After 30 minutes reperfusion ,the myocardial water content,coronary flow recovery(CFR),coronary vascular resistence(CVR),ATP and CP content ,left ventricular systolic pressure(LVSP),CK and LDH leakage were measured and compared among the four groups.

• 观察冠状血管阻力（CVR）、冠状动脉流量恢复率（CFR）、心肌含水量和超微结构变化。