Which leads show inferior wall STEMI?

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Multiple Choice

Which leads show inferior wall STEMI?

Inferior wall STEMI is indicated by ST elevations in the inferior-looking leads, which view the bottom wall of the left ventricle. This area is typically supplied by the right coronary artery, so its occlusion causes injury currents that produce ST elevation in leads II, III, and aVF. Reciprocal changes are common, showing ST depression in the high lateral leads I and aVL. Leads reflecting other regions won’t show this exact pattern: elevations in I and aVL point to a lateral-wall MI (often from the left circumflex), elevations in V1–V2 indicate a septal region (LAD), and elevations in V5–V6 indicate the lateral wall as well.

Inferior wall STEMI is indicated by ST elevations in the inferior-looking leads, which view the bottom wall of the left ventricle. This area is typically supplied by the right coronary artery, so its occlusion causes injury currents that produce ST elevation in leads II, III, and aVF. Reciprocal changes are common, showing ST depression in the high lateral leads I and aVL.

Leads reflecting other regions won’t show this exact pattern: elevations in I and aVL point to a lateral-wall MI (often from the left circumflex), elevations in V1–V2 indicate a septal region (LAD), and elevations in V5–V6 indicate the lateral wall as well.

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