SOD1 and myocardial ischemia: Studies [11] on the rats further confirmed that Xinmailong Injection can correct the J-point displacement on the ECG caused by myocardial ischemia, and Xinmailong Injection can significantly reduce the level of the lipid peroxide malondialdehyde (MDA), reduce the activity of creatine phosphokinase (CPK) and lactate dehydrogenase (LDH) in blood, and improve glutathione peroxidase (GSH-PX) and SOD activity in myocardial tissue.