ANALYSIS OF ECG BY MEANS OF ELECTROCHEMICAL MODEL

Abstract

A trial was made to determine the origins of QRS-complex and T wave by use of electrochemical models after the Yamagiwa-Lillie's nerve model on which both depolarization and repolarization phases were visually observed.The following results were obtained.1) When a linear core is placed in the impartial field and excited, the flexion caused by the depolarization wave depends not only on the position of differential electrode but the stimulating point. When the only limited point near the electrode is excited, it becomes the sink of current and changes to source before the impulse passes halfway. Here, the exchanging point between sink and source in this field is situated near the differential electrode rather than the center. On the other hand, when a volume core making a difference between right and left side is placed in the impartial field and excited, it rather complicates to determine the changing point from sink to source. However, in general, the larger volume plays the important role for the differential electrode, and the exchanging point between sink and source removes to the side of the larger volume rather than the center.2) The reason that SV1 and RV5 in the chest lead are larger, depends upon the above two things, namely, propagating direction and volume difference.3) As we can easily make the direction of repolarization wave change in the electrochemical model, the two flexions in the same direction are recorded by means of a model made of two cores with different recovery times.4) We can express a wave form of a bipolar lead geometrically from each unipolar lead. This geometrical calculation shows that a constructed curve is varied by each excitation and conduction time of the monophasic wave led from the unipolar lead.