本文通过研究主动脉容积变化微分方程，导出了心阻抗图与心脏射血的非线性函数关系。

This paper derived a non-Linear function relationship between the cardiac impedance plethysmogram and the heart ejection by researching differential equation of the aortic volume change.

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目的探讨重建心阻抗图ao分量的阻抗变化与主动脉容积变化的关系。

Objective To investigate the relation between the ao components impedance change of the reconstructed impedance cardiogram and the volume change of aorta.

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