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充血性心力衰竭(简称心衰)是由于心脏工作能力的减损,即使发挥代偿能力,仍不能泵出足够的血量以适应静息或活动情况下全身组织代谢需要的一种病理状态。心衰是心脏病致死的常见原因,若能及时正确地诊断与治疗,可以缓解症状,挽救生命。心脏作功的决定因素:(1)前负荷,亦称容量负荷,即指心脏收缩之前(舒张期)静脉回心血量所致的心室舒张充盈压力;(2)后负荷,亦称压力负荷,即指心脏收缩时(收缩期)面对的阻抗,决定于血压和周围血管阻力;(3)心肌收缩力;(4)心率等。
Congestive heart failure (referred to as heart failure) is due to the impairment of working capacity of the heart, even if the compensatory ability to play, still can not pump enough blood to adapt to the pathological state of systemic tissue metabolism under resting or active conditions. Heart failure is a common cause of death from heart disease, if timely and correct diagnosis and treatment, can relieve symptoms and save lives. The determinants of heart work: (1) before the load, also known as capacity load, refers to the heart before systole (diastolic venous blood back to the ventricular diastolic filling pressure; (2) after the load, also known as pressure load, That is, when the heart contraction (systolic) facing the impedance, depending on blood pressure and peripheral vascular resistance; (3) myocardial contractility; (4) heart rate and so on.