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BNP, or B-type natriuretic peptide,is a blood test that helps determine if someone is suffering from Congestive Heart Failure, and if so, how advanced it is. BNP is released by the left ventricle in the heart, which is the most muscular part of the heart that pumps blood to the rest of the body. A small amount of BNP is normal for anyone, but a high level of it suggests that the heart muscle is weakened and stretched. This can be a sign of congestive heart failure. Usually the higher the level of BNP, the more difficult it is for the heart to meet the body's demands.

This test is often done if a patient is showing signs of congestive heart failure, such as shortness of breath when lying flat or walking, swelling in the legs or body, abnormal heart sounds, or fluid in the lungs.

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12y ago

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