A BUN level greater than which value indicates moderate heart failure?

A BUN level greater than which value indicates moderate heart failure?

• A. Greater than 900 pg/mL
• B. Greater than 300 pg/mL
• C. Greater than 600 pg/mL
• D. Greater than 100 pg/mL

Answer: (C)

Natriuretic peptide levels rise as the heart’s ventricles stretch from volume and pressure overload, so higher levels indicate greater heart-failure severity. In this context, a BNP level around six hundred picograms per milliliter typically corresponds to at least moderate heart failure, since smaller elevations can occur with milder disease or other conditions, while much higher values suggest more severe decompensation. Note that BNP is measured in pg/mL; BUN is a kidney function test and isn’t used to stage heart failure, so if a question mentions BUN, it’s likely referring to BNP. Age, renal function, and body habitus can affect BNP interpretation, so consider the whole clinical picture.

Natriuretic peptide levels rise as the heart’s ventricles stretch from volume and pressure overload, so higher levels indicate greater heart-failure severity. In this context, a BNP level around six hundred picograms per milliliter typically corresponds to at least moderate heart failure, since smaller elevations can occur with milder disease or other conditions, while much higher values suggest more severe decompensation. Note that BNP is measured in pg/mL; BUN is a kidney function test and isn’t used to stage heart failure, so if a question mentions BUN, it’s likely referring to BNP. Age, renal function, and body habitus can affect BNP interpretation, so consider the whole clinical picture.