Objective To study the effect and mechanism of Supplemented Danshen Yin (DSY) on myocardial ischemia in rats. Methods Myocardial ischemia of rat models were induced by occluding the left anterior descending coronary artery, the effects of DSY (8.24,4.12, 2.06 g/kg) on the creatine kinase (CK), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), malondialdehyde (MDA), super oxide dismutase (SOD) and glutathione-px (GSH- Px) contents in rats were observed. Results Compared with model group, the raise of ST segment in th...