Cardiac Medicine Certification Practice Exam 2025 – Comprehensive Prep Guide

ST segment elevation in the leads II, III, and aVF is characteristic of an inferior myocardial infarction, which typically results from occlusion of the right coronary artery in right-dominant circulation. These leads reflect the inferior wall of the heart, and their elevation indicates that the inferior region is experiencing ischemia or infarction. This pattern is crucial for clinicians to identify, as it aids in the diagnosis and management of myocardial infarction by correlating with the area of the heart that is affected.

In contrast, the other options point to ST segment changes in leads that are not indicative of inferior myocardial infarction. Elevation in V1, V2, and V3 is typically associated with anterior wall ischemia, while ST elevation in V4, V5, and V6 relates to lateral wall complications. The choice indicating no significant ST changes would imply a lack of ischemia, which contradicts the expected findings in an inferior myocardial infarction. Understanding these specific lead changes is essential for diagnosing the location and extent of ischemic injury effectively.