Objective To investigate the protective effects and mechanisms of Angong Niuhuang Pill(ANP)or Xingnaojing(XNJ)used in preconditioning of myocardial ischemia-reperfusion injury in rabbits.

A study on effect and mechanism of Angon Niuhuang pill(AGNHP)was carried out. The animal model of meningeal leukemia in mice was established and the L7212 leukemia was inoculated on it.