Value of ECG in the prediction of infarction related coronary artery in acute inferior myocardial infarction

Objective To evaluate the value of ECG in the prediction of infarction related coronary artery(IRA) and assessment of prognosis in patients with acute inferior myocardial infarction.Methods Relationship between the results from ECG and coronary angiography,cardiac event during hospitalization were observed in 163 patients with acute inferior myocardial infarction.Results Of these 163 cases with acute inferior myocardial infarction.112 cases had lesions of right coronary artery (RCA),51 eases had lesions of left circumflex coronary artery (LCX).When RCA was the main infarction related coronary artery,ST elevation in leadⅢwas greater than ST elevation in leadⅡ.ST depression in aVL and ST elevation in lead aVR.When LCX was the infarction related artery,ECG mostly expressed as ST elevation in leadⅢless than ST elevation in leadⅡ,ST elevation in a VL and ST depression in aVR.ST elevation in leadⅢgreater than ST elevation in leadⅡdenoted the incidence of association with right ventricular infarction and bradycardia-arrhythmia was higher than those with ST elevation in leadⅢless than ST elevation in leadⅡ.Conclusions ST segment shift in ECG could be used to predict the IRA and assess the prognosis of patients with acute inferior myocardial infarction.