早期诊断无症状性左室功能不全,并早期给予药物治疗,对心功能不全患者的预后具有重要的意义。心钠素(ANP)以羧基端肽(C-ANP)和氨基端肽(N-ANP)两种形式释放到血循环中,N-ANP的血浆清除率比C-ANP低,因此,N-ANP在血循环中有较高的浓度。现已公认,有症状性充血性心力衰竭患者血循环中C-ANP浓度增高。本研究 Early diagnosis of asymptomatic left ventricular dysfunction, and early drug treatment, the prognosis of patients with cardiac insufficiency is of great significance. Atrial natriuretic peptide (ANP) is released into the blood circulation in both forms of C-ANP and N-ANP. The plasma clearance of N-ANP is lower than that of C-ANP. Therefore, N-ANP In the blood circulation has a higher concentration. It is now recognized that patients with symptomatic congestive heart failure in the circulating C-ANP concentration increased. this research