Urinary natriuretic peptide is a protein compound present in the heart and brain tissue, which has a certain influence on the metabolism of water and sodium, and can play the role of water and sodium in the body, and the level of urinary natriuretic peptide is a very good guide to the judgment of diseases. When the heart function is reduced, the cardiomyocyte synthesis of urinary natriuretic peptide increases, resulting in urinary natriuretic peptide fast into the blood, in the blood check will find that urinary natriuretic peptide level is significantly higher, in the clinic, urinary natriuretic peptide test, help to determine the cardiac function condition, when the patient because of a variety of reasons, resulting in cardiac failure, the urinary natriuretic peptide level will have a significant increase, urinary natriuretic peptide level of the extent of the elevation of the level of the severity of cardiac failure is directly proportional to The level of urinary natriuretic peptide is directly proportional to the severity of heart failure, which is a good guide for the judgment of heart failure and the prognosis of treatment.