Which lead primarily views the inferior wall of the heart in a 12 lead EKG?

Lead II is primarily associated with viewing the inferior wall of the heart in a 12-lead EKG. This lead is oriented in such a way that it looks at the heart from the lower left side (the inferior aspect). The specific orientation of Lead II allows it to capture electrical activity originating from the inferior wall, which is supplied by the right coronary artery in most individuals.

Understanding the function of the other leads helps clarify why Lead II is the correct choice. Lead V1, placed at the fourth intercostal space on the right side of the sternum, primarily monitors the right ventricle and does not provide a view of the inferior wall. Lead V5, located on the left side at the same level, primarily assesses the left lateral wall of the heart and also does not focus on the inferior area. Lead aVL, which is oriented to the left arm, mainly views the lateral wall rather than the inferior wall.

Thus, Lead II's specific placement and angle make it the most effective choice for observing the inferior wall's electrical activity in a 12-lead EKG reading.