Figure 3 Parecoxib sodium relieved oxidative stress induced by myocardial I/R injury. (A) Percentage of ROS+ cells in myocardial tissues. The proportion of ROS+ cells was higher in the I/R group than that in the Sham group and I/R+Pare group (P<0.05). (B) Difference in MDA protein concentration in myocardial tissues. Compared with that in the I/R group, MDA protein concentration were clearly lower in the Sham group and I/R+Pare group (P<0.01). (* P<0.05 vs. I/R group, ** P<0.01 vs. I/R group).