Which leads are classified as posterior leads?

The posterior leads in the ECG lead system include V7, V8, and V9. These leads are specifically placed on the back of the body and help assess the electrical activity of the heart from a posterior perspective. This positioning is vital for diagnosing conditions such as posterior wall myocardial infarctions, where changes may not be adequately captured using the standard anterior leads.

In clinical practice, proper placement of V7, V8, and V9 is essential—V7 is placed in the left posterior axillary line at the same horizontal level as V6, V8 is positioned along the left scapular line, and V9 is placed at the left paraspinal line. The correct identification of these leads is important for adequate monitoring and interpretation of ECG findings related to the posterior aspect of the heart.