Relias Dysrhythmia Advanced A 2025/2026
Question Bank – 52 Actual Questions with
100% Verified Answers & Expert Rationales |
A+ Graded
Instructions: Select the best answer for each question or all that apply for SATA questions.
Each question includes a verified answer in blue and a detailed rationale aligned with the 2025
Relias Dysrhythmia Advanced A Exam blueprint, focusing on advanced cardiac dysrhythmia
recognition, ECG interpretation, heart blocks, pacemaker rhythms, and emergency interventions
for critical care settings.
Question 1
An ECG shows a regular rhythm with a rate of 110 bpm, P waves before each QRS, and a
PR interval of 0.16 seconds. What is the rhythm?
A. Sinus tachycardia
B. Atrial fibrillation
C. Ventricular tachycardia
D. Supraventricular tachycardia
Answer: A
Rationale: Sinus tachycardia is characterized by a regular rhythm, rate >100 bpm, P waves
before each QRS, and a normal PR interval (0.12–0.20 seconds). Atrial fibrillation (B) lacks P
waves and is irregular, ventricular tachycardia (C) has wide QRS complexes, and
supraventricular tachycardia (D) typically has a faster rate and hidden P waves.
Nursing Explanation: Assess for causes (e.g., fever, dehydration); treat underlying condition.
Question 2
An ECG strip shows no P waves, irregular QRS complexes, and a rate of 90 bpm. What is
the rhythm?
A. Sinus bradycardia
B. Atrial fibrillation
C. Ventricular fibrillation
D. Second-degree AV block
, Answer: B
Rationale: Atrial fibrillation is identified by absent P waves, irregular QRS complexes, and a
variable rate due to chaotic atrial activity. Sinus bradycardia (A) has P waves and a rate <60
bpm, ventricular fibrillation (C) is chaotic with no QRS, and second-degree AV block (D) shows
dropped QRS complexes.
Nursing Explanation: Initiate rate control (e.g., beta-blockers); assess for anticoagulation.
Question 3 (SATA)
Which characteristics identify ventricular tachycardia on an ECG?
A. Wide QRS complexes (>0.12 seconds)
B. Regular rhythm
C. P waves before each QRS
D. Rate typically >100 bpm
E. Irregular QRS intervals
Answer: A, B, D
Rationale: Ventricular tachycardia is characterized by wide QRS complexes (>0.12 seconds), a
regular rhythm, and a rate >100 bpm. P waves are typically absent or dissociated (not C), and
QRS intervals are regular (not E).
Nursing Explanation: Prepare for cardioversion or defibrillation; administer amiodarone.
Question 4
An ECG shows a regular rhythm, rate of 50 bpm, P waves before each QRS, and a PR
interval of 0.18 seconds. What is the rhythm?
A. Sinus bradycardia
B. Junctional rhythm
C. First-degree AV block
D. Atrial flutter
Answer: A
Rationale: Sinus bradycardia has a regular rhythm, rate <60 bpm, P waves before each QRS, and
a normal PR interval (0.12–0.20 seconds). Junctional rhythm (B) lacks P waves or has inverted P
waves, first-degree AV block (C) has a PR >0.20 seconds, and atrial flutter (D) shows sawtooth
waves.
Nursing Explanation: Assess for symptoms; consider atropine if symptomatic.
Question 5
Question Bank – 52 Actual Questions with
100% Verified Answers & Expert Rationales |
A+ Graded
Instructions: Select the best answer for each question or all that apply for SATA questions.
Each question includes a verified answer in blue and a detailed rationale aligned with the 2025
Relias Dysrhythmia Advanced A Exam blueprint, focusing on advanced cardiac dysrhythmia
recognition, ECG interpretation, heart blocks, pacemaker rhythms, and emergency interventions
for critical care settings.
Question 1
An ECG shows a regular rhythm with a rate of 110 bpm, P waves before each QRS, and a
PR interval of 0.16 seconds. What is the rhythm?
A. Sinus tachycardia
B. Atrial fibrillation
C. Ventricular tachycardia
D. Supraventricular tachycardia
Answer: A
Rationale: Sinus tachycardia is characterized by a regular rhythm, rate >100 bpm, P waves
before each QRS, and a normal PR interval (0.12–0.20 seconds). Atrial fibrillation (B) lacks P
waves and is irregular, ventricular tachycardia (C) has wide QRS complexes, and
supraventricular tachycardia (D) typically has a faster rate and hidden P waves.
Nursing Explanation: Assess for causes (e.g., fever, dehydration); treat underlying condition.
Question 2
An ECG strip shows no P waves, irregular QRS complexes, and a rate of 90 bpm. What is
the rhythm?
A. Sinus bradycardia
B. Atrial fibrillation
C. Ventricular fibrillation
D. Second-degree AV block
, Answer: B
Rationale: Atrial fibrillation is identified by absent P waves, irregular QRS complexes, and a
variable rate due to chaotic atrial activity. Sinus bradycardia (A) has P waves and a rate <60
bpm, ventricular fibrillation (C) is chaotic with no QRS, and second-degree AV block (D) shows
dropped QRS complexes.
Nursing Explanation: Initiate rate control (e.g., beta-blockers); assess for anticoagulation.
Question 3 (SATA)
Which characteristics identify ventricular tachycardia on an ECG?
A. Wide QRS complexes (>0.12 seconds)
B. Regular rhythm
C. P waves before each QRS
D. Rate typically >100 bpm
E. Irregular QRS intervals
Answer: A, B, D
Rationale: Ventricular tachycardia is characterized by wide QRS complexes (>0.12 seconds), a
regular rhythm, and a rate >100 bpm. P waves are typically absent or dissociated (not C), and
QRS intervals are regular (not E).
Nursing Explanation: Prepare for cardioversion or defibrillation; administer amiodarone.
Question 4
An ECG shows a regular rhythm, rate of 50 bpm, P waves before each QRS, and a PR
interval of 0.18 seconds. What is the rhythm?
A. Sinus bradycardia
B. Junctional rhythm
C. First-degree AV block
D. Atrial flutter
Answer: A
Rationale: Sinus bradycardia has a regular rhythm, rate <60 bpm, P waves before each QRS, and
a normal PR interval (0.12–0.20 seconds). Junctional rhythm (B) lacks P waves or has inverted P
waves, first-degree AV block (C) has a PR >0.20 seconds, and atrial flutter (D) shows sawtooth
waves.
Nursing Explanation: Assess for symptoms; consider atropine if symptomatic.
Question 5
