Relias Dysrhythmia Basic Practice Exam ECG Rhythm
Interpretation • Cardiac Monitoring • Arrhythmia
Recognition Nursing Review & Certification
Preparation
Question 1 of 35
[ECG description: regular rhythm; rate 78; P before every QRS; PR 0.16 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Sinus bradycardia
B. First-degree AV block
C. Normal sinus rhythm
D. Junctional rhythm
Answer: C
Rationale: Rate and intervals are normal with 1:1 P-to-QRS relationship, consistent with
normal sinus rhythm.
Question 2 of 35
[ECG description: regular rhythm; rate 48; P before each QRS; PR 0.18 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Sinus bradycardia
B. Ventricular escape rhythm
C. Atrial fibrillation
,D. Sinus tachycardia
Answer: A
Rationale: Sinus origin with rate <60 and otherwise normal morphology = sinus
bradycardia.
Question 3 of 35
[ECG description: regular rhythm; rate 128; P before each QRS; PR 0.14 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Atrial flutter
B. Sinus tachycardia
C. SVT (supraventricular tachycardia)
D. Ventricular tachycardia
Answer: B
Rationale: P waves present with normal PR and rate >100 indicates sinus tachycardia.
Question 4 of 35
[ECG description: irregularly irregular rhythm; no distinct P waves; narrow QRS; ventricular
rate ~90]
What is the cardiac rhythm?
A. Atrial fibrillation with controlled ventricular response
B. Atrial flutter with variable block
C. Multifocal atrial tachycardia
, D. Sinus arrhythmia
Answer: A
Rationale: Irregularly irregular rhythm without P waves is characteristic of atrial fibrillation.
Question 5 of 35
[ECG description: saw-tooth atrial waves at ~300/min with regular QRS every 4th flutter;
ventricular rate ~75]
What is the cardiac rhythm?
A. Atrial fibrillation
B. Atrial flutter with 4:1 conduction
C. SVT
D. Ventricular tachycardia
Answer: B
Rationale: Distinct flutter waves and consistent conduction ratio (4:1) indicate atrial flutter.
Question 6 of 35
[ECG description: sinus rhythm; PR interval 0.24 s (prolonged) constant; QRS narrow]
What is the cardiac rhythm?
A. Second-degree AV block type I
B. First-degree AV block
C. Third-degree AV block
D. Normal sinus rhythm
Interpretation • Cardiac Monitoring • Arrhythmia
Recognition Nursing Review & Certification
Preparation
Question 1 of 35
[ECG description: regular rhythm; rate 78; P before every QRS; PR 0.16 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Sinus bradycardia
B. First-degree AV block
C. Normal sinus rhythm
D. Junctional rhythm
Answer: C
Rationale: Rate and intervals are normal with 1:1 P-to-QRS relationship, consistent with
normal sinus rhythm.
Question 2 of 35
[ECG description: regular rhythm; rate 48; P before each QRS; PR 0.18 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Sinus bradycardia
B. Ventricular escape rhythm
C. Atrial fibrillation
,D. Sinus tachycardia
Answer: A
Rationale: Sinus origin with rate <60 and otherwise normal morphology = sinus
bradycardia.
Question 3 of 35
[ECG description: regular rhythm; rate 128; P before each QRS; PR 0.14 s; QRS 0.08 s]
What is the cardiac rhythm?
A. Atrial flutter
B. Sinus tachycardia
C. SVT (supraventricular tachycardia)
D. Ventricular tachycardia
Answer: B
Rationale: P waves present with normal PR and rate >100 indicates sinus tachycardia.
Question 4 of 35
[ECG description: irregularly irregular rhythm; no distinct P waves; narrow QRS; ventricular
rate ~90]
What is the cardiac rhythm?
A. Atrial fibrillation with controlled ventricular response
B. Atrial flutter with variable block
C. Multifocal atrial tachycardia
, D. Sinus arrhythmia
Answer: A
Rationale: Irregularly irregular rhythm without P waves is characteristic of atrial fibrillation.
Question 5 of 35
[ECG description: saw-tooth atrial waves at ~300/min with regular QRS every 4th flutter;
ventricular rate ~75]
What is the cardiac rhythm?
A. Atrial fibrillation
B. Atrial flutter with 4:1 conduction
C. SVT
D. Ventricular tachycardia
Answer: B
Rationale: Distinct flutter waves and consistent conduction ratio (4:1) indicate atrial flutter.
Question 6 of 35
[ECG description: sinus rhythm; PR interval 0.24 s (prolonged) constant; QRS narrow]
What is the cardiac rhythm?
A. Second-degree AV block type I
B. First-degree AV block
C. Third-degree AV block
D. Normal sinus rhythm
