2011•Hainan yixueRequires access
The relationship between the ratio of ST segment changes and infarct-related artery in acute inferior myocardial infarction
Chen Hua-f
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Abstract
Objective To investigate the relationship between the ratio of ST segment changes and infarct-related artery in acute inferior myocardial infarction. Methods The ratio of ECG I, Ⅱ, Ⅲ, aVL ,V3ST ST segment changes in 87 cases with acute inferior myocardial infarction was analyzed, then compared with coronary angiography. Results There were 70 cases with infarct-related artery (IRA) were the right coronary artery (RCA) (80.5%), and 17 cases were left coronary circumflex artery (LCX) (19.5%). ST↑Ⅲ/ST↑Ⅱ1,ST↓aVL/ST↓Ⅰ1,ST↓V3/ ST↑Ⅲ≤1.2 prompts IRA as RCA, with higher sensitivity and specificity, and the highest positive predictive value (PPV); ST↑Ⅲ/ST↑Ⅱ≤1, ST↓aVL/ST↓Ⅰ≤1,ST↓V3/ ST↑Ⅲ1.2 prompts IRA to LCX, with higher negative predictive value (NPV), the difference was statistically significant (P0.01). Conclusion RCA is the main infarct-related artery in acute inferior myocardial infarction, and the radio of ST segment changes can predict infarction-related artery in acute inferior myocardial .