Have you ever seen a doctor listen to you with a stethoscope on either side of your neck? While listening, the doctor can sometimes hear a "whooshing" sound from the blood vessels in your neck , or a sound like water rushing through them. That's what we call a ``Carotid Bruit'' (pronounced "carotid bruee"). This is not something to be afraid of, but it is important to be aware of it.
What is this strange sound called `(Carotid Bruit)`?
Simply put, `(Carotid Bruit)` is an unusual, turbulent sound that occurs when blood flows in one or more of the main blood vessels in your neck, the `(Carotid Artery)`. Imagine it, like a calm river suddenly hitting a rock and starting to flow turbulently. That's how we call `(Turbulent Flow)` when blood flows in the veins, instead of flowing smoothly and in one way, but in a slightly chaotic and turbulent way . These `(Carotid Artery)` blood vessels are the ones that bring the oxygen and nutrients that your brain needs . So, if there is any problem with these vessels, it can affect the functioning of our brain.
A doctor may hear this `(Carotid Bruit)` sound by chance when you are being examined by a doctor. Hearing this sound can be a sign that your `(Carotid Artery)` is narrowed due to fatty deposits (we also call this `(Plaque)`) . However, sometimes people with healthy `(Carotid Artery)` can also hear this sound. Also, some people may not hear this sound even if their blood vessels are very narrow. Therefore, a doctor uses this `(Carotid Bruit)` sign as just one small piece of a larger puzzle. That is, hearing this sound alone does not determine that you have a serious illness, it is only a help in deciding whether further tests and treatment are needed.
What does a `(Carotid Bruit)` sound like?
This `(Carotid Bruit)` sound is similar to the sound of a fast-flowing river , a sound like "hush hush". You cannot hear this on your own. You can only hear this sound when a doctor gently presses his stethoscope (the instrument that is worn on your chest or back) on different parts of your neck and listens. The doctor may ask you to take a breath and hold it for a while. That is, to listen clearly to the sound of blood flowing.
If the doctor hears a ``Carotid Bruit'' like this, he will explain it to you, what it could mean, and whether you need to have any further tests. So, don't worry, okay?
Why does this `(Carotid Artery)` make this sound? What are the causes?
The main and most common cause of this ``Carotid Bruit`` is a condition called ``Atherosclerosis`` .
Atherosclerosis is the main enemy!
`( Atherosclerosis )` is a medical term. Simply put, it means that a fatty substance, more precisely `(Plaque)`, is deposited inside the blood vessels (arteries) in your body, and the space for blood to flow in those vessels (we also call it `(Lumen)`) gradually decreases. Imagine that over time, dirt builds up inside a water pipe and clogs the pipe, so too do these fatty layers `(Plaque)` build up inside our blood vessels, reducing the space for blood to flow. This `(Plaque)` buildup can lead to the formation of blood clots. This blood clot can either stop the flow of blood where it forms, or it can travel with the blood and block a vein in another place.
So, when plaque builds up in your Carotid Artery and narrows the artery, we call it Carotid Artery Stenosis . Hearing a Carotid Bruit can be a sign that you may have this condition.
Remember, the `(Carotid Artery)` is the one that supplies our brain with oxygen-rich blood . So, if this artery becomes clogged with `(Plaque)`, you are at increased risk of having a `(Transient Ischemic Attack - TIA)` (we also call this a temporary interruption of blood supply to the brain, some call it a "mini stroke"), or an `(Ischemic Stroke)` (paralysis caused by a blockage of a blood vessel supplying the brain). In both of these conditions, blood flow to the brain is reduced or completely lost.
That's why it's important to know if you have ` (Carotid artery stenosis) ` and if so, how severe it is. `(Carotid Bruit)` is only a warning sign, it doesn't tell you exactly how much `(Plaque)` you have. Therefore, a doctor won't decide that you have `(Carotid Artery Stenosis)` just by having `(Carotid Bruit)`, but will use it as a first step to investigate further.
Could there be other reasons?
Although plaque buildup is the most common cause of carotid bruit, it can also be caused by changes in the anatomy of the blood vessels. For example, people with rare conditions such as Fibromuscular Dysplasia (FMD) may also hear a carotid bruit. Your doctor will review your medical history to try to determine the cause of your carotid bruit.
Is having a `(Carotid Bruit)` serious?
A ``Carotid Bruit'' can sometimes be a sign of a serious problem , but not always. It can sometimes be a red flag that you may have ``Carotid Artery Stenosis''. If your ``Stenosis'', or narrowing of the artery, is severe, you will likely need treatment to reduce your risk of having a ``TIA'' or ``Stroke''. Your doctor will tell you if your condition is serious and if you need treatment. So don't panic and listen carefully to what your doctor says.
Can a ``Carotid Bruit'' be normal?
Yes, hearing a `(Carotid Bruit)` does not always mean that you have `(Carotid Artery Stenosis)`. Some people who have a `(Carotid Bruit)` may not have significant `(Plaque)` deposits in their blood vessels, and they may be healthy. Some people may have changes in the structure of their blood vessels, which may be normal, or it may be due to a condition like `(FMD)`. That is why `(Carotid Bruit)` is only the first step in the process of diagnosing and treating `(Carotid Artery)` related diseases.
If the doctor says there is a ``Carotid Bruit'', what happens next?
If your doctor hears a ``Carotid Bruit'', it may be a sign that something is wrong. The doctor may then order further tests to determine the exact condition of your ``Carotid Artery''.
What are the further tests?
The most common test done at this time is a Carotid Duplex Ultrasound . This is a painless, non-invasive test. It can look at the blood flow in your Carotid Artery, whether the artery is narrowed, and if so, how narrow it is. It's similar to the ultrasound scan done for expectant mothers, but this one is done on the neck.
Do risk factors also affect it?
Yes, if you have a `(Carotid Bruit)`, and at the same time have one or more risk factors for `(Carotid Artery Stenosis)`, the doctor will definitely order a test like the `(Carotid Duplex Ultrasound)` mentioned earlier. These risk factors are:
- If you have coronary artery disease .
- If you have diabetes (Type 1 or Type 2).
- If someone in the family has had a stroke before.
- If you have high blood pressure .
- If you have high cholesterol levels in your blood .
- If you are older (usually over 65 years old, or over 55 years old if there are other risk factors).
- If you have peripheral artery disease, a condition that causes narrowing of the blood vessels in your legs or arms.
- Tobacco and cigarette use .
The more of these risk factors you have, the greater your chance of developing ``Carotid Artery Stenosis''.
Also, if you are scheduled to have a heart surgery like `(Coronary Artery Bypass Grafting - CABG)` , your doctor may want to check the condition of your `(Carotid Artery)` before the surgery. This is because if you have `(Carotid Artery Stenosis)`, you are at higher risk of having a `(Stroke)` either during or after some heart surgeries. If so, you may be treated before the surgery to reduce that risk.
What is the treatment for this?
Not everyone with a `(Carotid Bruit)` will need treatment. However, some people will need treatment to reduce their risk of having a `(TIA)` or `(Stroke)`. The main goal of treatment is to improve blood flow through your `(Carotid Artery)`.
Control with medication
In most cases, especially if your carotid artery is not severely narrowed, medications are the first treatment. Depending on your condition, your doctor may recommend one or more of the following medications:
- Blood pressure medication .
- Cholesterol-lowering medication .
- Sometimes medications like aspirin, which prevent blood clotting, are used.
Lifestyle changes are very important!
Making some changes to your lifestyle can go a long way in controlling the buildup of plaque in your arteries. Be sure to try these things:
- Avoid smoking and all tobacco products completely. Tobacco is very bad for your blood vessels. It also increases your risk of many diseases, including heart disease. If you need help quitting smoking, ask your doctor, there are ways to do it.
- Eat a heart-healthy diet . This means eating less saturated fat, sodium, and sugar. Replace red meat with lean meats like chicken, turkey, and fish. Eat more vegetables, fruits, legumes, and nuts.
- Exercise regularly . Don't start too big all at once. Start small and aim for about 150 minutes of moderate-intensity exercise per week. It's a good idea to ask your doctor what's right and safe for you before starting a new exercise program.
Surgery or other procedures
If your ``Carotid Artery Stenosis'' is more severe, you may need surgery or other special procedures. Some of these include:
- `(Carotid Endarterectomy)` : This is a surgery. In this, the `(Carotid Artery)` is opened and the `(Plaque)` that has accumulated inside is removed.
- `(Carotid Angioplasty and Stenting)` : In this, a small balloon-like device is inserted into the narrowed `(Carotid Artery)` and inflated to widen the artery. Then, a small mesh tube called a `(Stent)` is placed inside the artery to prevent it from narrowing again.
But remember, not everyone with a ``Carotid Bruit'' has a blood clot and will need treatment. Talk to your doctor to find out exactly how your ``Carotid Bruit'' is affecting you.
Finally, things to remember (Take-Home Message)
If your doctor tells you that you have a ``(Carotid Bruit)``, don't panic or be afraid . It doesn't necessarily mean that you are in serious danger. It's just a sign that a doctor uses to check the health of your blood vessels.
So, talk to your doctor about this and find out more. Also, find out what your risk factors are for atherosclerosis (hardening of the arteries) and what you can do to reduce your risk. Living a healthy lifestyle is often the best way to protect yourself from these conditions. Taking care of your health is in your hands!
` carotid bruit, noise in the neck, carotid artery, stroke, TIA, atherosclerosis, blood vessel blockage, blood supply to the brain
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