Carotid artery disease may not cause signs or symptoms until it severely narrows or blocks a carotid artery. Signs and symptoms may include a bruit (broo-E), a transient ischemic attack (TIA), or a stroke.
During a physical exam, your doctor may listen to your carotid arteries with a stethoscope. He or she may hear a whooshing sound called a bruit. This sound may suggest changed or reduced blood flow due to plaque buildup. To find out more, your doctor may recommend tests.
Not all people who have carotid artery disease have bruits.
For some people, having a TIA, or “mini-stroke,” is the first sign of carotid artery disease. During a mini-stroke, you may have some or all of the symptoms of a stroke. However, the symptoms usually go away on their own within 24 hours.
The symptoms may include:
Even if the symptoms stop quickly, you should see a doctor right away. Call 9–1–1 for help. Do not drive yourself to the hospital. It's important to get checked and to get treatment started as soon as possible.
A mini-stroke is a warning sign that you're at high risk of having a stroke. You shouldn't ignore these symptoms. About one-third of people who have mini-strokes will later have strokes. Getting medical care can help find possible causes of a mini-stroke and help you manage risk factors. These actions might prevent a future stroke.
Although a mini-stroke may warn of a stroke, it doesn't predict when a stroke will happen. A stroke may occur days, weeks, or even months after a mini-stroke. In about half of the cases of strokes that follow TIAs, the strokes occur within 1 year.
The symptoms of a stroke are the same as those of a mini-stroke, but the results are not. A stroke can cause lasting brain damage; long-term disability, such as vision or speech problems or paralysis (an inability to move); or death. Most people who have strokes have not previously had warning mini-strokes.
Getting treatment for a stroke right away is very important. You have the best chance for full recovery if treatment to open a blocked artery is given within 4 hours of symptom onset. The sooner treatment occurs, the better your chances of recovery.
Call 9–1–1 for help as soon as symptoms occur. Do not drive yourself to the hospital. It's very important to get checked and to get treatment started as soon as possible.
Make those close to you aware of stroke symptoms and the need for urgent action. Learning the signs and symptoms of a stroke will allow you to help yourself or someone close to you lower the risk of brain damage or death due to a stroke.
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.