BNP, Plasma

Diagnostic Use

B-type (brain) natriuretic peptide (BNP) is a hormone produced by cardiac myocytes in response to stretch of the cardiac wall. BNP acts on the kidneys to promote salt wasting (natriuresis) and and renal water loss (diuresis) with a subsequent decrease in the circulating plasma volume. BNP also promotes vasodilation, decreasing peripheral vascular resistance and lowering blood pressure.

Plasma BNP is most commonly used as a screening test for heart failure in a patient with dyspnoea. More specialised uses of BNP include prognostication in patients with established heart failure, and in making clinical management decisions regarding heart failure therapy.


Core Biochemistry

Delphic Registration Code



B type natriuretic peptide

Turnaround Time

3 hours

Test Code