EKG certification Certification FREE EKG Certification Interpretation Question and Answers 2 — Questions and Answers
Question 1: A patient's EKG shows a regular rhythm with sawtooth-shaped waves best seen in leads II, III, and aVF, with a ventricular rate of approximately 150 bpm. What is the most likely interpretation?
- Atrial fibrillation with rapid ventricular response
- Atrial flutter with 2:1 conduction (Correct answer)
- Supraventricular tachycardia
- Sinus tachycardia
Correct answer: Atrial flutter with 2:1 conduction
Sawtooth flutter waves at approximately 300 bpm with a 2:1 block produce a ventricular rate near 150 bpm, which is characteristic of atrial flutter.
Question 2: On a 12-lead EKG, ST elevation is noted in leads V1 through V4. Which coronary artery is most likely occluded?
- Right coronary artery
- Left circumflex artery
- Left anterior descending artery (Correct answer)
- Posterior descending artery
Correct answer: Left anterior descending artery
Leads V1-V4 correspond to the anterior wall of the heart, which is supplied by the left anterior descending artery.
Question 3: A rhythm strip shows an irregularly irregular rhythm with no discernible P waves and a narrow QRS complex. What is the correct interpretation?
- Multifocal atrial tachycardia
- Atrial fibrillation (Correct answer)
- Wandering atrial pacemaker
- Second-degree AV block Type I
Correct answer: Atrial fibrillation
An irregularly irregular rhythm with absent P waves and narrow QRS complexes is the hallmark of atrial fibrillation.
Question 4: Which EKG finding is most consistent with hyperkalemia?
- Prolonged QT interval
- Peaked T waves with widened QRS (Correct answer)
- U waves following T waves
- ST depression in lateral leads
Correct answer: Peaked T waves with widened QRS
Hyperkalemia classically produces tall, peaked T waves and progressive QRS widening as potassium levels rise.
Question 5: A patient presents with chest pain and the EKG shows ST elevation in leads II, III, and aVF with reciprocal ST depression in leads I and aVL. Which type of myocardial infarction does this indicate?
- Anterior MI
- Lateral MI
- Inferior MI (Correct answer)
- Posterior MI
Correct answer: Inferior MI
Leads II, III, and aVF reflect the inferior surface of the heart, and ST elevation in these leads with reciprocal changes confirms an inferior MI.
Question 6: What does a prolonged PR interval greater than 200 ms on an EKG indicate?
- Bundle branch block
- First-degree AV block (Correct answer)
- Second-degree AV block Type II
- Wolff-Parkinson-White syndrome
Correct answer: First-degree AV block
A PR interval consistently greater than 200 ms with every P wave followed by a QRS complex defines first-degree AV block.
EKG certification Certification FREE EKG Certification Interpretation Question and Answers 2
A patient's EKG shows a regular rhythm with sawtooth-shaped waves best seen in leads II, III, and aVF, with a ventricular rate of approximately 150 bpm.
What is the most likely interpretation?