BNP stands for serum brain natriuretic peptide, and is the most widely used biomarker in the diagnosis and treatment of heart failure today.BNP is a quick and easy test that can be performed as soon as possible after blood is collected from a vein. BNP is a peptide hormone synthesized by the heart when the ventricular wall is dilated or stretched. BNP is a peptide hormone synthesized by the heart when the ventricular wall is dilated or stretched, and its physiological functions include vasodilatation, lowering of blood pressure, and diuresis and diuresis, etc. BNP has a high sensitivity in the diagnosis of heart failure, and its diagnostic value is higher in acute than chronic heart failure. As a quantitative marker of heart failure, BNP reflects not only left ventricular systolic dysfunction, but also left ventricular diastolic dysfunction, valvular dysfunction and right ventricular dysfunction. It should be noted that BNP is affected by other factors, such as advanced age and renal insufficiency, and should be further differentiated with clinical data.