Table 4.

Ionic currents responsible for a high amplitude, short duration J_spon-induced EAD upstroke. Three calculations of the average rate of change of membrane ionic currents, İ_i (μA/(cm² × s) ), over a 20 ms interval: immediately before the EAD upstroke (İ_i,EAD), during the same phase of repolarization of an AP without an EAD (İ_{i, noEAD}), and the difference between the first two cases (İ_i,EAD − İ_{i, noEAD}).

	İNa	İCa,L	İKr	İKs	İNaCaX	İns,Ca	İp(Ca)	İV
İi,EAD	0.0	13.2	−8.1	−10.6	−19.5	−43.6	2.6	30.9
İi, noEAD	0.0	12.9	−10.5	−13.7	−8.8	−18.6	−1.1	44.5
İi,EAD − İi, noEAD	0.0	0.3	2.5	3.1	−10.8	−25.0	3.7	−13.6