In an inferior-right ventricular infarction, which leads typically show ST elevation?

In an inferior-right ventricular infarction, the leads that typically show ST elevation are those that reflect the inferior wall of the heart, specifically leads II, III, and AVF. This pattern is indicative of a blockage in the right coronary artery, which supplies blood to the inferior wall of the heart.

Lead II, which is positioned to monitor the electrical activity from the right atrium to the left leg, shows an upward deflection in response to any injury to that area. Lead III captures the electrical signals from the left arm to the left leg, and AVF monitors the electrical signals directed towards the feet. All three leads provide critical information regarding the inferior wall’s perfusion and any ischemic changes that occur during an inferior infarction.

While other combinations contain leads that may not be associated with the inferior wall changes during a right ventricular infarction, the presence of ST elevation specifically in leads II, III, and AVF provides a clear demonstration of the infarction's electrical activity correlating with the anatomical region affected. The involvement of these leads is essential for accurate diagnosis and management of the patient's condition.