ST elevation in leads V1 to V4 most commonly indicates infarction of which wall of the heart?
Anterior wall
Precordial leads V1 to V4 face the anterior wall of the left ventricle, which is supplied mainly by the left anterior descending (LAD) artery. ST elevation in V1–V4 is therefore characteristic of an anterior-wall myocardial infarction.
Inferior wall MI shows changes in II, III, aVF; lateral wall in I, aVL, V5–V6; and posterior wall produces reciprocal ST depression in V1–V3 rather than elevation.
Hence, Anterior wall.
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