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心力衰竭的主要表现是心脏满足身体需要的前向输出量减低,在适当情况下,按照Frank—Starling机理,以增加心室舒张期容量(前负荷)或增加心肌收缩性(变力作用),可使心输出量增加。除这些中枢性或内在性机制外,重要的外周或外在性机制之存在,亦能明显影响心脏性能。例如左室排血阻力之改
The primary manifestation of heart failure is a decrease in the forward output of the heart that meets the needs of the body, where appropriate, in accordance with the Frank-Starling mechanism to increase ventricular diastolic volume (preload) or increase myocardial contractility (variable action) Increased cardiac output. In addition to these central or intrinsic mechanisms, the presence of important peripheral or extrinsic mechanisms can significantly affect heart performance. For example, left ventricular resistance changes