EKG certification Certification EKG Electrode Placement & Lead Systems 1

Question 1

When placing precordial leads for a 12-lead EKG, where is the V1 electrode positioned?

Accepted Answer

Fourth intercostal space, right sternal border

Answer

Fourth intercostal space, left sternal border

Answer

Fifth intercostal space, midclavicular line

Answer

Second intercostal space, right sternal border

Question 2

Which precordial leads are classified as the lateral leads on a standard 12-lead EKG?

Accepted Answer

V5 and V6

Answer

V1 and V2

Answer

V3 and V4

Answer

V4 and V5

Question 3

Where is the V6 electrode correctly placed during a 12-lead EKG?

Accepted Answer

Midaxillary line at the fifth intercostal space

Answer

Anterior axillary line at the fifth intercostal space

Answer

Posterior axillary line at the fourth intercostal space

Answer

Midclavicular line at the fifth intercostal space

Question 4

In a standard 12-lead EKG, which lead is formed by the combination of leads I and III and does NOT require a separate electrode?

Accepted Answer

aVF

Answer

aVR

Answer

aVL

Answer

Lead II

Question 5

A technician places the right leg electrode during a 12-lead EKG. What is the primary function of this electrode?

Accepted Answer

It acts as an electrical ground to reduce interference

Answer

It records the inferior wall of the heart

Answer

It serves as the positive pole for Lead II

Answer

It creates the reference point for aVF

Question 6

Which group of leads on a 12-lead EKG is best used to detect ischemia or injury to the anterior wall of the left ventricle?

Accepted Answer

V1, V2, V3, and V4

Answer

II, III, and aVF

Answer

I, aVL, V5, and V6

Answer

aVR and V1