Which ECG leads indicate an inferior myocardial infarction?

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Multiple Choice

Which ECG leads indicate an inferior myocardial infarction?

Leads II, III, and aVF reflect the inferior wall of the left ventricle. When this area is ischemic, ST-segment elevation appears in these inferior leads, which is how an inferior myocardial infarction is identified on ECG. This pattern is often due to occlusion of the right coronary artery. You might also see reciprocal ST-segment depression in high-lateral leads such as I and aVL. The other lead groups map to different regions: lateral leads (I, aVL, and V5) indicate a lateral wall involvement; anterior leads (V3, V4) indicate anterior wall involvement; septal leads (V1, V2) indicate septal involvement.

Leads II, III, and aVF reflect the inferior wall of the left ventricle. When this area is ischemic, ST-segment elevation appears in these inferior leads, which is how an inferior myocardial infarction is identified on ECG. This pattern is often due to occlusion of the right coronary artery. You might also see reciprocal ST-segment depression in high-lateral leads such as I and aVL.

The other lead groups map to different regions: lateral leads (I, aVL, and V5) indicate a lateral wall involvement; anterior leads (V3, V4) indicate anterior wall involvement; septal leads (V1, V2) indicate septal involvement.

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