ST elevations in V1, V2, V3 indicate which MI and artery?

ST elevations in V1, V2, V3 indicate which MI and artery?

• A. Lateral wall MI, left circumflex artery
• B. Anteroseptal MI, left anterior descending artery
• C. Inferior wall MI, right coronary artery
• D. Posterior wall MI, posterior descending artery

Answer: (C)

ST elevations in the chest leads V1 through V3 map to the anterior/septal region of the left ventricle. When these leads show elevation, it points to an anteroseptal myocardial infarction, most often due to occlusion of the left anterior descending artery. This contrasts with an inferior-wall infarction, which elevates the inferior leads (II, III, aVF) and is usually from the right coronary artery. A lateral-wall infarction elevates the lateral leads (I, aVL, V5-V6). Posterior-wall infarction isn’t diagnosed by ST elevations in V1-V3; instead you typically see reciprocal changes (ST depression) in these leads with ST elevations seen in posterior leads such as V7-V9.

ST elevations in the chest leads V1 through V3 map to the anterior/septal region of the left ventricle. When these leads show elevation, it points to an anteroseptal myocardial infarction, most often due to occlusion of the left anterior descending artery. This contrasts with an inferior-wall infarction, which elevates the inferior leads (II, III, aVF) and is usually from the right coronary artery. A lateral-wall infarction elevates the lateral leads (I, aVL, V5-V6). Posterior-wall infarction isn’t diagnosed by ST elevations in V1-V3; instead you typically see reciprocal changes (ST depression) in these leads with ST elevations seen in posterior leads such as V7-V9.