Objective To study the delayed protective effects of norepinephrine preconditioning by express-ing heat shock protein70(HSP70)on reperfused myocardium in isolated rat heart.

• 目的观察去甲肾上腺素预处理后热休克蛋白(HSP70)在心肌细胞的表达以研究去甲肾上腺素预处理对大鼠离体缺血再灌注损伤心肌的延迟性保护作用。