While labs may have slightly different "normal" ranges, here is a general guide for interpreting results: BNP: An important cardiac test - Harvard Health
Results are typically measured in picograms per milliliter (pg/mL). Generally, lower levels are better, and higher levels indicate greater heart stress. test bnp
Understanding the BNP Test: A Key Diagnostic Tool for Heart Failure While labs may have slightly different "normal" ranges,
When the heart is struggling to pump blood efficiently—a condition known as —it releases higher amounts of BNP and its inactive counterpart, N-terminal pro-BNP (NT-proBNP), into the bloodstream. The test measures the active hormone (BNP), which works to maintain cardiovascular homeostasis by relaxing blood vessels and promoting sodium excretion to reduce fluid overload. Why is a BNP Test Ordered? Doctors order this test to: The test measures the active hormone (BNP), which
| Outcome | BNP Threshold | |---------|----------------| | Increased 30-day mortality in acute HF | > 1000 pg/mL | | High risk of rehospitalization | > 500 pg/mL (discharge level) | | Optimal response to therapy | ≥ 30% decrease from baseline |
In some cases of acute heart failure (symptoms that happened very suddenly), BNP levels might still appear normal if tested immediately, as it takes time for the protein to be released.
| Finding | Possible Cause | Action | |---------|----------------|--------| | Low BNP but clinical HF | Obesity, HF with preserved ejection fraction (HFpEF), flash pulmonary edema | Consider echo, NT-proBNP may be more reliable | | High BNP but no HF | Renal failure, AF, pulmonary hypertension, age >75, sepsis | Evaluate renal function; repeat after stabilization | | Discordant BNP/NT-proBNP | Recent Entresto use (↑BNP, ↓NT-proBNP) | Use NT-proBNP for monitoring |