Your doctor will call them B-type natriuretic peptide (BNP) and N-terminal-pro-BNP (NT-pro-BNP). Levels of both in your blood go up when your heart failure gets worse and go down when it gets better. A test called a BNP blood test measures those two important levels. It’s able to spot heart failure more than 80% of the time.

(NT-proBNP) test gives your provider essential information about your heart health. It helps them diagnose heart failure, so they can develop a treatment plan.

normal range for NT-proBNP is lower than 125 pg/mL for adults younger than 75 years and lower than 450 pg/mL for adults 75 years or older.

The N-terminal pro-B-type natriuretic peptide (NT-proBNP) test is a blood test used to assess the level of NT-proBNP, a biomarker released by the heart in response to cardiac stress or strain. Here's how to interpret the results of an NT-proBNP test: Normal Range: The normal range for NT-proBNP levels can vary depending on factors such as age, sex, and the specific assay method used for testing. Generally, normal NT-proBNP levels are lower in healthy individuals and increase with age. Interpretation: Elevated Levels: Elevated NT-proBNP levels are commonly seen in conditions associated with cardiac stress or dysfunction, such as heart failure, myocardial infarction (heart attack), atrial fibrillation, valvular heart disease, and pulmonary hypertension. The degree of elevation in NT-proBNP levels may correlate with the severity of cardiac dysfunction and prognosis in patients with heart failure. Low Levels: Low NT-proBNP levels are less common and may be seen in individuals with no significant cardiac pathology. However, low NT-proBNP levels may also be observed in obese individuals, as well as in patients with severely reduced renal function or in those on hemodialysis. Clinical Correlation: Interpretation of NT-proBNP test results should be done in conjunction with clinical assessment, including consideration of the patient's medical history, symptoms, physical examination findings, and other diagnostic tests (e.g., echocardiography, electrocardiography). NT-proBNP levels can help in the diagnosis, risk stratification, and management of patients with suspected or known cardiovascular disease. Diagnostic Utility: NT-proBNP testing is particularly useful in the diagnosis and management of heart failure, where elevated levels can support the diagnosis, aid in risk stratification, guide treatment decisions, and monitor response to therapy. In acute settings such as the emergency department, elevated NT-proBNP levels can help differentiate between cardiac and non-cardiac causes of dyspnea, facilitating timely diagnosis and treatment. Prognostic Value: Elevated NT-proBNP levels are associated with an increased risk of adverse cardiovascular events, including hospitalization for heart failure, cardiovascular mortality, and all-cause mortality. Serial monitoring of NT-proBNP levels over time can provide valuable prognostic information and help guide clinical management in patients with heart failure or other cardiovascular conditions.

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