结果应用异丙肾上腺素可导致明显的心肌缺血坏死及纤维化；
RESULTS myocardial ischemia induced by Iso presented obvious myocardial necrosis and fibrosis.
目前各种治疗心肌梗死的方法如药物、介入、手术治疗也只能改善心肌缺血，不能挽救坏死心肌。
Today all kind of methods to treat MI such as drug, interventional and surgical therapy only can better myocardium ischemia but cannot rescue necrotized myocardium.
急性心肌梗死患者QT变异度指数增高，可能是由于急性心肌梗死造成的心肌缺血和坏死使心室复极变异增大。
But QTVI of AMI was higher than the control group, which suggested greater repolarization liability in AMI caused by myocardial ischemia and infarction.
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