NT-proBNP measurement is specifically used in patients undergoing which therapy?

NT-proBNP measurement is specifically used in patients undergoing which therapy?

• A. Risk assessment for coronary heart disease
• B. Risk assessment for angina
• C. Nesiritide therapy
• D. Vitamin B therapy

Answer: (C)

NT-proBNP measures the heart’s own response to wall stress. In acute heart failure, therapy with nesiritide introduces a BNP analog to help unload the heart. Because nesiritide is an external BNP peptide, using BNP levels to monitor therapy would be muddled by the treatment itself. NT-proBNP, on the other hand, is a separate fragment that still reflects endogenous myocardial stress and ventricular stretch, so it provides a clearer gauge of how well the heart is responding to therapy. As nesiritide lowers filling pressures and reduces stress, NT-proBNP levels would be expected to fall if the treatment is effective, making this marker particularly useful in patients receiving nesiritide. Other options relate to risk assessment for coronary disease or angina or to unrelated therapies, and they don’t specifically involve the context where natriuretic peptide therapy is being used.

NT-proBNP measures the heart’s own response to wall stress. In acute heart failure, therapy with nesiritide introduces a BNP analog to help unload the heart. Because nesiritide is an external BNP peptide, using BNP levels to monitor therapy would be muddled by the treatment itself. NT-proBNP, on the other hand, is a separate fragment that still reflects endogenous myocardial stress and ventricular stretch, so it provides a clearer gauge of how well the heart is responding to therapy. As nesiritide lowers filling pressures and reduces stress, NT-proBNP levels would be expected to fall if the treatment is effective, making this marker particularly useful in patients receiving nesiritide. Other options relate to risk assessment for coronary disease or angina or to unrelated therapies, and they don’t specifically involve the context where natriuretic peptide therapy is being used.