Question

Where are the 6 precordial or "chest" leads?

A)On the left leg
B)On the right arm
C)On the chest or thorax
D)On the right leg

Answer 1

The 6 precordial or 'chest' leads in a 12-lead ECG are placed on the chest or thorax and provide valuable information about the heart's electrical activity.

Step-by-step explanation:

The 6 precordial or 'chest' leads in a 12-lead ECG are placed on the chest or thorax (C). These leads are used to measure the electrical activity of the heart from different angles and provide a comprehensive view of the heart's function.

For example, Lead V1 is placed in the 4th intercostal space at the right sternal border, and Lead V2 is placed in the 4th intercostal space at the left sternal border. The remaining leads, V3-V6, are placed sequentially in the intercostal spaces between V2 and V4.

By placing these leads on the chest, healthcare professionals can obtain valuable information about the heart's electrical activity and detect any abnormalities or signs of cardiac disease.