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Inferior Myocardial Infarction Inferior Wall MI (Example 1) Inferior Wall MI (Example 2) Inferior Wall MI (Example 3) Inferior Wall MI (Example 4) Inferior Wall MI (Example 5) Inferior Wall MI (Example 6) Inferior Wall MI with RBBB (Example 5) Old Inferior Wall MI (Example 1) Old Inferior Wall MI (Example 2) An inferior wall myocardial infarction (IWMI) occurs when inferior myocardial tissue supplied by the right coronary artery (RCA), dies due to thrombosus of that vessel. When an IWMI extends to posterior regions as well, an associated posterior wall MI may occur. The ECG findings of an acute IWMI include: 1) ST segment elevation in the inferior leads (II, III, and aVF). 2) Reciprocal ST segment depression in the lateral and/or high lateral leads (I, aVL, V5 and V6). Note: If the reciprocal ST depressions are not present, consider alternative causes of ST segment elevation such as pericarditis. |
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