ABSTRACT
Aim To explore protective effect of Sanweitanxiang powder on isoproterenol-induced myocardial ischemia in rats, and its possible mechanism. Methods A myocardial ischemia model in rats was established by intraperitoneal injection of isoproterenol (Iso 5 mg?kg-1 once a day ,for 3 days). After ip 24 h, The levels of LDH、CK in serum and NOS、iNOS and NO in the myocardium tissue were measured. The myocardial area suffered from ischemia injury were determined. The changes of myocardial ultrastructure were observed with electron microscope. Results Compared with model group, the levels of LDH、CK and infarction size of myocardium were decreased. The concentrations of NOS, iNOS and NO in myocardium were less than those in the model group. The results of myocardial ultrastructure indicated that the partial mitochondria crista and myofibrils sprase, z band unaltered in Sanweitanxiang powder groups. Conclusion Sanweitanxiang powder has a significant protective effect on isoproterenol-induced myocardial injury in rats. By improving the energy metabolism of myocardium,the structure and function of mitochondria and reducing the NO release.