Do you feel like your blood flow is reduced in your arm? Let's talk about this (Subclavian Artery Stenosis)!

Do you sometimes feel tired, sore, or numb when you use your arm or lift something heavy? Or does one arm feel colder than the other? These could be signs that a major blood vessel supplying blood to your arm has narrowed. Today we are going to talk about one such condition, which is called `(Subclavian Artery Stenosis)`.

What is ``(Subclavian Artery Stenosis)``? Let's understand it simply!

Simply put, `(Subclavian Artery Stenosis)` is a narrowing, that is, a condition like a blockage, of a main blood vessel (we call it `(Subclavian Artery)`) that supplies blood to your arm. Imagine it as if dirt has accumulated inside a water pipe and it gradually narrows. Then the speed of the water decreases, right? That's how it is with this. Most of the time, this narrowing occurs when fatty substances (we call this `(plaque)`) are deposited inside this blood vessel. But there can be other reasons as well. It's like a `(speed bump)` on the road, which slows down the blood flow a little.

You may have heard of a condition called Peripheral Artery Disease (PAD), which causes narrowing of the blood vessels in the legs. This condition, which occurs in the blood vessels in the arm, is called Subclavian Artery Stenosis.

Many people have this condition but don't show any symptoms. That's because the rest of our body's blood vessels work amazingly well. If one blood vessel becomes blocked, the other blood vessels try to fill the gap. That is, they try to supply the blood that the arm needs somehow.

Most of the time, this `(Subclavian Artery Stenosis)` condition occurs in the artery that supplies blood to the left arm . Because, the `(Subclavian Artery)` on the left is directly divided from the `(Aorta)`, the largest blood vessel that comes from our heart. Therefore, there is a higher chance of problems with it. The one on the right comes from a different blood vessel. But very rarely, this condition can be seen in both the left and right arms.

How common is this condition?

If you look at the statistics in a country like America, usually between 2% and 7% have this condition. However, among those who already have ``Peripheral Vascular Disease'' (narrowing of blood vessels), this number is about 19%. It is also said that this condition is more common among women .

What are the symptoms of `(Subclavian Artery Stenosis)`?

As we mentioned before, not everyone will experience symptoms. But if they do, they may look like this:

• Muscle cramps when using the affected arm. Imagine that when you lift something heavy or do something with your hand, the muscles in your arm tighten and feel like they are cramping.
• Pain or stiffness in the hand when using the affected hand.
• Numbness or loss of feeling in the affected hand (we call this ``Paresthesia''). It's as if the hand is just going numb.
• Dizziness - This is a rare occurrence.
• Fainting - This is also very rare.
• Vertigo - This is a feeling of spinning around you. This is also rare.

Many people do not show symptoms because the blood supply to the arm is supplied by other blood vessels. Symptoms begin to appear after the blood vessel has narrowed by about 50% . Sometimes, a condition called ``Steal Syndrome'' can cause other symptoms. We'll talk about that later.

What are the causes of `(Subclavian Artery Stenosis)`?

The main cause of this condition is ``Atherosclerosis''. That is, fats (like cholesterol) are deposited inside the blood vessels, gradually narrowing the vessel . Just like moss grows in a water pipe. This is the most common cause.

Apart from that, there could be several other reasons:

• Vasculitis: An inflammatory condition that occurs in the blood vessels.
• Radiation: If you have had radiation treatment for something like cancer in the chest area.
• Thoracic Outlet Syndrome: Compression of the blood vessels and nerves that run from the upper chest, neck, and arm.
• (Takayasu's Arteritis): An inflammatory condition that affects the large blood vessels, especially in young women.
• Fibromuscular Dysplasia: Narrowing of blood vessels due to abnormal growth of muscle and connective tissue in the walls of blood vessels.
• Neurofibromatosis: A genetic condition that causes tumors to form in the nervous system.

What are the risk factors for this? Who should be more careful?

Some people are more likely to develop ``(Subclavian Artery Stenosis)``. See if these risk factors apply to you:

• Being between 50-60 years old.
• Having high blood pressure (Hypertension). This is what we call "high blood pressure".
• Having diabetes (Diabetes Mellitus / Diabetes). It's also called "sugar disease", right?
• Increased blood cholesterol levels.
• Eating foods high in saturated fat and trans fat (such as butter, margarine, fatty foods, fast food)
• Use of tobacco products (such as smoking, chewing betel nut).
• Sitting in one place for too long and not exercising.
• A body mass index (BMI) of more than 25 means that you are overweight for your height.
• Having peripheral artery disease (PAD).
• Having the condition (Takayasu's Arteritis).

What are the possible complications of `(Subclavian Artery Stenosis)`?

If this condition is not treated properly or is not controlled, some complications can occur.

• (Subclavian Steal Syndrome): This is a bit of a special condition. What happens here is that, because the blood flow to the arm is reduced, some of the blood going to the brain is "stealthily" drawn to the arm when working with the arm. This can cause things like dizziness, blue eyes, and decreased blood flow to the brain.
• Coronary Steal Syndrome: This is similar to the first, but here some of the blood going to the heart is diverted to the arm. This is very rare, especially in people who have had bypass surgery.
• A piece of fatty plaque that has become lodged in a blood vessel breaks off and becomes stuck in a small blood vessel near the fingers. This can cut off blood flow to the fingers, causing them to become sore and ulcerated.
• Reduced blood flow to the heart, brain, or hands.
• (TIA - Transient Ischemic Attack): This is like a mini `(stroke)`. Symptoms such as reduced blood flow to the brain for a short time, inability to speak, and loss of limbs come and go. However, this can be a precursor to a major `(stroke)`.

How do doctors diagnose this condition (Subclavian Artery Stenosis)?

If you have the symptoms mentioned above, when you see a doctor, he or she will first examine you. This is called a ``physical exam''.

• There, they will check your pulse and blood pressure .
• Maybe you're checking to see if one hand is colder than the other.
• Check to see if there are any wounds on both hands, and if they are not healing (wounds take longer to heal due to poor blood circulation).
• You can also check to see if the pulse in one arm is weak.

What's special is that, unlike a regular checkup, the doctor will measure your blood pressure in both arms . This is done to compare the `(pressure)` in both arms. If the `(systolic)` pressure (the top number) in one arm is about 10-15 millimeters `(mmHg)` higher than the other arm, it could be a sign of a condition called `(Subclavian Artery Stenosis)`. The `(pressure)` is higher in the arm that receives blood from a healthy blood vessel.

Additionally, if your doctor hears a "swoosh" sound (called a "bruit") when they listen to your blood vessels in your neck with a stethoscope, this could also be a sign of narrowing of the blood vessels.

Rarely, people who develop this condition due to other causes may also exhibit symptoms related to those related diseases.

What further tests are being done to confirm?

If your doctor suspects that you have Subclavian Artery Stenosis, he or she may first order an ultrasound. This can check the speed of blood flow and the condition of the blood vessels.

In addition, the following tests can be done to look at the blood vessels:

• (CT Angiogram - Computed Tomography Angiogram): This is a special type of CT scan. A type of dye is injected to clearly see the blood vessels.
• (MRA - Magnetic Resonance Angiogram): This is like an MRI scan, but it is specialized for looking at blood vessels.
• Traditional (Invasive) Angiogram: This involves passing a small tube through a blood vessel, injecting dye, and taking an X-ray. Sometimes a technique called ``Digital Subtraction'' is used. This removes things like bone and allows only the blood vessels to be seen clearly.

What are the treatments for `(Subclavian Artery Stenosis)`?

Treatment depends on whether or not you have symptoms and the severity of the condition.

People with symptoms may need treatment like this:

• (Aspirin): Reduces blood clotting and helps thin the blood.
• Cholesterol-lowering medicines: Reduce the amount of fat that builds up in the blood vessels.
• Medicine for high blood pressure .
• If the cause is `(Vasculitis)`, then it requires medication.
• Angioplasty: In this, a small balloon-like device is inserted into the blocked blood vessel and inflated to widen the vessel. Often, a stent (a small mesh-like device) is inserted to keep it from narrowing again.
• Bypass Surgery: This is a very rare procedure. It involves bypassing the blocked blood vessel and creating a new path using another blood vessel (possibly taken from the leg) or an artificial one.

Even if you don't have symptoms, your doctor will likely look for fatty deposits in your blood vessels (atherosclerosis). This condition can affect blood vessels anywhere in the body and can lead to a ``stroke'' or ``heart attack.'' Therefore, your doctor will likely tell you to:

• Be physically active for at least 30 minutes a day, most days of the week. (Like walking, running, exercising)
• Maintain a healthy weight for you.
• Avoid tobacco products completely.
• Eat a diet low in saturated fats and trans fats (eat more vegetables, fruits, legumes, and fiber).

Are there any complications or side effects of the treatment?

Any medication can cause minor side effects. If you experience any bothersome, persistent side effects while taking your medication, talk to your doctor.

Sometimes, surgeries or procedures like ``Angioplasty`` can cause complications like these:

• Bleeding.
• Damage to a blood vessel.
• Blood clots.
• The inserted stent did not expand properly or was not in the correct position.
• The inserted stent ruptures.
• The blood vessel is blocked again.
• Rarely, a stroke can occur after angioplasty or surgery.

How long does it take to recover from these treatments?

After an Angioplasty, you will need to rest for about a day. You will be able to drive and go to work within a week. However, a Bypass Surgery will take longer to recover. Your doctor will tell you more about this depending on your condition.

What happens if I have `(Subclavian Artery Stenosis)`? What is the future?

If you have symptoms, treatment can go a long way in opening up your blood vessels and relieving your symptoms. If you don't have symptoms, treatment may not be necessary.

But whether you have symptoms or not, Subclavian Artery Stenosis is a warning sign from your body . Most often, it is caused by Atherosclerosis (fatty deposits in the blood vessels). If one blood vessel is blocked, it can also affect other blood vessels. That's why your doctor will tell you to control your risk factors for cardiovascular disease .

This includes:

• If you use tobacco, stop it completely.
• Controlling high blood pressure.
• Controlling high cholesterol.
• Controlling or preventing diabetes.

Angioplasty is more than 95% effective in relieving symptoms. Five years after angioplasty, about 90% of the previously blocked blood vessels remain open. Open surgery can provide even more lasting results.

If your blood vessel is completely blocked, the results may be a little less effective.

Can Subclavian Artery Stenosis be prevented?

Yes, the fatty deposits in the blood vessels that cause this can often be prevented (atherosclerosis). All you need to do is make some changes to your lifestyle.

• Being physically active.
• Following a healthy diet (less oil, sugar, salt, more vegetables and fruits)
• Avoid smoking.
• Maintaining a healthy weight.

It is also important to properly manage any medical conditions you may already have, such as:

• High cholesterol.
• High blood pressure (Hypertension).
• Diabetes.

How do I take care of myself?

The few lifestyle changes you can make to prevent Subclavian Artery Stenosis will help you even after treatment. Healthy habits can help prevent this condition from recurring. If a doctor puts a stent in your artery, you will likely need to continue taking medications like aspirin and clopidogrel to keep it from closing again.

When should I see the doctor?

After treatment, you will be asked to see your doctor about every six months for the first two years. Then about once a year. This may vary depending on your condition and the place where you are being treated. So, follow your doctor's instructions exactly.

When should I go to an Emergency Treatment Unit (ETU) ?

People with Subclavian Artery Stenosis may also have fatty deposits in other blood vessels in the body. This includes the arteries that supply blood to your heart (the coronary arteries). If these arteries become blocked, you could have a heart attack. If you have symptoms of a heart attack , seek medical help immediately.

Symptoms of a heart attack may include:

• Chest pain or tightness (this pain may radiate to the arm, neck, or jaw).
• Difficulty breathing.
• Dizziness, feeling light-headed.
• Feeling like your heart is beating fast.
• Stomach upset, nausea, vomiting.

What questions should I ask my doctor?

When you see your doctor, you can ask questions like these:

• Do I need treatment?
• What is the best treatment for my condition?
• How many of these types of treatments do you perform at your hospital/clinic per year?
• Can you refer me to someone who can help me develop heart-healthy habits? (e.g., a nutritionist)

Is `(Subclavian Artery Stenosis)` dangerous?

Yes, this can be dangerous, especially if it causes a condition called ``Steal Syndrome'', which means that less blood is being pumped to the brain or heart, and instead it is being diverted to the arms. The best thing you can do to prevent these problems is to follow your doctor's advice on a healthy diet and exercise routine.

When you find out you have Subclavian Artery Stenosis, it may be the first time you've heard about that blood vessel. But, consider this a message from your body: You have Atherosclerosis. If it's in one blood vessel, it can also be in the other. So, take steps now to keep your heart and blood vessels healthy.

Finally, take-home message

Okay, so now you have a better understanding of what we've been talking about, ``(Subclavian Artery Stenosis)``. Don't worry , if it's detected early and managed properly, you can be fine.

The important thing is that this is often related to our lifestyle. That means eating a healthy diet, exercising regularly , avoiding smoking, and controlling conditions like diabetes, high blood pressure, and cholesterol .

• If you frequently experience pain, numbness, or fatigue in your hands, do not ignore it and seek medical advice.
• Follow the doctor's treatment and instructions exactly.
• This is not just a hand problem, but a sign that you need to pay attention to your overall heart health.

Listen to your body and try to stay healthy!

` Subclavian Artery Stenosis, Arm Pain, Arm Numbness, Narrowing of Blood Vessels, Angioplasty, Stent, Atherosclerosis