Objective : To evaluate the dynamic change ofinfarct related arteries (IRA) with continued monitoring of STsegmentin early acute myocardial infarction (AMI)- Methods :61 patients (46 males and 15 females , aged 39 ～80) with AMIunderwent 24 hours , Holter monitoring within 6 hours after the symptom onset- The changes of STsegment was observed continually and was compared with the results of coronary arteries angiography- Results : ①In the patients who had occluded IRA, STsegmentremained elevated with a tendency to decline- ②In those who had successful reperfusion ,STsegment reduced rapidly after reperfusion and then kept stable- ③Intermittent fluctuating up and down of STsegment was observed com monly during the first 24 hours in all AMIpatients ,especially in the earliertime after successfulthrombolysis- Conclusion : The dynamic changes of IRA between opening and occluding were showed in early AMI- The continued monitoring of STsegment can be used to evaluate the dynamic changes of IRA-
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