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动物模型实验已经证实,左心室的状态变量是喷血压力曲线和舒张压力曲线,它的输出讯号是它的状态变量在主动脉瓣开放期间的曲线段,生理研究已经证实,喷血压力的大小取决于心肌的收缩性和舒张末期容量(Frank—starling),后者的大小取决于动脉阻抗和回心血量,前者表现为相同的舒张末期容量的条件下,心肌应激机能强者,它的舒张末期压力也增高,心肌的张应力较大,用系统理论的术语来说,就是左心室的输出决定于它的输入,或者说动脉系统的输入决定于它的输出,
Animal model experiments have confirmed that the state variables of the left ventricle are the spurting pressure curve and the diastolic pressure curve, and its output signal is the curve segment of its state variable during the opening of the aortic valve. Physiological research has confirmed that the spurting pressure is Depending on the contractility and end-diastolic volume of the myocardium (Frank-starling), the size of the latter depends on the arterial impedance and the returning blood volume, the former being expressed in the same end-diastolic volume condition, the stronger the myocardial stress function, its The end-diastolic pressure also increases, and the myocardial tension is greater. In terms of system theory, the output of the left ventricle is determined by its input, or the input of the arterial system is determined by its output.