The lead aVL for predicting the culprit artery in inferior wall acute myocardial infarction

AIM:The aim of this study is to investigate the lead aVL for predicting the culprit artery in inferior wall acute myocardial infarction(AMI). MEHTODS:According to the features of electrocardiogram(ECG)in lead aVL,patients were divided into pattern A( R≥3S,ST segment depression≤1 mm)and pattern B (R3S,ST segment depression 1 mm). Infarction related arteries (IRA) were divided into entities of right coronary artery (RCA)(34 cases) or left circumflex artery (LCX)(15 cases)confirmed by coronary arteriography in 49 patients with inferior wall AMI. RESULTS: The incidence of pattern A was higher in LCX group than that in RCX group( P 0.05),with the sensitivity and specificity of 80.0% and 79.4% respectively in predicting occlusion of LCX. The incidence of pattern B was higher in RCA group than that in LCX group ( P 0.05) with the sensitivity and specificity of 79.4% and 80.0% respectively in predicting occlusion of RCA. COCLUSION: Pattern A of the QRS complex in lead aVL is a sensitive and specific marker for LCX artery occlusion, whereas pattern B suggests RCA related AMI diseases.