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Medical Abbreviation for Brain Natriuretic Peptide

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Medical Abbreviation for Brain Natriuretic Peptide

If your doctor suspects heart failure, an inability of the heart to properly pump blood throughout the body, they may call for a BNP, which is an abbreviation for the hormone, brain natriuretic peptide. The BNP is a test that measures levels of this hormone in the bloodstream.

Though traces are always present during healthy cardiac function, elevated amounts of BNP in the blood implies insufficient pumping activity, the underlying cause of heart failure. This can also be a sign of other problems, such as hypertension (high blood pressure) and cardiac hypertrophy (enlarged heart muscles), as well as kidney problems.

Given how instrumental BNP is as part of diagnosis of heart failure, it’s important to understand what doctors mean and what they’re looking for when they call for BNP.    

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Using the BNP Medical Abbreviation

Most patients will encounter the abbreviation “BNP” when looking at or discussing the results of blood tests. You may see it in your electronic medical record or your doctor might bring it up during a consultation or appointment.

There are a lot of different kinds of information that blood tests can reveal; levels of hormones and other materials in the bloodstream may not only tell doctors about heart health, they can also give insight into liver and kidney health, as well as the presence of cancer.

If your doctor suspects heart failure—or wants to rule out this diagnosis—you’ll see BNP results in your bloodwork. When looking at your results, don’t hesitate to ask the doctor to tell you what they mean, and why they’re significant.

When BNP Is Recommended

BNP will be part of a panel of blood tests and other types of tests employed in diagnosing the presence of and tracking the progression of heart failure.

Cardiologists will call for it when they suspect this condition but want to make sure another condition isn’t causing symptoms. In addition, this test will be employed to make sure treatments for heart failure are effective in resolving the problem.   

Signs of Heart Failure

BNP is called for when you’re displaying symptoms of heart failure. These include:

  • Difficulty breathing
  • Coughing/wheezing
  • Fatigue
  • Swollen abdomen, legs, and/or feet
  • Nausea
  • Loss of appetite

What You Should Know About BNP

How It Is Done

BNP is part of a panel of blood assessing the composition of blood. A healthcare professional uses a needle to draw a small sample of blood from a vein, usually in the arm.

To ease sample collection, a band may be tied around the upper arm, and you may be asked to make a fist, causing your veins to pop out. Once enough blood is drawn into a tube, it’s sent to the lab for clinical testing.

What It Can Tell You

During heart failure, excess blood remains in the chambers of the heart, building up pressure. In response, the BNP hormone is released from the walls of these chambers, which helps dilate other vessels and arteries, easing this pressure.

BNP is also a biomarker, or measurable indicator of, cardiac hypertrophy, which is the abnormal growth of heart muscles. It often precedes and/or accompanies heart failure. Basically, over-development of this organ—leading to spikes in BNP levels—means that it’s struggling to properly circulate blood through the body.

Primarily, BNP has three purposes:

  • Detecting heart failure: This test will catch elevated BNP levels associated with heart failure when this condition is suspected.
  • Ruling out heart failure: BNP is even more effective at ruling out heart failure when patients complain of symptoms associated with the condition.
  • Tracking progress: During the course of treatment for heart failure, BNP may be used to assess progress. Generally, doctors want to see these numbers going down.

Concerns With Tests

There are always a few risks when it comes to drawing blood, including:

  • Infection
  • Bruising
  • Lightheadedness
  • Soreness 

Be sure to let your doctor know if you’re seeing swelling or redness, or feeling heat at the site of the blood draw, as those could be signs of infection.

BNP levels may also become elevated in a few other cases, which may sometimes rule out heart failure. These include:

  • Chronic kidney disease (CKD)
  • Hypertension (high blood pressure)
  • Lung disease
  • Overactive thyroid
  • Advanced liver disease
  • Elevated cortisol levels
  • Brain hemorrhage 

BNP levels are also elevated when patients take Natrecor (nesiritide), a medication that treats heart failure. Further, increasing age, being female, and exercise in healthy individuals are also linked to higher levels.

Kidney Disease and BNP

Elevated levels of BNP hormone are a consistent feature of chronic kidney disease (CKD), though there is still debate as to whether it should be used for diagnosis. Since CKD can lead to heart disease, and vice versa, it’s clear that BNP plays a major role in regulating kidney function.

Specifically, BNP acts on receptors in the kidneys to prevent the reabsorption of sodium (salt) and to promote blood circulation there. Since these elevated levels are a compensatory measure the body takes to combat CKD, this hormone may be the key to future treatments for this condition.

A Word From Verywell

Tests like BNP are part of the reason that doctors are getting better and better at taking on heart failure. Highly accurate—98% of the time, normal BNP levels correctly rule out heart failure—this test is easily applied and well-tolerated.

As knowledge about this hormone as well as its therapeutic potential grows, the outlook will continue to improve for cardiac and/or kidney disease patients. Clearly, BNP testing is another in an array of essential tools that have dramatically improved care and helped save lives.   

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