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心脏的主要功能是通过不断的收缩和舒张,以保持正常的血液循环。心功能不全,即心脏泵血功能的一种病理生理状态。如心肌收缩力因患各种疾病(如心肌局部缺血,高血压,非阻塞性心肌病变,及先天性心脏病等)而减弱,即使充分发挥代偿功能,不能将静脉回心血液充分排出,则静脉血液回流受阻,引起静脉系统淤血,而另一方面发生动脉系统供血不足,不能满足人体组织代谢需要,而出现一系列症状和体征,称为慢性心功能不全或
The main function of the heart is to maintain normal circulation through constant contraction and relaxation. Cardiac insufficiency, a pathophysiological state of cardiac pump function. If myocardial contractility due to a variety of diseases (such as myocardial ischemia, hypertension, non-obstructive cardiomyopathy, and congenital heart disease, etc.) and weakened, even if fully compensatory function, venous return to the blood can not be fully discharged , Then venous blood flow obstructed, causing venous congestion, and on the other hand arterial system insufficiency, can not meet the needs of human tissue metabolism, and a series of symptoms and signs, known as chronic heart failure or