Relias Advanced Dysrhythmia Exam A Questions
and answers|latest update 2026|already graded
A+
Q1. A 72-year-old presents with HR 110, regular rhythm,
normal QRS, P wave before every QRS, PR 0.16 sec.
What is the rhythm?
A) Sinus bradycardia
B) Sinus tachycardia
C) Atrial fibrillation
D) Atrial flutter
Answer: B
Rationale: Rate >100 with normal conduction and 1:1
P:QRS defines sinus tachycardia.
Q2. Rhythm: HR 52, regular, P wave before each QRS,
PR 0.20 sec, QRS 0.08 sec.
A) Sinus arrhythmia
B) Sinus bradycardia
1
,C) Junctional rhythm
D) First-degree AV block
Answer: B
Rationale: Rate <60 with normal conduction; sinus
bradycardia.
Q3. No P waves, irregularly irregular ventricular
response, QRS normal, HR 110–140.
A) Atrial flutter
B) Multifocal atrial tachycardia
C) Atrial fibrillation
D) Sinus tachycardia with PACs
Answer: C
Rationale: Absent P waves with chaotic baseline and
irregular R-R intervals = atrial fibrillation.
Q4. Sawtooth flutter waves at 300 bpm, 2:1 AV
conduction, ventricular rate 150.
A) Atrial fibrillation
B) Atrial flutter
2
,C) AVNRT
D) Sinus tachycardia
Answer: B
Rationale: Classic flutter waves (sawtooth) in II, III, aVF;
2:1 block common.
Q5. Rhythm: sudden onset of HR 160, regular, narrow
QRS, P wave hidden in T wave.
A) Sinus tachycardia
B) Atrial flutter
C) AV nodal reentrant tachycardia (AVNRT)
D) Ventricular tachycardia
Answer: C
Rationale: Regular narrow complex tachycardia without
visible P waves; P’ often retrograde in ST-T.
Q6. Premature beat with abnormal P’ wave, narrow QRS,
incomplete compensatory pause.
A) PVC
B) PJC
3
, C) Atrial premature complex (APC)
D) Sinus pause
Answer: C
Rationale: Early P’ different from sinus; narrow QRS;
incomplete pause due to sinus node reset.
Q7. Run of 4 consecutive narrow QRS beats at HR 150,
start/stop abruptly, P’ visible after QRS.
A) Atrial tachycardia
B) Sinus tachycardia
C) Junctional tachycardia
D) Atrial flutter with 2:1
Answer: A
Rationale: Sustained atrial focus >100 bpm; P’
morphology differs from sinus.
Q8. Rhythm: HR 80, but every 3rd beat is a PAC with
wide QRS (aberrancy).
A) Ventricular bigeminy
B) Atrial trigeminy with aberrancy
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and answers|latest update 2026|already graded
A+
Q1. A 72-year-old presents with HR 110, regular rhythm,
normal QRS, P wave before every QRS, PR 0.16 sec.
What is the rhythm?
A) Sinus bradycardia
B) Sinus tachycardia
C) Atrial fibrillation
D) Atrial flutter
Answer: B
Rationale: Rate >100 with normal conduction and 1:1
P:QRS defines sinus tachycardia.
Q2. Rhythm: HR 52, regular, P wave before each QRS,
PR 0.20 sec, QRS 0.08 sec.
A) Sinus arrhythmia
B) Sinus bradycardia
1
,C) Junctional rhythm
D) First-degree AV block
Answer: B
Rationale: Rate <60 with normal conduction; sinus
bradycardia.
Q3. No P waves, irregularly irregular ventricular
response, QRS normal, HR 110–140.
A) Atrial flutter
B) Multifocal atrial tachycardia
C) Atrial fibrillation
D) Sinus tachycardia with PACs
Answer: C
Rationale: Absent P waves with chaotic baseline and
irregular R-R intervals = atrial fibrillation.
Q4. Sawtooth flutter waves at 300 bpm, 2:1 AV
conduction, ventricular rate 150.
A) Atrial fibrillation
B) Atrial flutter
2
,C) AVNRT
D) Sinus tachycardia
Answer: B
Rationale: Classic flutter waves (sawtooth) in II, III, aVF;
2:1 block common.
Q5. Rhythm: sudden onset of HR 160, regular, narrow
QRS, P wave hidden in T wave.
A) Sinus tachycardia
B) Atrial flutter
C) AV nodal reentrant tachycardia (AVNRT)
D) Ventricular tachycardia
Answer: C
Rationale: Regular narrow complex tachycardia without
visible P waves; P’ often retrograde in ST-T.
Q6. Premature beat with abnormal P’ wave, narrow QRS,
incomplete compensatory pause.
A) PVC
B) PJC
3
, C) Atrial premature complex (APC)
D) Sinus pause
Answer: C
Rationale: Early P’ different from sinus; narrow QRS;
incomplete pause due to sinus node reset.
Q7. Run of 4 consecutive narrow QRS beats at HR 150,
start/stop abruptly, P’ visible after QRS.
A) Atrial tachycardia
B) Sinus tachycardia
C) Junctional tachycardia
D) Atrial flutter with 2:1
Answer: A
Rationale: Sustained atrial focus >100 bpm; P’
morphology differs from sinus.
Q8. Rhythm: HR 80, but every 3rd beat is a PAC with
wide QRS (aberrancy).
A) Ventricular bigeminy
B) Atrial trigeminy with aberrancy
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