries. The surgery has been found highly beneficial for
persons who have already had a stroke or experienced the symptoms of
a stroke and have a severe stenosis. On average, about 132,000 carotid
endarterectomies are performed in the United States each year.
Carotid stenting
Another treatment option for carotid artery disease is angioplasty and
stenting. This technique is relatively new and is only approved by
the FDA for use in certain patients. Carotid artery angioplasty and
stenting involves opening up the blockage in the artery with a balloon
and then placing a metallic mesh tube (known as a stent) in the blocked
segment of the artery to keep the artery open. A filter is used during
this procedure to prevent any of the plaque that might break off from
reaching the brain and causing a stroke. Data concerning the long-term
efficacy of carotid stenting is currently being gathered and will likely
broaden the selection criteria used by the FDA.
Intracranial stenting
Intracranial stenting is used to treat intracranial atherosclerosis.
When blood vessels drastically narrow, blood flow to the brain is limited,
which places someone at a high risk of stroke. Intracranial stenting
is performed on patients who have not responded to nonsurgical treatments
and who are at high risk for surgical bypass procedures. Just like
with carotid artery angioplasty and stenting, a blocked artery in the
brain is first treated with angioplasty followed by passing a small
stent to keep the blood vessel open. The arteries in the brain, however,
are too small to use a filter. The procedure involves minimal pain
and usually provides immediate relief for patients.
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