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B-type Natriuretic Peptide (BNP)

Published: July 27, 2026Updated: August 25, 2026

BNP is a hormone released by the heart in response to changes in pressure and volume, making it a valuable diagnostic tool for heart failure.

Quick summary

BNP is a biomarker used to diagnose and assess the severity of heart failure.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
pg/mL
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Abbott i-STAT BNP
interpretation: {"text":"BNP levels above 100 pg/mL may indicate heart failure or other cardiac conditions.","label":"Elevated BNP"}; {"text":"BNP levels within the 0–100 pg/mL range suggest a lower likelihood of heart failure.","label":"Normal BNP"}

B-type Natriuretic Peptide (BNP) is a hormone produced by the heart ventricles in response to increased pressure and volume. It plays a crucial role in regulating blood pressure, fluid balance, and cardiac function.

Measuring BNP levels in the blood can help diagnose heart failure, assess its severity, and monitor the effectiveness of treatment. Elevated levels typically indicate heart dysfunction or failure.

The reference range for BNP is 0–100 pg/mL. Levels above this range may suggest heart failure, while levels within the range make heart failure less likely.

Frequently asked questions

What is the normal range for BNP?
The normal range for BNP is 0–100 pg/mL.
What does a high BNP level mean?
A high BNP level typically indicates heart failure or other cardiac conditions requiring further evaluation.
  1. 1
    BNP TestSource
  2. 2
    B-type Natriuretic PeptideSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy