SXNI can exert cardioprotective effects by mitigating oxidative stress. (A,B,C,D,E) The levels of antioxidant enzymes (i.e., CAT, SOD and GSH-Px), GSH/GSSG ratio and MDA were measured. Data are expressed as the means ± SD from at least three independent experiments. ###, P<0.001 vs. sham group; *, P<0.05 vs. IR group; **, P<0.01 vs. IR group; ***, P<0.001 vs. IR group. SXNI, Shuxuening injection.