Which leads typically show ST segment elevation in inferior wall infarction?

ST segment elevation in an inferior wall infarction is typically observed in the leads that represent the inferior wall of the heart. These leads are positioned to capture electrical activity from the inferior aspect, which is primarily supplied by the right coronary artery in most individuals (in right-dominant coronary systems).

The leads that show this elevation include lead II, which looks at the inferior side of the heart from the left leg's perspective, lead III, which also views the inferior wall from the left arm to the right leg, and lead aVF, which provides a view from the feet. This configuration allows for the assessment of changes that indicate injury or ischemia in the inferior wall. Therefore, the presence of ST segment elevation in these leads serves as a vital diagnostic marker for an inferior wall myocardial infarction.