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本文以 GeseLowitz 的阻抗容积技术的电场理论为依据,以蟾蜍腓肠肌为实验模型,测量记录了肌内收缩过程中相应的阻抗变化。发现肌内收缩与阻抗变化基本同时发生(配对 t 检验 P>0.05)。收缩张力改变量(ΔT)与阻抗变量(ΔZ)成正比。增加刺激强度或频率时两者变化趋势一致。此外,损伤局部肌组织可严重改变阻抗波形(X~z 检验 P<0.01)。结果提示肌组织本身的舒缩是阻抗变化的一个不客忽视的起因,其收缩状态将直接影响阻抗波形;这为心阻抗图的解释提供了新的实验证据。
In this paper, based on the field theory of GeseLowitz’s impedance volumetric technique, the toads gastrocnemius muscle is used as an experimental model, and the corresponding impedance change during intramyocardial contraction is measured. Found that intramuscular contraction and impedance changes occurred at the same time (paired t test P> 0.05). The amount of change in shrinkage tension (ΔT) is proportional to the impedance variable (ΔZ). Increase the intensity or frequency of stimulation when the trend of the two changes. In addition, the local muscular tissue damage can significantly change the impedance waveform (X ~ Z test P <0.01). The results suggest that the contraction and contraction of the muscle tissue itself is a cause of indistinct changes in impedance, and its contraction state will directly affect the impedance waveform; this provides new experimental evidence for the interpretation of the cardiac impedance graph.