What is BNP?

A BNP test measures levels of BNP in the blood. BNP is a hormone that the left ventricle of the heart produces to help regulate blood volume. The left ventricle is the part of the heart chiefly responsible for pumping oxygenated blood around the body. If a person’s heart has difficulty pumping blood, it releases more BNP than usual.

What is the cut-off point for BNP?

The cut-off point can vary by laboratory, but commonly, the healthy range is less than 100 picograms of BNP per milliliter (pg/ml) of blood. This means that a result of more than 100 pg/ml indicates the possibility of heart failure. Values can vary by age, however, so people should always discuss their results with their doctor.

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How should I prepare for a BNP test?

Most people can resume their normal activities immediately after the screening. A person does not usually need to make any preparations for a BNP test, such as fasting. However, doctors will advise individuals on any specific requirements.