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心脏的主要功能是搏出血液,推动血液循环,通常以心脏工作性能(Cardiac perfor-mance)或心脏泵血功能(Cardiac pump fun-ction)来表示。影响心脏工作性能的因素有前负荷、后负荷、心脏收缩性和心率的变化等
The main function of the heart is to stroke the bloodstream and promote blood circulation, usually expressed as Cardiac perfor-mance or Cardiac pump func- tion. Affect the performance of the heart of the factors before the load, afterload, cardiac contractility and heart rate changes