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Elevated BNP levels are found in conditions besides acutely decompensated CHF. These conditions can include:
Older age
Renal failure
Severe sepsis
PE
Chronic CHF
These conditions will often produce BNP elevations in an intermediate range, but if the elevation is markedly positive, the acutely decompensated CHF is much more likely.
[adapted from ACEP speaker Matthew Strehlow, MD]