When there is ST elevation, which area of the heart is indicated in an inferior segment?

ST elevation in the inferior segment of the heart specifically points to the area supplied by the right coronary artery (RCA) in most individuals. This elevation is typically observed in leads II, III, and aVF on the 12-lead EKG, which correspond to the inferior wall of the heart.

Recognizing the significance of ST elevation in this area is crucial for diagnosing inferior myocardial infarction (MI). The inferior wall is vital for proper heart function, and damage in this region can impact the heart's overall efficiency. Understanding the relationship between the leads and the corresponding areas of the heart helps healthcare professionals accurately interpret EKGs and determine the specific type of myocardial injury or ischemia present.

This understanding distinguishes inferior segment indications from other areas such as lateral, septal, or anterior segments, each of which has different coronary artery supplies and EKG leads associated with them.