EKG certification Certification FREE ECG Technician Certification Exam Question and Answers 2

Question 1

A patient's ECG shows a PR interval of 0.28 seconds with consistent P-wave to QRS conduction. What is the most likely interpretation?

Accepted Answer

First-degree AV block

Answer

A PR interval greater than 0.20 seconds with consistent conduction indicates first-degree AV block.

Question 2

Which ECG lead is best for evaluating right ventricular hypertrophy?

Accepted Answer

Lead V1

Answer

Lead V1 is positioned over the right ventricle and best demonstrates right ventricular hypertrophy with tall R waves.

Question 3

During a 12-lead ECG recording, the patient develops muscle tremors in the left arm. Which leads will most likely show artifact?

Accepted Answer

Leads I and aVL

Answer

The left arm electrode contributes to leads I and aVL, so tremor artifact will primarily affect those leads.

Question 4

What does a widened QRS complex greater than 0.12 seconds typically indicate?

Accepted Answer

Ventricular conduction delay or bundle branch block

Answer

A QRS duration exceeding 0.12 seconds indicates abnormal ventricular conduction, most commonly a bundle branch block.

Question 5

An ECG technician notices ST elevation in leads II, III, and aVF. Which coronary artery territory does this suggest?

Accepted Answer

Right coronary artery

Answer

Leads II, III, and aVF reflect the inferior wall of the heart, which is typically supplied by the right coronary artery.

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