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The clinical role of electrocardiogram in determining RCA or LCX that results in acute inferior myocardial infarction

Chen Li-hu

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Abstract

Objective To understand the clinical role of electrocardiogram in determining RCA or LCX resulting in acute inferior myocardial infarction(AIMI). Method 100 patients with AIMI underwent 18-lead ECG 6hrs after onset and coronary angiography was conducted two weeks after onset. The ST-segment changes were compared with the results of coronary angiography. Findings Coronary angiography determined RCA 82 cases and LCX 18 cases. STⅢ↑/STⅡ↑1.0,STaVL↓/STⅠ↓ 1. 0,STV3↓/ STⅢ↑≤1.2 indicated that RCA's sensitivity and specificity were higher than those of LCX; STⅢ↑/STⅡ↑≤1.0,STaVL↓/STⅠ↓≤1.0,STV3↓/ STⅢ↑1.2 indicated that LCX's sensitivity and specificity was higher than that of RCA. The differences were statistically significant(P 0. 01). Conclusion ECG has high accuracy in determining AIMI related artery.ECG ST-segment changes can serve as a reliable precursor of related artery of AIMI.

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Objective To understand the clinical role of electrocardiogram in determining RCA or LCX resulting in acute inferior myocardial infarction(AIMI). Method 100 patients with AIMI underwent 18-lead ECG 6hrs after onset and coronary angiography was conducted two weeks after onset. The ST-segment changes were compared with the results of coronary angiography. Findings Coronary angiography determined RCA 82 cases and LCX 18 cases. STⅢ↑/STⅡ↑1.0,STaVL↓/STⅠ↓ 1. 0,STV3↓/ STⅢ↑≤1.2 indicated that RCA's sensitivity and specificity were higher than those of LCX; STⅢ↑/STⅡ↑≤1.0,STaVL↓/STⅠ↓≤1.0,STV3↓/ STⅢ↑1.2 indicated that LCX's sensitivity and specificity was higher than that of RCA. The differences were statistically significant(P 0. 01). Conclusion ECG has high accuracy in determining AIMI related artery.ECG ST-segment changes can serve as a reliable precursor of related artery of AIMI.

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Available abstract

Objective To understand the clinical role of electrocardiogram in determining RCA or LCX resulting in acute inferior myocardial infarction(AIMI). Method 100 patients with AIMI underwent 18-lead ECG 6hrs after onset and coronary angiography was conducted two weeks after onset. The ST-segment changes were compared with the results of coronary angiography. Findings Coronary angiography determined RCA 82 cases and LCX 18 cases. STⅢ↑/STⅡ↑1.0,STaVL↓/STⅠ↓ 1. 0,STV3↓/ STⅢ↑≤1.2 indicated that RCA's sensitivity and specificity were higher than those of LCX; STⅢ↑/STⅡ↑≤1.0,STaVL↓/STⅠ↓≤1.0,STV3↓/ STⅢ↑1.2 indicated that LCX's sensitivity and specificity was higher than that of RCA. The differences were statistically significant(P 0. 01). Conclusion ECG has high accuracy in determining AIMI related artery.ECG ST-segment changes can serve as a reliable precursor of related artery of AIMI.

Key concepts: Medicine, Cardiology, Coronary angiography, Internal medicine, Right coronary artery, Myocardial infarction, Electrocardiography, Angiography

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