N-terminal brain natriuretic peptide precursor is a laboratory test that is an important clinical indicator and diagnostic basis for heart failure, and can also be used to monitor the efficacy of heart failure treatment. In the diagnosis of acute heart failure, a value of 900 pg/ml is considered as heart failure. When a patient has heart failure, it will produce a self-protective response, which leads to an increase of N-terminal brain natriuretic peptide precursor to achieve diuresis and reduce the heart load, and the value of N-terminal brain natriuretic peptide precursor test is proportional to the degree of heart failure. When patients with heart failure are actively treated and the condition of heart failure improves, the corresponding N-terminal brain natriuretic peptide precursor test value will gradually decrease, which is often used in clinical practice to monitor the efficacy of heart failure treatment.