Figure 1

(a) Action potentials recorded during steady pacing at 500 ms intervals for different values of gKmax. (b) Action potential duration restitution and (c) conduction velocity restitution for different values of diastolic interval measured with a premature stimulus during steady pacing at 500 ms intervals. All measurements obtained from a narrow strip of virtual tissue 10 mm long and with uniform gKmax of 0.001, 0.002, 0.003, and 0.004 mS mm^-2 as indicated.