the spike potentials of the sinoatrial node , atria and the bundle of his recorded on the disp curves coincide exactly in time with spike potentials on intracardiac ecg recorded by microcatheterization of the heart through the subclavian vein , which makes it possible to distinguish on the disp curve reference points for determining conductivity on definite areas of the heart conduction system .
C0006382
bundle of his
C0018787
heart