OVERVIEW
This test is about natriuretic peptides. Natriuretic peptides are substances made by the heart. Two main
types of these substances are:
- Brain natriuretic peptide (BNP)
- N-terminal prob-type natriuretic peptide (NT-proBNP).
Normally, only small levels of BNP and NT-proBNP are found in the bloodstream. High levels mean that
the heart is not pumping as much blood as the body needs.
WHAT DOES THE TEST MEASURES?
Natriuretic peptide tests measure the levels of BNP or NT-proBNP in the blood. The health care provider
may order a BNP test or an NT-proBNP test, but not both. They are both useful in diagnosing heart
failure, but measurements are different.
FREQUENTLY ASKED QUESTIONS:
How is this test performed?
This test is performed on a blood sample. The blood is obtained from the vein and this is performed by a
health care providers in the following way.
- clean the skin
- put an elastic band above the area
- insert a needle into a vein (usually in the arm inside of the elbow or on the back of the hand)
- pull the blood sample into a vial or syringe
- take off the elastic band and remove the needle from the vein
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What are the risks associated with this test?
There is no significant risk associated with this test. A small bruise or mild soreness around the blood
test site is common and can last for a few days. Get medical care if the discomfort gets worse or lasts
longer.
Why is the natriuretic peptide test done?
A BNP test or an NT-proBNP test is performed if symptoms of heart failure are present. These include:
- Difficulty in breathing
- Coughing or wheezing
- Fatigue
- Swelling in abdomen, legs, or feet
- Loss of appetite or nausea
Is there any preparation required before the test?
No preparation required before this test.
INTERPRETATION OF THE RESULT:
- Normal results indicate that signs and symptoms are likely due to something other than heart
failure.
- Higher than normal results suggest that some degree of heart failure is present.
WHY GET TESTED?
A BNP test or an NT-proBNP test is most often used
- To diagnose or rule out heart failure.
- If a patient has already been diagnosed with heart failure, the test may be used to find out the
the severity of the condition and to plan the treatment.
