RCIS Practice Test 2025 – All-in-One Exam Prep

In the case of an inferior wall myocardial infarction, the leads that show ST segment elevation are specific to the anatomical positioning of the heart and the corresponding electrical activity recorded by the electrocardiogram (ECG).

Leads II, III, and aVF are positioned to monitor the inferior part of the heart, specifically looking at the right coronary artery's territory, which supplies blood to the inferior wall. During an inferior wall MI, due to ischemia or damage to this area, the electrical activity changes, leading to ST segment elevation within these specific leads. This elevation indicates that there is active damage and myocardial cell death occurring in that portion of the heart.

Other choices may represent leads that monitor areas of the heart not affected by an inferior wall MI. For example, Leads I and aVL primarily monitor the lateral wall of the heart, while leads I, II, and V1 cover a broader range, including the anterior wall and do not specifically focus on the inferior aspect. Therefore, they would not show the characteristic ST elevation associated with an inferior wall MI.