Question

In which of the following locations should a medical statement place the electrode for lead V4?

1) Right arm
2) Left arm
3) Right leg
4) Left leg

Answer 1

The V4 electrode of a 12-lead ECG should be placed on the left chest, specifically in the fifth intercostal space at the midclavicular line, not on any limb.

Step-by-step explanation:

The electrode for lead V4 in a standard 12-lead electrocardiogram (ECG) should be placed on the left chest. Specifically, V4 is positioned in the fifth intercostal space at the midclavicular line. This is part of the six electrodes placed on the chest area for a 12-lead ECG, with the other four electrodes positioned on the limbs. Lead V4 provides a view of the electrical activity of the heart particularly associated with the anterior myocardial region, which is important for diagnosing certain heart conditions. It is not placed on any of the limbs which are typically reserved for other leads like leads I, II, and III.​