心力衰竭 (心衰 )是一种多系统的疾患 ,以心脏、骨骼肌及肾功能异常为特征 ,且伴有交感神经系统刺激及神经激素改变等一系列复杂的过程。　　 心肌收缩期功能障碍非瓣膜性心衰最初的异常改变为左心室功能下降 ,使心输出量降低。而心输出量降低又可激活某些神经激素代偿机制 ,这 Heart failure (heart failure) is a multi-system disorder characterized by cardiac, skeletal and renal dysfunction and is accompanied by a series of complex processes such as sympathetic nervous system stimulation and neurohormonal changes. Myocardial systolic dysfunction The first abnormal change in non-valvular heart failure is a decrease in left ventricular function, reducing cardiac output. The reduction of cardiac output can activate certain neurohormones compensatory mechanism