Objective To investigate the clinical indications of the fluctuation of CNP,ET and NO in blood of old male patients with coronary heart disease(CHD).

• 目的:检测老年男性冠心病患者血浆C型利钠肽(CNP)、内皮素(ET)和血清一氧化氮(NO)的含量变化,探讨其临床意义。