Effect of EA pretreatment on ischemic arrythmias in the isolated heart subjected to SGIR. Panel A: Representative traces of ECG showing the cardiac arrhythmias in the rats of different groups. Panel B: Statistical results of arrhythmic scores evaluating the cardiac arrhythmias recorded 10 minutes after reperfusion in the different groups. NC = normal control group; SGIR = simulative global ischemia & reperfusion group; EA = electro-acupuncture group; EAG = electro-acupuncture plus 18-beta-glycyrrhetinic acid group. *P < 0.05 vs. control group; #P < 0.05 as compared with SGIR group; +P < 0.05 in comparison with EA group. (n = 10).