Protective effect of the pretreatment with Chuanxiong-pathalide A on the vascular endothelial cells impaired by the ischemia and reperfusion in isolated rats hearts Effects of Varglaucocalyx on c-fos Gene Expression during Globl Myocardial Ischemia-Reperfusion in Rat Mechanism of Canscora lucidissima Xanthones Against Arrhythmia Induced by Myocardial Ischemia-reperfusion in Rats