心臓ペースメーカ電極に関する基礎的検討

抄録

It is indispensable in the design of pacemaker electrodes to get clear understandings about such properties of stimulating electrodes such as electrode impedance and stimulation threshold. On the basis of the experiments with dog's heart, a simple model of heart muscle and stimulating electrodes was derived, on which a theoretical analysis was made for the electrode impedance, the voltage, current and power thresholds. Experimental results obtained in dogs agree well with the theoretical results. It is concluded that a cathode has an optimum dimension and a larger anode is desirable from the viewpoint of the power threshold. The theory is regarded as a general analysis of the stimulation of living bodies, and the results is applicable to the design of various sorts of electrical stimu lators for biological use.