EKG certification Certification FREE EKG Technician Certification Question and Answers 2

Question 1

Which lead placement corresponds to the V4 precordial lead position?

Accepted Answer

Fifth intercostal space, midclavicular line

Answer

V4 is correctly placed at the fifth intercostal space at the left midclavicular line, directly over the cardiac apex.

Question 2

What does a prolonged QT interval on an EKG most commonly indicate?

Accepted Answer

Increased risk of ventricular arrhythmias

Answer

A prolonged QT interval increases the risk of torsades de pointes and other dangerous ventricular arrhythmias.

Question 3

An EKG technician notices significant baseline wander on the tracing. What is the most likely cause?

Accepted Answer

Patient movement or respiratory artifact

Answer

Baseline wander is most commonly caused by patient movement, respirations, or loose electrodes shifting with body motion.

Question 4

In a 12-lead EKG, which leads are considered the inferior leads?

Accepted Answer

II, III, aVF

Answer

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

Question 5

What is the normal duration of the PR interval in an adult patient?

Accepted Answer

0.12 to 0.20 seconds

Answer

The normal PR interval ranges from 0.12 to 0.20 seconds, representing conduction from the atria through the AV node to the ventricles.

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