EKG Rhythm interpretation assessment :
AMN Healthcare: KP Rhythm interpretation
(50 questions and Answers) 100% all correct |
Latest Fall 2026.
Course
EKG Rhythm interpretation
1. Which finding is most consistent with Normal Sinus Rhythm (NSR)?
A. Rate 40–60 bpm with absent P waves
B. Rate 60–100 bpm with regular rhythm and one P wave before each QRS
C. Rate above 150 bpm with wide QRS complexes
D. Irregular rhythm with no identifiable P waves
Answer: B. Rate 60–100 bpm with regular rhythm and one P wave before each QRS
Rationale: NSR generally has a regular rate of 60–100 bpm, upright consistent P waves
preceding each QRS, a PR interval of 0.12–0.20 seconds, and a narrow QRS.
2. What does the P wave represent on an ECG?
A. Ventricular depolarization
B. Ventricular repolarization
C. Atrial depolarization
D. Ventricular contraction
Answer: C. Atrial depolarization
Rationale: The P wave represents electrical activation, or depolarization, of the atria.
3. What does the QRS complex primarily represent?
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. SA-node recovery
Answer: B. Ventricular depolarization
Rationale: The QRS complex represents ventricular depolarization. Atrial repolarization occurs
at approximately the same time and is usually hidden within the QRS complex.
4. What does the T wave represent?
, A. Atrial depolarization
B. Ventricular depolarization
C. Ventricular repolarization
D. AV-node conduction
Answer: C. Ventricular repolarization
Rationale: The T wave represents ventricular repolarization, when ventricular myocardial cells
return toward their resting electrical state.
5. What is the normal PR interval?
A. 0.04–0.08 seconds
B. 0.08–0.10 seconds
C. 0.12–0.20 seconds
D. 0.20–0.30 seconds
Answer: C. 0.12–0.20 seconds
Rationale: A normal PR interval is approximately 0.12–0.20 seconds, measured from the
beginning of the P wave to the beginning of the QRS complex.
6. What is generally considered a normal QRS duration?
A. Less than 0.12 seconds
B. 0.12–0.20 seconds
C. 0.20–0.30 seconds
D. Greater than 0.30 seconds
Answer: A. Less than 0.12 seconds
Rationale: A normal ventricular conduction time produces a relatively narrow QRS, generally
less than 0.12 seconds.
7. A rhythm has a rate of 48 bpm, regular rhythm, normal P waves, a normal PR interval,
and narrow QRS complexes. Which rhythm is most likely?
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial fibrillation
D. Ventricular tachycardia
Answer: B. Sinus bradycardia
Rationale: Sinus bradycardia has the same basic sinus morphology as NSR but with a rate below
60 bpm.
8. Which condition can commonly produce sinus tachycardia?
AMN Healthcare: KP Rhythm interpretation
(50 questions and Answers) 100% all correct |
Latest Fall 2026.
Course
EKG Rhythm interpretation
1. Which finding is most consistent with Normal Sinus Rhythm (NSR)?
A. Rate 40–60 bpm with absent P waves
B. Rate 60–100 bpm with regular rhythm and one P wave before each QRS
C. Rate above 150 bpm with wide QRS complexes
D. Irregular rhythm with no identifiable P waves
Answer: B. Rate 60–100 bpm with regular rhythm and one P wave before each QRS
Rationale: NSR generally has a regular rate of 60–100 bpm, upright consistent P waves
preceding each QRS, a PR interval of 0.12–0.20 seconds, and a narrow QRS.
2. What does the P wave represent on an ECG?
A. Ventricular depolarization
B. Ventricular repolarization
C. Atrial depolarization
D. Ventricular contraction
Answer: C. Atrial depolarization
Rationale: The P wave represents electrical activation, or depolarization, of the atria.
3. What does the QRS complex primarily represent?
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. SA-node recovery
Answer: B. Ventricular depolarization
Rationale: The QRS complex represents ventricular depolarization. Atrial repolarization occurs
at approximately the same time and is usually hidden within the QRS complex.
4. What does the T wave represent?
, A. Atrial depolarization
B. Ventricular depolarization
C. Ventricular repolarization
D. AV-node conduction
Answer: C. Ventricular repolarization
Rationale: The T wave represents ventricular repolarization, when ventricular myocardial cells
return toward their resting electrical state.
5. What is the normal PR interval?
A. 0.04–0.08 seconds
B. 0.08–0.10 seconds
C. 0.12–0.20 seconds
D. 0.20–0.30 seconds
Answer: C. 0.12–0.20 seconds
Rationale: A normal PR interval is approximately 0.12–0.20 seconds, measured from the
beginning of the P wave to the beginning of the QRS complex.
6. What is generally considered a normal QRS duration?
A. Less than 0.12 seconds
B. 0.12–0.20 seconds
C. 0.20–0.30 seconds
D. Greater than 0.30 seconds
Answer: A. Less than 0.12 seconds
Rationale: A normal ventricular conduction time produces a relatively narrow QRS, generally
less than 0.12 seconds.
7. A rhythm has a rate of 48 bpm, regular rhythm, normal P waves, a normal PR interval,
and narrow QRS complexes. Which rhythm is most likely?
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial fibrillation
D. Ventricular tachycardia
Answer: B. Sinus bradycardia
Rationale: Sinus bradycardia has the same basic sinus morphology as NSR but with a rate below
60 bpm.
8. Which condition can commonly produce sinus tachycardia?
