LCT and myocardial ischemia: With 120-min reperfusion after 30-min myocardial ischemia, the serum activities of CK, LDH, and MDA increased obviously in model group (P<0.01) while inactivated Lac groups showed significant reduction in serum CK (Figure 3A), LDH (Figure 3B), and MDA (Figure 3C) activities.