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| The electrocardiogram characteristics of left circumflex artery as infarction related artery in acute myocardial infarction |
| GUO Chen-Xian, SHEN Zhi-Jie, WANG Xiao-Long |
| (1.Department of Cardiology, Wujin Hospital of Chinese Traditional Medicine, Changzhou Jiangsu 213161; 2. Department of Cardiology, Shuguang Hospital不从心Affiliated to Shanghai University of Chinese Traditional Medicine, Shanghai 201203, China) |
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Abstract Objective To analyze the electrocardiogram characteristics of left circumflex artery as infarction related artery(IRA) in acute myocardialinfarction. Methods 94 cases of acute myocardial infarction with infarction related artery of left circumflex artery(LCX) and right coronary artery (RCA) patients were collected from January 2010 to July 2013 in Shuguang hospital affiliated to Shanghai university of traditional Chinese medicine. The emergency electrocardiogram characteristics of patients were retrospectively analyzed with ST segment changes in lead Ⅰ, aVL; lead of inferior 8wall (Ⅱ,Ⅲ,[LM]aVF) and chest leads. Comparison of STⅡand STⅢwas measured under the condition when IRA was LCX or RCA with elevated ST segment in theinferior wall. Results Among the full set of patients with acute myocardial infarction, IRA with LCX counted for 30 cases while IRA with RCA, 64 cases. (i) Correlation analysis of lead Ⅰ, aVL with IRA: Lead Ⅰ depression in IRALCX, 3 cases; nondepression 27 cases. Lead Ⅰ depression in IRARCA, 22 cases; non-depression 42 cases with statistically significance in two groups (P=0.013).Lead aVL depression in IRALCX, 3cases; nondepression 27 cases.Lead aVL depression in IRARCA, 26 cases; nondepression 38 cases with statistically significance in two groups (P=0.003). (ii) Correlation analysis of lead Ⅱ,Ⅲ, aVF with IRA: Lead of inferior wall elevation in IRALCX, 10 cases; nonelevation 20 cases. Lead of inferior wall elevation in IRARCA, 51 cases; nonelevation 13 cases with statistically significance in two groups (P<0.01). While ST elevated in both IRA for RCA and LCX, IRALCX,STⅡ≥STⅢ 7 cases; STⅢ>STⅡ 3 cases; IRARCA, STⅡ≥STⅢ 15 cases; STⅢ>STⅡ 36 cases with significant statistically meaning (P<0.05). (iii) Correlation analysis of chest lead V1-V9 for IRA, non-statistically meaning was measured. Conclusion IRA for LCX in acute myocardial infarction may have such characteristics as neither obvious depression in lead Ⅰ, aVL; nor obvious elevation in lead Ⅱ,Ⅲ,aVF. While both IRA for LCX and RCA with inferior wall elevation , IRALCX is likely to be STⅡ≥STⅢ.
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2015, Vol. 24 
