n Normal value

Aug 24, 2022 Source: Cainiu Health

Dr. Li Man

Introduction

The normal value for N-terminal pro-B-type natriuretic peptide (NT-proBNP) is <125 ng/L. In patients with acute heart failure, NT-proBNP levels are typically near 300 ng/L, while an NT-proBNP level <125 ng/L helps exclude chronic heart failure.

Not all diseases cause elevated N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels. In addition to heart failure, renal failure and severe respiratory diseases can also lead to increased NT-proBNP.

Normal NT-proBNP Values

The normal reference value for N-terminal pro-B-type natriuretic peptide (NT-proBNP) is <125 ng/L. NT-proBNP is the abbreviated term for N-terminal pro-B-type natriuretic peptide. In patients with acute heart failure, NT-proBNP levels typically approach 300 ng/L; thus, an NT-proBNP level <300 ng/L effectively rules out acute heart failure, while an NT-proBNP level <125 ng/L excludes chronic heart failure.

In patients with acute heart failure, NT-proBNP levels should be interpreted with consideration of age and renal function. Specifically, the diagnostic thresholds are as follows: >450 ng/L for patients over 50 years old; >900 ng/L for patients over 50 years old with renal impairment; and >1800 ng/L for patients over 75 years old. NT-proBNP may also be elevated in conditions such as acute coronary syndrome, atrial fibrillation, diabetic vasculopathy, diabetic nephropathy, and renal insufficiency. BNP (B-type natriuretic peptide) is a peptide hormone synthesized by cardiac myocytes; during its biosynthetic processing, part of the prohormone is cleaved to yield NT-proBNP.

Notably, NT-proBNP levels rise significantly in the presence of severe sodium and water retention; prompt, targeted management is therefore essential. We hope this information is helpful to you!

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