Which ECG leads show an anterior myocardial infarction?

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Multiple Choice

Which ECG leads show an anterior myocardial infarction?

Anterior wall infarction shows up on the ECG as ST-segment elevation in the anterior chest leads, which are V1 through V4, with V3 and V4 being classic indicators. These leads correspond to the front surface of the left ventricle supplied by the left anterior descending artery, so ST elevations there point to an anterior MI. In contrast, inferior leads (II, III, aVF) reflect the bottom of the heart, and lateral leads (I, aVL, V5, V6) reflect the side, so they don’t indicate an anterior MI. Therefore, ST elevations in V3 and V4 best indicate an anterior myocardial infarction.

Anterior wall infarction shows up on the ECG as ST-segment elevation in the anterior chest leads, which are V1 through V4, with V3 and V4 being classic indicators. These leads correspond to the front surface of the left ventricle supplied by the left anterior descending artery, so ST elevations there point to an anterior MI. In contrast, inferior leads (II, III, aVF) reflect the bottom of the heart, and lateral leads (I, aVL, V5, V6) reflect the side, so they don’t indicate an anterior MI. Therefore, ST elevations in V3 and V4 best indicate an anterior myocardial infarction.

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