Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of B-type natriuretic peptide
Medically reviewed by Min Clinic Staff | Updated: January 2026
B-type natriuretic peptide: A 32-amino-acid polypeptide secreted by the ventricles of the heart in response to excessive stretching of heart muscle cells. The levels of B-type natriuretic peptide are elevated in patients with congestive heart failure, and correlate with both the severity of symptoms and the prognosis. Also known as BNP.