... small increase in TPT when more and morelongitudinal channels were inserted. In contrast, whenthere were many transverse channels (e.g., 100), insertingmore and more longitudinal channels ... E10 and F10,F1 and G1, G10 and H10, H1 and I1, I10 and J10. Assum-ing that each gj-channel has a conductance of 100 pS,these channels corresponded to a shunt resistance acrosseach junction ... excita-tion to the other cells of the chain. In summary, we have determined the effect of insertingtransverse gj-channels on transverse propagation velocity,using an expanded model (10 × 10) of cardiac...