Occlusion of which artery is most commonly associated with a lateral wall myocardial infarction?

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Multiple Choice

Occlusion of which artery is most commonly associated with a lateral wall myocardial infarction?

The lateral wall of the left ventricle is supplied mainly by the obtuse marginal branches of the left circumflex artery. When the LCx becomes occluded, perfusion to that lateral region is lost, producing a lateral wall myocardial infarction. Most people have the right coronary artery supplying the inferior wall, so LCx is the artery most closely linked to lateral-wall damage. In left-dominant circulation, the LCx can also contribute to the posterior circulation, but the hallmark territory for LCx-related infarction remains the lateral wall. Clinically, this often shows ST elevations in lateral leads (I, aVL, V5–V6).

The lateral wall of the left ventricle is supplied mainly by the obtuse marginal branches of the left circumflex artery. When the LCx becomes occluded, perfusion to that lateral region is lost, producing a lateral wall myocardial infarction. Most people have the right coronary artery supplying the inferior wall, so LCx is the artery most closely linked to lateral-wall damage. In left-dominant circulation, the LCx can also contribute to the posterior circulation, but the hallmark territory for LCx-related infarction remains the lateral wall. Clinically, this often shows ST elevations in lateral leads (I, aVL, V5–V6).

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