CVS Practice Test 2026 - Free CVS Practice Questions and Study Guide

The precordial leads are a specific set of ECG leads that provide detailed information about the heart's electrical activity in the horizontal plane. These leads include V1 through V6.

Each of the precordial leads is placed on the chest in designated locations, which allows for the monitoring of different areas of the heart. V1 is positioned in the fourth intercostal space at the right sternal border, while V6 is located in the same intercostal space at the left midaxillary line. The arrangement of these leads is designed to capture the electrical impulses as they travel through the heart, enabling healthcare professionals to assess issues related to heart function such as ischemia or arrhythmias.

Using leads V1 to V6 provides a comprehensive view of the heart's anterior and lateral walls, making them vital for accurate diagnosis in clinical settings. The other choices represent different sets of leads that monitor different aspects of cardiac activity but are not classified as precordial leads.