The Electrocardiographic Features Of Patients With Occlusion Of Different Segments Of The Letf Circumflex Coronary Artery

Objective：The aim of this study was to investigate the change of electrocardiographic inOcclusion of different segment of the left circumflex coronary artery, age, multi vessel diseaseand different dominant coronary types， analyze the characteristic of electrocardiogram andclinical in acute left circumflex coronary artery.Methods：A total of246patients with acute occlusion of left circumflex coronary artery(187males and59females) were recruited for the study. According to the results of coronaryangiography, we grouped the patients with age, multi/single vessel disease, complicated byLAD/RCA, combined by age, sex and risk factors. We compare ECG changes and result ofcoronary angiography.Result: The ECG changes of circumflex artery occlusion affected by different dominantcoronary types, in II, III, aVF, V7-V9leads, ST segment elevation is common in left dominanttype. V1-V3lead ST segment depression is common in the balanced type, I, aVL lead STsegment elevation is non specific in all the advantages of type. In single vessel disease,V1-V3lead ST segment depression is common in proximal occlusion, II, III, aVF lead STsegment elevation is common in the distal occlusion, V7-V9and I aVL leads ST segmentelevation are non-specific in single vessel disease. There are difference features in ECG aboutsingle vessel disease and multi vessel disease, in the proximal LCX occlusion, patients withmulti vessel disease more likely to merge V7-V9lead ST segment elevation, in middle LCXocclusion, there are non-specific change in single or multi vessel disease, and patients withV1-V3lead ST segment depression are more likely to merge multi vessel disease. Patient withLCX occlusion complicated with LAD/RCA have no significant difference in ECG. Age,smoking history, hypertension, diabetes, gender, combined LM stenosis is an independent riskfactor for the occurrence of MACE event, and smoking history, hypertension, diabetes andcombined LM stnosis have greater effect in MACE event. Conclusion: ECG has important value in diagnosis of the infarct-related arterycircumflex artery in acute myocardial infarction, we can assess the prognosis of patients withacute myocardial infraction combined the patients combined the history and generalinformation.