EKG certification Certification FREE ECG Technician Certification Exam Question and Answers 2 — Questions and Answers
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?
- First-degree AV block (Correct answer)
- Second-degree AV block Type I
- Second-degree AV block Type II
- Third-degree AV block
Correct answer: First-degree AV block
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?
- Lead V1 (Correct answer)
- Lead V5
- Lead aVL
- Lead II
Correct answer: Lead V1
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?
- Leads I and aVL (Correct answer)
- Leads II and III
- Leads V1 and V2
- Leads V5 and V6
Correct answer: Leads I and aVL
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?
- Ventricular conduction delay or bundle branch block (Correct answer)
- Atrial enlargement
- First-degree AV block
- Normal sinus rhythm variant
Correct answer: Ventricular conduction delay or bundle branch block
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?
- Right coronary artery (Correct answer)
- Left anterior descending artery
- Left circumflex artery
- Left main coronary artery
Correct answer: Right coronary artery
Leads II, III, and aVF reflect the inferior wall of the heart, which is typically supplied by the right coronary artery.
Question 6: What is the correct placement for precordial lead V4?
- Fifth intercostal space at the midclavicular line (Correct answer)
- Fourth intercostal space at the left sternal border
- Fifth intercostal space at the anterior axillary line
- Fourth intercostal space at the right sternal border
Correct answer: Fifth intercostal space at the midclavicular line
V4 is placed at the fifth intercostal space at the midclavicular line on the left side of the chest.
EKG certification Certification FREE ECG Technician Certification Exam Question and Answers 2
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?