Let's learn about the BNP test? The story of your heart (B-Type Natriuretic Peptide Test)

Do you sometimes find it hard to breathe even when walking a short distance? Or do your legs swell and you just feel tired? If you have symptoms like these, your doctor may recommend a blood test called BNP. Many people are a little scared when they hear this name, because they don't know exactly what it is. But what is it really? What does it detect? Let's talk about all this very simply, in a way that you can understand.

What exactly is BNP?

Simply put, BNP is a protein produced by your heart. BNP stands for B-type Natriuretic Peptide. But some people also call it "Brain" Natriuretic Peptide. That's because scientists first discovered this protein in brain tissue. But it was later realized that it is mainly produced by our heart, specifically the left ventricle.

Think of it this way. Your heart is like a pump that works nonstop. Sometimes this pump has to work harder. That means the heart muscle starts to contract. At times like these, the heart releases this protein called BNP into the blood.

These BNPs can do some amazing things:

• They signal the kidneys, "There's a little too much salt and water in the body, so get rid of them with urine."
• It also tells the blood vessels to "open up a little (dilate), allowing blood to flow more easily."

Both of these processes result in a decrease in blood pressure and a decrease in the amount of blood the heart has to pump. This reduces the workload on the heart, which means it has to work harder. So BNP is like a friend who helps the heart.

However, if the BNP level in your blood is much higher than normal , it gives your doctor an important signal. That is, "Your heart is under too much strain." This condition is often seen in heart failure.

Some labs perform a similar test called NT-proBNP . Both provide similar information, but the normal ranges are different.

Why would a doctor recommend this BNP test?

There may be several reasons why your doctor may recommend this test.

• If you have symptoms of heart failure: If you have symptoms such as shortness of breath, constant fatigue, swelling of the legs and ankles, this test is very important to determine whether the cause is a heart problem or a lung problem.
• If you already have a heart condition: If you have already been diagnosed with a heart condition, this test helps assess its severity.
• Check if the treatment is working: This BNP level is also checked to see if the medication you are being given has reduced the pressure on your heart and if the treatment plan is working.
• If you are at risk: If you are at high risk for heart disease (for example, with conditions like diabetes or high blood pressure), this test may also be done to get an idea of ​​your heart health.

How is this blood test done? Is it something to be afraid of?

This is very simple. You have no reason to be afraid. This is done just like a normal blood draw.

A nurse or doctor will clean a vein in your arm, insert a small needle, and take a small amount of blood. You may feel a slight stinging sensation when the needle is inserted, but it will only last a few seconds.

After the blood is taken, a small plaster or bandage is applied to the area. The area may appear slightly bruised and blue, but this will completely disappear in a day or two. Your blood sample will then be sent to a laboratory to measure your BNP or NT-proBNP levels.

How long does it take to get the results?

This is one of the biggest advantages of this test. The results can be obtained very quickly.

If you are admitted to the Emergency Department (ETU) due to an emergency, such as difficulty breathing, you can usually get this result in as little as 15 minutes . This is a great help for doctors to make quick decisions in an emergency.

However, if you already have a heart condition and are having this test done routinely, such as to monitor the progress of your treatment, it may take a day or two for the results to come back.

How to interpret the BNP result? What is the 'Normal' level?

This is a question that many people have. Let's look at the average values ​​of these two tests in a table like this.

But keep this in mind. These values ​​are just a general guide. These 'normal' values ​​may vary slightly depending on your age, other medical conditions, and sometimes body weight (obesity). Therefore, only your doctor can accurately interpret your results. Do not rely on the internet to make your own decisions.

What does it mean if BNP level is higher than 'Normal'?

Elevated BNP levels often indicate that there is some strain on the heart. If the BNP value is greater than 100 pg/mL, it may be a sign of heart failure.

However, the reason for an elevated BNP level is not always heart failure. This level can also be elevated due to other health problems. Therefore, do not make big decisions based on this test alone.

Other reasons that can cause elevated BNP levels include:

• Chronic Kidney Disease: When the kidneys fail to function properly, BNP levels in the blood can increase because the body is unable to properly remove it.
• Other heart diseases: In addition to heart failure, BNP can also be elevated in other heart conditions.
• Lung problems: BNP levels can also increase due to conditions such as a blood clot in the lungs (pulmonary embolism) or high blood pressure in the lungs (pulmonary hypertension).

If the result is 'Abnormal', what happens next?

If your BNP level is high, your doctor will consider it just one piece of the puzzle. He or she will need to do more tests to get the full picture.

For example, your doctor may recommend tests like these:

• Electrocardiogram (EKG): Checks the electrical activity of the heart.
• Echocardiogram: A scan of the heart. This can check many things, such as the heart's pumping ability and the condition of its valves.
• Chest X-ray: An X-ray examination of the chest.

Your doctor will take all of these test results, your symptoms, and your medical history into account to come to a final conclusion. He or she will then develop a treatment plan that is best for you.

If you have any questions about the results, don't be afraid to ask your doctor. "Doctor, I was told my BNP level is high, what does that really mean?" is your right to ask.

BNP Test, Heart Failure, Heart Health, Shortness of Breath, NT-proBNP