Relias Dysrhythmia Basic A Practice 2026 Exam with
Test Questions & Correct key Answers well
Elaborated Rationales \Final Review Exam
Relias Dysrhythmia Basic A Practice Exam Question 1: Sinus Rhythm
Which finding is characteristic of normal sinus rhythm?
A. Rate 40-60, no P waves
B. Rate 60-100, regular, P before every QRS
C. Rate 100-150, sawtooth waves
D. Irregularly irregular, no P waves
Correct Answer: B. Rate 60-100, regular, P before every QRS
Rationale: Normal sinus rhythm has a regular rate of 60-100 bpm,
upright P waves before each QRS, PR 0.12-0.20 seconds, and QRS less
than 0.12 seconds.
Relias Dysrhythmia Basic A Practice Exam Question 2: Sinus Bradycardia
Which rhythm has a sinus pattern with a rate below 60 bpm?
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial flutter
D. Junctional tachycardia
Correct Answer: B. Sinus bradycardia
,Rationale: Sinus bradycardia has normal sinus P waves and a regular
ventricular rate less than 60 bpm.
Relias Dysrhythmia Basic A Practice Exam Question 3: Sinus Tachycardia
Which rhythm has a sinus pattern with a rate above 100 bpm?
A. Sinus bradycardia
B. Sinus arrhythmia
C. Sinus tachycardia
D. First-degree AV block
Correct Answer: C. Sinus tachycardia
Rationale: Sinus tachycardia has a regular sinus rhythm with a rate
greater than 100 bpm.
Relias Dysrhythmia Basic A Practice Exam Question 4: Sinus Arrhythmia
Which description best fits sinus arrhythmia?
A. Irregular sinus rhythm with phasic PP interval changes
B. Regular rhythm with sawtooth atrial waves
C. No P waves and irregular ventricular response
D. Wide QRS with no atrial activity
Correct Answer: A. Irregular sinus rhythm with phasic PP interval
changes
Rationale: Sinus arrhythmia is a sinus rhythm with beat-to-beat
variability, often related to respiration.
,Relias Dysrhythmia Basic A Practice Exam Question 5: Sinus Arrest
What occurs during sinus arrest?
A. A pause that is a multiple of the PP interval
B. A pause with no P wave or QRS, not a multiple of the PP interval
C. Progressive PR prolongation until a QRS is dropped
D. Constant PR with sudden dropped QRS
Correct Answer: B. A pause with no P wave or QRS, not a multiple of
the PP interval
Rationale: Sinus arrest is failure of the SA node to fire, causing a pause
that is not an exact multiple of the previous PP interval.
Relias Dysrhythmia Basic A Practice Exam Question 6: Sinoatrial Block
What occurs during a sinoatrial block?
A. A pause that is a multiple of the PP interval
B. Irregularly irregular ventricular response
C. Progressive PR lengthening
D. No relationship between P waves and QRS complexes
Correct Answer: A. A pause that is a multiple of the PP interval
Rationale: SA block causes a pause that is an exact multiple of the
underlying PP interval because the impulse is blocked leaving the SA
node.
, Relias Dysrhythmia Basic A Practice Exam Question 7: Premature Atrial
Contraction
Which finding identifies a premature atrial contraction?
A. Wide premature QRS without a P wave
B. Premature P wave with a narrow QRS
C. Sawtooth atrial waves
D. Complete AV dissociation
Correct Answer: B. Premature P wave with a narrow QRS
Rationale: A PAC is an early atrial beat with an abnormal P wave and
usually a narrow QRS unless there is underlying bundle branch block.
Relias Dysrhythmia Basic A Practice Exam Question 8: Wandering Atrial
Pacemaker
Which rhythm has changing P wave morphology and a rate below 100
bpm?
A. Multifocal atrial tachycardia
B. Wandering atrial pacemaker
C. Atrial flutter
D. Junctional rhythm
Correct Answer: B. Wandering atrial pacemaker
Rationale: Wandering atrial pacemaker has at least three P wave
shapes with a rate less than 100 bpm.
Test Questions & Correct key Answers well
Elaborated Rationales \Final Review Exam
Relias Dysrhythmia Basic A Practice Exam Question 1: Sinus Rhythm
Which finding is characteristic of normal sinus rhythm?
A. Rate 40-60, no P waves
B. Rate 60-100, regular, P before every QRS
C. Rate 100-150, sawtooth waves
D. Irregularly irregular, no P waves
Correct Answer: B. Rate 60-100, regular, P before every QRS
Rationale: Normal sinus rhythm has a regular rate of 60-100 bpm,
upright P waves before each QRS, PR 0.12-0.20 seconds, and QRS less
than 0.12 seconds.
Relias Dysrhythmia Basic A Practice Exam Question 2: Sinus Bradycardia
Which rhythm has a sinus pattern with a rate below 60 bpm?
A. Sinus tachycardia
B. Sinus bradycardia
C. Atrial flutter
D. Junctional tachycardia
Correct Answer: B. Sinus bradycardia
,Rationale: Sinus bradycardia has normal sinus P waves and a regular
ventricular rate less than 60 bpm.
Relias Dysrhythmia Basic A Practice Exam Question 3: Sinus Tachycardia
Which rhythm has a sinus pattern with a rate above 100 bpm?
A. Sinus bradycardia
B. Sinus arrhythmia
C. Sinus tachycardia
D. First-degree AV block
Correct Answer: C. Sinus tachycardia
Rationale: Sinus tachycardia has a regular sinus rhythm with a rate
greater than 100 bpm.
Relias Dysrhythmia Basic A Practice Exam Question 4: Sinus Arrhythmia
Which description best fits sinus arrhythmia?
A. Irregular sinus rhythm with phasic PP interval changes
B. Regular rhythm with sawtooth atrial waves
C. No P waves and irregular ventricular response
D. Wide QRS with no atrial activity
Correct Answer: A. Irregular sinus rhythm with phasic PP interval
changes
Rationale: Sinus arrhythmia is a sinus rhythm with beat-to-beat
variability, often related to respiration.
,Relias Dysrhythmia Basic A Practice Exam Question 5: Sinus Arrest
What occurs during sinus arrest?
A. A pause that is a multiple of the PP interval
B. A pause with no P wave or QRS, not a multiple of the PP interval
C. Progressive PR prolongation until a QRS is dropped
D. Constant PR with sudden dropped QRS
Correct Answer: B. A pause with no P wave or QRS, not a multiple of
the PP interval
Rationale: Sinus arrest is failure of the SA node to fire, causing a pause
that is not an exact multiple of the previous PP interval.
Relias Dysrhythmia Basic A Practice Exam Question 6: Sinoatrial Block
What occurs during a sinoatrial block?
A. A pause that is a multiple of the PP interval
B. Irregularly irregular ventricular response
C. Progressive PR lengthening
D. No relationship between P waves and QRS complexes
Correct Answer: A. A pause that is a multiple of the PP interval
Rationale: SA block causes a pause that is an exact multiple of the
underlying PP interval because the impulse is blocked leaving the SA
node.
, Relias Dysrhythmia Basic A Practice Exam Question 7: Premature Atrial
Contraction
Which finding identifies a premature atrial contraction?
A. Wide premature QRS without a P wave
B. Premature P wave with a narrow QRS
C. Sawtooth atrial waves
D. Complete AV dissociation
Correct Answer: B. Premature P wave with a narrow QRS
Rationale: A PAC is an early atrial beat with an abnormal P wave and
usually a narrow QRS unless there is underlying bundle branch block.
Relias Dysrhythmia Basic A Practice Exam Question 8: Wandering Atrial
Pacemaker
Which rhythm has changing P wave morphology and a rate below 100
bpm?
A. Multifocal atrial tachycardia
B. Wandering atrial pacemaker
C. Atrial flutter
D. Junctional rhythm
Correct Answer: B. Wandering atrial pacemaker
Rationale: Wandering atrial pacemaker has at least three P wave
shapes with a rate less than 100 bpm.
