Which EKG change is indicative of an inferior myocardial infarction?

The indication of an inferior myocardial infarction can be identified through specific ST segment changes noted on an electrocardiogram (EKG). The correct choice reflects classic EKG findings associated with inferior wall ischemia, predominantly observed in leads II, III, and aVF. These leads correspond to the inferior aspect of the heart and allow for the evaluation of blood flow to the coronary arteries supplying this area.

In cases of an inferior myocardial infarction, there is often an elevation in the ST segments within these leads, indicating that there is injury occurring to the heart muscle in this region. This type of infarction is commonly linked to occlusion of the right coronary artery in the right-dominant coronary circulation, which supplies the inferior wall of the left ventricle as well.

The other choices provided reflect different cardiac conditions or findings. Elevation in leads I and aVL would suggest lateral wall involvement and is not consistent with inferior ischemia. ST segment depression typically indicates ischemia rather than a full infarction and is often seen during exertion or as a transient issue rather than an acute myocardial infarction. Isolated T wave inversion can occur in various conditions and is not specific to inferior myocardial infarction, as it can also appear in cases of ischem