EKG certification Certification EKG Electrode Placement & Lead Systems 2

Question 1

When performing a 12-lead EKG, where should the V4 electrode be placed?

Accepted Answer

Fifth intercostal space, midclavicular line

Answer

V4 is placed at the fifth intercostal space at the left midclavicular line.

Question 2

Which leads are considered the inferior leads on a 12-lead EKG?

Accepted Answer

II, III, and aVF

Answer

Leads II, III, and aVF view the inferior wall of the heart supplied by the right coronary artery.

Question 3

What is the correct limb electrode placement for a standard 12-lead EKG?

Accepted Answer

RA on right arm, LA on left arm, RL on right leg, LL on left leg

Answer

Standard placement uses RA on the right arm, LA on the left arm, RL on the right leg, and LL on the left leg.

Question 4

Lead aVR provides an electrical view of the heart from which perspective?

Accepted Answer

Right shoulder toward the heart

Answer

Lead aVR views the heart from the right shoulder perspective, looking at the right atrium and outflow tract.

Question 5

If the V1 and V2 electrodes are placed too high on the chest, what is the most likely effect on the EKG tracing?

Accepted Answer

Altered R-wave progression mimicking septal pathology

Answer

High placement of V1 and V2 can reduce R-wave amplitude and simulate anterior septal abnormalities.

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