What Is BNP in a Blood Test?
BNP is a hormone released by the heart when it is under strain or failing.
Normal Range
- Below 100 pg/mL: heart failure unlikely
- 100–400: possible heart failure
- Above 400: heart failure likely
High BNP Causes
- Heart failure (most common)
- Heart attack
- Kidney disease
- Pulmonary hypertension
- Age (levels rise naturally)
Clinical Use
- Diagnosing heart failure with shortness of breath
- Monitoring treatment effectiveness
- Interpret with echocardiogram and symptoms
Source: NLM MedlinePlus, American Association for Clinical Chemistry.
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