Table A2.

Mathematical models for different regions of intact SAN

Cell Type	Primary Source	Rgap, Ωcm2	Citations
Atrial	Courtemanche et al. (7)*	1.5	(7)
			(1)
SAN	Kharche et al. (11)#	Eq. 1	(23)
Inexcitable cell	Morita et al. (36)†	4,000	(36)
			(21)

Model equations for human atrial cell model are found in original publication (7).

^*Modified to produce shorter AP.

^#Conductances of select channels scaled from central to periphery according to Eqs. 2–4.

^†E_leak = −40 mV. R_gap, gap junction resistance; SAN, sinoatrial node.