How to read a BNP result
Other platforms explain it with text and video. In VMS you practice it on the patient.
BNP and NT-proBNP are released when the heart walls are stretched. They help tell heart failure apart from other causes of breathlessness.
Step by step
Know which test you have
BNP and NT-proBNP are different tests with different numbers. Never compare one with the other. [1]
Use the rule-out cut-offs
In sudden breathlessness, BNP below 100 pg/mL or NT-proBNP below 300 pg/mL makes heart failure unlikely. [2]
Adjust NT-proBNP for age
Rule-in cut-offs rise with age: about 450 under 50, 900 from 50 to 75 and 1800 pg/mL over 75. [2]
Think of other causes
Kidney disease, older age, atrial fibrillation, pulmonary embolism, sepsis and lung disease can also raise the level. [2]
Watch for falsely low values
Obesity lowers these peptides. A normal level in a patient with obesity does not fully exclude heart failure. [2]
Check for sacubitril-valsartan
This drug raises BNP but not NT-proBNP. Use NT-proBNP to follow patients who take it. [3]
Link to the patient
Combine the result with the exam, chest X-ray and echocardiogram. [1]
Common errors
- Comparing BNP numbers with NT-proBNP numbers.
- Ignoring kidney function and age.
- Ruling out heart failure from a normal level in obesity.
Typical cut-offs in sudden breathlessness; use your lab's ranges [2]
| Test | Heart failure unlikely | Heart failure likely |
|---|---|---|
| BNP | below 100 pg/mL | above 400 pg/mL |
| NT-proBNP, under 50 years | below 300 pg/mL | above 450 pg/mL |
| NT-proBNP, 50 to 75 years | below 300 pg/mL | above 900 pg/mL |
| NT-proBNP, over 75 years | below 300 pg/mL | above 1800 pg/mL |
Practice it in VMS
In VMS you do this on the patient, not on paper: every step goes on the checklist with a score, and in Teach mode Blocky tells you what comes next.
VMS cases that train this skill
Sources
- AAMC Core Entrustable Professional Activities (Core EPAs)
- NCCPA PANCE Content Blueprint
- Open RN, Nursing Pharmacology 2e (CC BY 4.0)
Facts and steps follow AAMC Core Entrustable Professional Activities (Core EPAs); NCCPA PANCE Content Blueprint. VMS is not affiliated with these organizations. Updated: 2026-10-11.