Which leads represent the territory of the left coronary artery?

In large LAD infarctions, ECG signs of ischemia can be found in all chest leads from V1 to V6. In a supra-apical infarction, ECG signs of ischemia are typically found in leads V1 to V3. If the anterior septum is affected without the lateral wall, ECG changes typically occur in V2 and V3, or, if the infarction area is large, even in V1 to V4. If stenosis occurs in a large diagonal branch with an otherwise open LAD, an infarction of the antero-lateral wall occurs. In this case, ECG signs of ischemia are usually seen in leads I and aVL.

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