Fig. 2

Results of electrophysiology tests performed 2 weeks after surgery. a Representative electrophysiology traces (surface electrocardiogram and intracavitary electrocardiography) showing S1S2 stimulation to determine the ventricular effective refractory period (VERP). Screen speed: 50 mm/s. b Representative electrophysiology trace demonstrating ventricular fibrillation induced by burst stimulation. c QRS duration. d QT interval. e VERP. f VERP dispersion. g Ventricular tachycardia or ventricular fibrillation (VT/VF) induction rate. h VT/VF fatality rate. c – f Data are shown as means ± standard deviations (n = 10/group, except n = 9 in the AG490 group). **P < 0.01 vs. Sham group; ##P < 0.01 vs. CME group (one-way ANOVA with LSD post hoc test). g-h, Data are shown as percentage, **P < 0.01 vs. Sham group; ##P < 0.01 vs. CME group (Chi-square test)