Which of the following rhythms is most likely to show signs of inferior wall ischemia on an ECG?

Signs of inferior wall ischemia on an ECG are typically characterized by changes in the ST segments and T waves in the inferior leads (II, III, and aVF). The presence of inferior ST segment elevation specifically indicates that there is injury to the heart muscle in the inferior region, often related to occlusion of the right coronary artery in a typical situation.

When the ECG displays ST segment elevations in these inferior leads, it suggests that the myocardial tissue is experiencing insufficient blood flow, which can lead to ischemia. This situation is critical and warrants immediate medical intervention to restore blood supply to the affected area.

In contrast, atrial fibrillation, ventricular tachycardia, and supraventricular tachycardia represent different types of arrhythmias that do not directly indicate ischemia localized to the inferior wall of the heart. While they can be associated with broader cardiac issues, they lack the specific ECG changes (specifically ST segment elevation in the inferior leads) that indicate inferior wall ischemia.