Which leads are used to diagnose an anterolateral MI?

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Multiple Choice

Which leads are used to diagnose an anterolateral MI?

Anterolateral myocardial infarction involves injury to the front and side of the left ventricle, so the ECG changes are best seen in leads that view the lateral wall. The lateral/anterolateral region is most closely represented by the left precordial leads V5 and V6, which sit over the lateral aspect of the left ventricle. When ischemia or infarction affects this area, ST elevation or other ischemic changes appear in these leads. Thus findings in V5 and V6 are a classic way to recognize an anterolateral MI, especially when they accompany changes in other lateral leads such as I and aVL. In contrast, the inferior leads (II, III, aVF) reflect the inferior wall, and V1–V4 reflect anterior/septal regions, so they are less specific for the anterolateral territory.

Anterolateral myocardial infarction involves injury to the front and side of the left ventricle, so the ECG changes are best seen in leads that view the lateral wall. The lateral/anterolateral region is most closely represented by the left precordial leads V5 and V6, which sit over the lateral aspect of the left ventricle. When ischemia or infarction affects this area, ST elevation or other ischemic changes appear in these leads. Thus findings in V5 and V6 are a classic way to recognize an anterolateral MI, especially when they accompany changes in other lateral leads such as I and aVL. In contrast, the inferior leads (II, III, aVF) reflect the inferior wall, and V1–V4 reflect anterior/septal regions, so they are less specific for the anterolateral territory.

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