Figure 2. Comparison of serum LDH and CK levels among five groups. ^aP < 0.05 compared with sham- operated group; ^bP < 0.05 compared with control I/R group; ^cP < 0.05 compared with 2.5 mg/kg As-IV group; ^dP < 0.05 compared with 5 mg/kg As-IV group. As-IV, astragaloside IV; I/R, ischemia-reperfusion; LDH, lactate dehydrogenase; CK, creatine kinase.