The n-terminal natriuretic peptide precursor, in clinical practice, is mainly the N-terminal B-type natriuretic peptide precursor, abbreviated as NT-proBNP. Due to the different ages of the population, the range of normal values also varies, for example, for people under 50 years of age, the normal value of NT-pro BNP should be greater than 450 ng/ml. For example, for people under 50 years old, the normal value of NT-proBNP should be more than 450 ng/ml, for people between 50 and 75 years old, the normal value of NT-proBNP should be more than 900 ng/ml, and for people over 75 years old, the normal value of NT-proBNP should be more than 1800 ng/ml. In addition, if one has renal insufficiency, such as glomerular filtration rate <60 ml/min, then the normal value of NT-pro BNP should be greater than 1200 ng/ml. In conclusion, if you find that the value of this item does not belong to the normal value in the examination, you should seek professional help as soon as possible to clarify the reasons and actively intervene, so as to avoid serious consequences and jeopardize your own health.