EKG certification Certification FREE EKG Certification Question and Answers 2 — Questions and Answers
Question 1: A patient's EKG shows a regular rhythm with a rate of 150 bpm, narrow QRS complexes, and no visible P waves. What is the most likely rhythm?
- Supraventricular tachycardia (Correct answer)
- Ventricular tachycardia
- Atrial fibrillation
- Sinus tachycardia
Correct answer: Supraventricular tachycardia
SVT typically presents with a regular narrow-complex tachycardia around 150 bpm with P waves buried in the QRS or T waves.
Question 2: Which EKG finding is most characteristic of hyperkalemia?
- Peaked T waves (Correct answer)
- Prolonged QT interval
- ST elevation
- Delta waves
Correct answer: Peaked T waves
Peaked, tall T waves are the earliest and most characteristic EKG manifestation of hyperkalemia.
Question 3: In a 12-lead EKG, ST elevation in leads II, III, and aVF indicates ischemia in which coronary artery territory?
- Right coronary artery (Correct answer)
- Left anterior descending
- Left circumflex
- Left main coronary artery
Correct answer: Right coronary artery
Leads II, III, and aVF reflect the inferior wall of the heart, which is most commonly supplied by the right coronary artery.
Question 4: What does a prolonged PR interval greater than 0.20 seconds on an EKG indicate?
- First-degree AV block (Correct answer)
- Second-degree AV block Type I
- Third-degree AV block
- Bundle branch block
Correct answer: First-degree AV block
A PR interval consistently greater than 0.20 seconds with all P waves conducted defines first-degree AV block.
Question 5: Which EKG lead is best for evaluating atrial rhythm and identifying P waves?
- Lead II (Correct answer)
- Lead aVR
- Lead V1
- Lead V6
Correct answer: Lead II
Lead II provides the best view of P waves because its axis is nearly parallel to the normal atrial depolarization vector.
Question 6: A wide QRS complex greater than 0.12 seconds with an RSR' pattern in lead V1 is characteristic of which condition?
- Right bundle branch block (Correct answer)
- Left bundle branch block
- Wolff-Parkinson-White syndrome
- Ventricular tachycardia
Correct answer: Right bundle branch block
RBBB classically shows a wide QRS with an RSR' (rabbit ears) pattern in lead V1 due to delayed right ventricular depolarization.
EKG certification Certification FREE EKG Certification Question and Answers 2
A patient's EKG shows a regular rhythm with a rate of 150 bpm, narrow QRS complexes, and no visible P waves.
What is the most likely rhythm?