Table 1

Common ECG features distinguishing the culprit artery in acute inferior wall myocardial infarction

Right coronary artery occlusionLeft circumflex artery occlusion
CriterionSensitivity (%)Specificity (%)CriterionSensitivity (%)Specificity (%)
RCA, right coronary artery.
1. ST↑ V3R, V4R100871. No ST↓ aVL8093
2. Ratio of ST↓ V3 to ST↑ III
    <0.5 = proximal RCA91912. Ratio of ST↓ V3 to ST↑ III >1.28495
    0.5–1.2 = distal RCA8493
3. S:R wave ratio aVL >37688
4. ST↑ III > II88943. S:R wave ratio aVL ⩽38876
5. ST↓ aVL > I8094