Which laboratory result would indicate a problem with heart failure aside from BNP levels?

Elevated creatinine levels can indicate issues with kidney function, which is often affected in patients with heart failure. When the heart is unable to pump effectively, it can lead to decreased perfusion of the kidneys, resulting in impaired kidney function and consequently, elevated creatinine levels. This is significant in the context of heart failure because it suggests that the condition is causing systemic effects, including renal impairment.

In heart failure, the kidneys may retain fluid due to changes in hemodynamics and hormonal signaling, which can worsen the heart's ability to function. Monitoring creatinine levels alongside BNP can provide valuable insight into the severity of heart failure and its impact on renal health.

Other laboratory results such as increased ANC, low sodium, or abnormal ECGs might be associated with heart failure, but elevated creatinine is particularly indicative of renal compromise often secondary to heart failure.