During heart failure, the heart makes two proteins, called B-type natriuretic peptide (BNP) and N-terminal-pro-BNP (NT-proBNP). Levels of both in the blood go up when heart failure gets worse and go down when it gets better.
NT-proBNP Rapid Quantitative Test (Chemiluminescence Immunoassay) is used for in vitro quantitative detection of the N-terminal pro-B-type natriuretic peptide（NT-proBNP） concentration in human serum, plasma that contains heparin /EDTA and other anticoagulants and venous whole blood samples, mainly used for auxiliary diagnosis of cardiac diseases.
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