EKG certification Certification FREE EKG Certification Trivia Question and Answers 2 — Questions and Answers
Question 1: Which EKG finding is characterized by a shortened PR interval and a delta wave?
- Wolff-Parkinson-White syndrome (Correct answer)
- First-degree AV block
- Bundle branch block
- Atrial flutter
Correct answer: Wolff-Parkinson-White syndrome
WPW syndrome features a short PR interval, delta wave, and widened QRS due to an accessory pathway.
Question 2: What is the normal duration of the QRS complex?
- 0.06–0.10 seconds (Correct answer)
- 0.12–0.20 seconds
- 0.20–0.30 seconds
- 0.30–0.40 seconds
Correct answer: 0.06–0.10 seconds
A normal QRS complex lasts 0.06 to 0.10 seconds, representing ventricular depolarization.
Question 3: An EKG shows absent P waves with an irregularly irregular rhythm. What is the most likely interpretation?
- Atrial fibrillation (Correct answer)
- Ventricular tachycardia
- Sinus arrhythmia
- Atrial flutter
Correct answer: Atrial fibrillation
Atrial fibrillation is defined by absent P waves replaced by fibrillatory waves and an irregularly irregular ventricular response.
Question 4: Which lead is best for evaluating right ventricular hypertrophy on a 12-lead EKG?
- V1 (Correct answer)
- Lead II
- V5
- aVL
Correct answer: V1
Lead V1 sits over the right ventricle and shows tall R waves when right ventricular hypertrophy is present.
Question 5: What does a prolonged QT interval increase the risk of?
- Torsades de pointes (Correct answer)
- Atrial fibrillation
- First-degree AV block
- Sinus bradycardia
Correct answer: Torsades de pointes
A prolonged QT interval predisposes to torsades de pointes, a polymorphic ventricular tachycardia that can degenerate into ventricular fibrillation.
Question 6: On an EKG rhythm strip, each small box on the horizontal axis represents how many seconds?
- 0.04 seconds (Correct answer)
- 0.10 seconds
- 0.20 seconds
- 0.02 seconds
Correct answer: 0.04 seconds
At standard paper speed of 25 mm/s, each 1 mm small box equals 0.04 seconds.
EKG certification Certification FREE EKG Certification Trivia Question and Answers 2
Which EKG finding is characterized by a shortened PR interval and a delta wave?