Figure 4

Propagation of cardiac APs in the 5 × 5 model when cell C1 was stimulated. R_ol2 = 1.0 MΩ. (When R_ol2 was at the standard value of 100 KΩ, failure occurred at the border between chains D and E.) All other parameters were at standard values. A–E: V recording from only one chain at a time: A-chain (A), B-chain (B), C-chain (C), D-Chain (D), and E-chain (E). F: V recording simultaneously from all 5 chains. Transverse propagation occurred nearly simultaneously from the C-chain to the B and D chains, followed by excitation of the E and A chains.