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Cardiac Markers

B-type Natriuretic Peptide (BNP)

Normal range < 100 (heart failure unlikely) pg/mL (< 100 ng/L SI). Specimen: Plasma (EDTA).

Also known as: brain natriuretic peptide.

< 100 (heart failure unlikely) pg/mLReference range

Reference range

This result is reported qualitatively or as a one-sided threshold rather than a two-sided numeric band.

SpecimenPlasma (EDTA)
Conventional range< 100 (heart failure unlikely) pg/mL
SI range< 100 ng/L
Conversion factor×1 (conventional → SI)
PanelCardiac Markers

Convert any B-type Natriuretic Peptide (BNP) result between units on the unit converter.

What is the normal range for B-type Natriuretic Peptide (BNP)?

The standard teaching reference range for B-type Natriuretic Peptide (BNP) is < 100 (heart failure unlikely) pg/mL in conventional units, or < 100 ng/L in SI units. This value is measured in plasma (edta).

Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population — always use the range printed on the actual result.

Above the range

Common causes of a high B-type Natriuretic Peptide (BNP)

  • Heart failure (higher = more severe)
  • Renal failure
  • Older age
  • Pulmonary hypertension / PE

Below the range

Common causes of a low B-type Natriuretic Peptide (BNP)

  • Obesity (lowers BNP)

At the bedside

Nursing considerations

  • Helps distinguish cardiac from pulmonary causes of dyspnea.
  • Trend it to gauge response to heart-failure therapy.

Study aid

Your notes on B-type Natriuretic Peptide (BNP)

Same panel

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