Which leads on an EKG assess the inferior surface of the heart?

The inferior surface of the heart is primarily supplied by the right coronary artery in a right-dominant coronary system, and this area can be effectively evaluated using specific leads on an electrocardiogram. The leads that assess the inferior portion are II, III, and aVF.

Lead II views the electrical activity moving toward the left foot, which provides a good angle to visualize the inferior wall of the heart. Lead III, while also directed toward the left foot, offers a different perspective that can highlight abnormalities in the inferior wall. Lead aVF is similarly positioned to view the inferior aspects of the heart and completes the assessment of this region. Each of these leads helps in identifying issues such as inferior wall myocardial infarctions or ischemia by capturing electrical activity from this particular area.

Understanding the role of each lead is essential for accurate interpretation of EKG readings, especially in critical care settings where timely diagnosis can significantly impact patient outcomes. The other leads mentioned in the other choices do not specifically target the inferior wall and are instead suited to evaluate different regions of the heart, such as the anterior or lateral walls.