Relias Dysrhythmia Basic A Exam Practice Test Actual
2025/2026 with Detailed Rationales | 100% Verified |
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SECTION 1: Normal Sinus Rhythm & Sinus Arrhythmias (6
Questions)
Q1: What is the normal PR interval duration in a healthy adult?
A. 0.04-0.08 seconds
B. 0.12-0.20 seconds
C. 0.20-0.30 seconds
D. 0.30-0.40 seconds
Correct Answer: B
Rationale: Correct because normal PR interval is 0.12-0.20 seconds (3-5 small
boxes).
Q2: A patient's EKG shows a heart rate of 52 bpm, regular rhythm, and normal P
waves preceding each QRS. What is the most likely rhythm?
A. Normal sinus rhythm
B. Sinus bradycardia
C. Sinus tachycardia
D. Sinus arrhythmia
Correct Answer: B
Rationale: Correct because sinus bradycardia is a regular rhythm with rate <60 bpm
and normal P waves.
Q3: A patient's EKG shows a heart rate of 120 bpm, regular rhythm, and normal P
waves before each QRS. What is the rhythm?
A. Normal sinus rhythm
B. Sinus bradycardia
C. Sinus tachycardia
D. Sinus arrhythmia
, Correct Answer: C
Rationale: Correct because sinus tachycardia is a regular rhythm with rate >100 bpm
and normal P waves.
Q4: A patient's EKG shows a heart rate of 110 bpm with a regular rhythm and normal
P waves. This is:
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial tachycardia
D. Junctional tachycardia
Correct Answer: A
Rationale: Correct because sinus tachycardia is >100 bpm with normal P waves.
Q5: Which of the following best describes sinus arrhythmia?
A. Regular rhythm with rate <60
B. Irregular rhythm that varies with respiration
C. Regular rhythm with rate >100
D. Irregular rhythm with no P waves
Correct Answer: B
Rationale: Correct because sinus arrhythmia is irregular and varies with respiration.
Q6: Which of the following is a cause of sinus tachycardia?
A. Hypothyroidism
B. Fever
C. Hypothermia
D. Beta-blocker overdose
Correct Answer: B
Rationale: Correct because fever is a common cause of sinus tachycardia.
SECTION 2: Atrial Dysrhythmias (PAC, A-Fib, A-Flutter, SVT) (10
Questions)
Q7: What is the characteristic EKG finding in atrial fibrillation?
A. Sawtooth flutter waves
B. Absent P waves with irregularly irregular QRS
2025/2026 with Detailed Rationales | 100% Verified |
Pass Guaranteed – A+ Graded
SECTION 1: Normal Sinus Rhythm & Sinus Arrhythmias (6
Questions)
Q1: What is the normal PR interval duration in a healthy adult?
A. 0.04-0.08 seconds
B. 0.12-0.20 seconds
C. 0.20-0.30 seconds
D. 0.30-0.40 seconds
Correct Answer: B
Rationale: Correct because normal PR interval is 0.12-0.20 seconds (3-5 small
boxes).
Q2: A patient's EKG shows a heart rate of 52 bpm, regular rhythm, and normal P
waves preceding each QRS. What is the most likely rhythm?
A. Normal sinus rhythm
B. Sinus bradycardia
C. Sinus tachycardia
D. Sinus arrhythmia
Correct Answer: B
Rationale: Correct because sinus bradycardia is a regular rhythm with rate <60 bpm
and normal P waves.
Q3: A patient's EKG shows a heart rate of 120 bpm, regular rhythm, and normal P
waves before each QRS. What is the rhythm?
A. Normal sinus rhythm
B. Sinus bradycardia
C. Sinus tachycardia
D. Sinus arrhythmia
, Correct Answer: C
Rationale: Correct because sinus tachycardia is a regular rhythm with rate >100 bpm
and normal P waves.
Q4: A patient's EKG shows a heart rate of 110 bpm with a regular rhythm and normal
P waves. This is:
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial tachycardia
D. Junctional tachycardia
Correct Answer: A
Rationale: Correct because sinus tachycardia is >100 bpm with normal P waves.
Q5: Which of the following best describes sinus arrhythmia?
A. Regular rhythm with rate <60
B. Irregular rhythm that varies with respiration
C. Regular rhythm with rate >100
D. Irregular rhythm with no P waves
Correct Answer: B
Rationale: Correct because sinus arrhythmia is irregular and varies with respiration.
Q6: Which of the following is a cause of sinus tachycardia?
A. Hypothyroidism
B. Fever
C. Hypothermia
D. Beta-blocker overdose
Correct Answer: B
Rationale: Correct because fever is a common cause of sinus tachycardia.
SECTION 2: Atrial Dysrhythmias (PAC, A-Fib, A-Flutter, SVT) (10
Questions)
Q7: What is the characteristic EKG finding in atrial fibrillation?
A. Sawtooth flutter waves
B. Absent P waves with irregularly irregular QRS
