Which leads on the ECG represent the lateral wall of the heart?

The leads that represent the lateral wall of the heart are I, aVL, V5, and V6. These leads are positioned in a way that allows them to accurately reflect electrical activity from the lateral aspect of the left ventricle, which is primarily supplied by the left circumflex artery.

Lead I is oriented horizontally across the chest and captures lateral wall activity, while aVL provides a view from a more superior angle, also focusing on the lateral wall. Leads V5 and V6 are placed in the left axillary line, further enhancing the detection of signals from the lateral wall of the heart during systole.

The correct identification of these leads is essential for diagnosing conditions such as lateral wall myocardial infarction and assessing overall cardiac function. Understanding which leads represent specific regions of the heart aids in the clinical interpretation of ECG findings and guides appropriate management.