心肌缺血预适应对急性心肌梗死ST段形态的影响

目的探讨心肌缺血预适应对急性心肌梗死ST段形态的影响。方法103例初发急性心肌梗死按入院时梗死相关导联ST段抬高形态分为凹面向上组和凸面向上组,以梗死发生前24h至少出现1次典型心绞痛症状为标准,比较两组频率。结果梗死前24h内出现心绞痛凹面向上组34例(73.91%),凸面向上组14例(24.56%);无心绞痛凹面向上组12例(26.09%),凸面向上组43例(75.44%)。两组差异均有非常显著性意义(P<0.01)。结论心肌缺血预适应是急性心肌梗死ST段凹面向上抬高的机制之一,根据心电图ST段凹面抬高推断其梗死前存在缺血预适应及由此产生的心肌保护作用对临床有重要意义。

Infarction of myocardial ischemic preconditioning to electrocardiogram ST segmant form in acute myocardial infarction

Objective To explore influence of myocardial ischemic preconditioning in acute myocardial infarction of electrocardiogram ST segmant form. Methods According to rise form of ST segment in acute myocardial infarction when in hospital,103 patients with initial onset were divided into two groups which were concave rise group and convex rise group.Frequency was compared by two groups according to typical angina occurred at least once within 24 hours before hospitalizing. Results 34(73.91%) in concave rise group and 14(24.56%) in convex rise group had typical angina,12(26.09%) in concave rise group hadn't typical angina, 43(75.44%) in convex rise group also hadn't . There were significant difference in two groups(P<0.01). Conclusion Myocardial ischemic preconditioning was one of mechanisms about ST segment concave rise.According to it,we can judge whether ischemic preconditioning occured before acute myocardial infarction.And it had benefit in myocardium protection by ischemic preconditioning .