Table 1.

Transverse Propagation Velocity (antegrade (A) and retrograde(R)) of Simulated Cardiac Action Potentials in 2-D Sheets at a R_ol2 of 500 KΩ.

Model Size		Stimulations	No. of Chains Responding	TPT ms	Transv. Velocity cm/sec
7 × 7	A	Entire A Chain	7	1.2	8.0
		Cell A1 Only	7	1.5	6.4
	R	Entire G Chain	7	1.2	8.0
		Cell G1 Only	6 (A failed)	1.5	5.4
5 × 5	A	Entire A Chain	5	1.6	4.0
		Cell A1 Only	5	1.7	3.8
	R	Entire E Chain	5	1.7	3.8
		Cell E1 Only	5	1.8	3.6
3 × 4	A	Entire A Chain	3	1.0	3.2
		Cell A1 Only	3	1.1	2.9
	R	Entire C Chain	3	1.2	2.7
		Cell C1 Only	3	1.2	2.7
2 × 3	A	Entire A Chain	2	0.7	2.3
		Cell A1 Only	2	0.8	2.0
	R	Entire B Chain	2	0.9	1.8
		Cell B1 Only	2	0.9	1.8

A = antegrade R = retrograde

Circuit Parameters: R_BT = 10 KΩ R_jc = 25 MΩ (50 MΩ/2); C_j = 16 pF; C_s = 0.2 pF

To improve the performance of the 7 × 7 model (for R_ol2 of 500 KΩ), R_jc was decreased slightly to 24.5 MΩ (49.0 MΩ/2).