BNP (B-type natriuretic peptide) is a hormone produced by the heart that helps regulate blood pressure and fluid balance in the body. A BNP blood test measures the amount of this hormone in the blood and can be used to diagnose and evaluate the severity of heart failure. High levels of BNP in the blood can indicate that the heart is not pumping efficiently and is under strain, while low levels may suggest that the heart is functioning properly. The test is often used in combination with other tests, such as an electrocardiogram (ECG) or echocardiogram, to diagnose and monitor heart failure.
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