Table 1. Comparison of intact SAN parameters.

	Uniform Model	Non-uniform model	Experimental Values
CL, ms	301	234	361±38
SACT, ms	13.9	2.7*	21±11
MDP (central SAN), mV	−57.6	−62.6	−56±11
MDP (peripheral SAN), mV	−68.6	−73.7	−61±6
APD90 (central SAN), ms	142.9	115	120–150
APD90 (peripheral SAN), ms	107	98	80–120
UV (central SAN), V/s	6.1	8.4	<10
UV (peripheral SAN), V/s	13.8	60.7	10–50

*A cell near the atrium fires first, resulting in very small SACT.