方法: 将27只大鼠的离体鼠心脏用langendorff装置灌注稳定20分钟后，随机分为3组，每组9只，给予不同的处理。

• Method: 27 isolated rat hearts were perfused with oxygen-bicarbonated Krebs-Henseleit buffer in the Langendorff mode for 20 minutes. These hearts were then randomly divided into three groups : Group A(n=9, sham controls, SC), the hearts were perfused continuously for another 15 min;