Relias Advanced Dysrhythmia
Exam A Questions And
Correct Answers (Verified
Answers) Plus Rationales
2026/2027 Q&A | Instant
Download Pdf
1.
A rhythm shows regular R-R intervals, rate 78 bpm, P wave before
each QRS, PR interval 0.16 sec. What is the rhythm?
A. Atrial flutter
B. Junctional rhythm
C. Normal sinus rhythm
D. Sinus bradycardia
Answer: C. Normal sinus rhythm
Rationale: Rate 60–100 bpm, normal PR interval (0.12–0.20 sec), and
P before each QRS define normal sinus rhythm.
2.
A patient has a heart rate of 48 bpm with normal P waves preceding
each QRS. What rhythm is present?
A. Junctional rhythm
B. Sinus bradycardia
,C. Atrial fibrillation
D. Sinus arrhythmia
Answer: B. Sinus bradycardia
Rationale: Sinus rhythm with rate less than 60 bpm is sinus
bradycardia.
3.
Which rhythm is characterized by absence of P waves and irregularly
irregular rhythm?
A. Atrial flutter
B. Ventricular tachycardia
C. Atrial fibrillation
D. Junctional rhythm
Answer: C. Atrial fibrillation
Rationale: Atrial fibrillation shows no visible P waves and irregular
ventricular response.
4.
Sawtooth P waves are characteristic of:
A. Atrial fibrillation
B. Atrial flutter
C. Ventricular tachycardia
D. Sinus tachycardia
Answer: B. Atrial flutter
Rationale: Flutter waves create classic sawtooth appearance.
5.
,A rhythm shows premature wide QRS complexes without preceding
P waves. What is this?
A. PAC
B. PVC
C. Junctional beat
D. Escape beat
Answer: B. PVC
Rationale: Premature ventricular contractions produce wide QRS
without P waves.
6.
Three or more consecutive PVCs at a rate greater than 100 bpm
indicate:
A. Ventricular fibrillation
B. Ventricular tachycardia
C. Atrial flutter
D. Sinus tachycardia
Answer: B. Ventricular tachycardia
Rationale: VT is defined as ≥3 consecutive PVCs at rate >100 bpm.
7.
Which rhythm requires immediate defibrillation?
A. Sinus bradycardia
B. Atrial flutter
C. Ventricular fibrillation
D. Junctional rhythm
, Answer: C. Ventricular fibrillation
Rationale: VF is life-threatening and requires immediate
defibrillation.
8.
A chaotic rhythm with no identifiable QRS complexes is:
A. Ventricular tachycardia
B. Ventricular fibrillation
C. Atrial fibrillation
D. Torsades de pointes
Answer: B. Ventricular fibrillation
Rationale: VF appears chaotic without organized complexes.
9.
Which condition commonly causes Torsades de Pointes?
A. Short QT interval
B. Prolonged QT interval
C. Sinus tachycardia
D. Hypercalcemia
Answer: B. Prolonged QT interval
Rationale: Torsades is associated with prolonged QT interval.
10.
What electrolyte imbalance commonly causes peaked T waves?
A. Hypokalemia
B. Hyperkalemia
Exam A Questions And
Correct Answers (Verified
Answers) Plus Rationales
2026/2027 Q&A | Instant
Download Pdf
1.
A rhythm shows regular R-R intervals, rate 78 bpm, P wave before
each QRS, PR interval 0.16 sec. What is the rhythm?
A. Atrial flutter
B. Junctional rhythm
C. Normal sinus rhythm
D. Sinus bradycardia
Answer: C. Normal sinus rhythm
Rationale: Rate 60–100 bpm, normal PR interval (0.12–0.20 sec), and
P before each QRS define normal sinus rhythm.
2.
A patient has a heart rate of 48 bpm with normal P waves preceding
each QRS. What rhythm is present?
A. Junctional rhythm
B. Sinus bradycardia
,C. Atrial fibrillation
D. Sinus arrhythmia
Answer: B. Sinus bradycardia
Rationale: Sinus rhythm with rate less than 60 bpm is sinus
bradycardia.
3.
Which rhythm is characterized by absence of P waves and irregularly
irregular rhythm?
A. Atrial flutter
B. Ventricular tachycardia
C. Atrial fibrillation
D. Junctional rhythm
Answer: C. Atrial fibrillation
Rationale: Atrial fibrillation shows no visible P waves and irregular
ventricular response.
4.
Sawtooth P waves are characteristic of:
A. Atrial fibrillation
B. Atrial flutter
C. Ventricular tachycardia
D. Sinus tachycardia
Answer: B. Atrial flutter
Rationale: Flutter waves create classic sawtooth appearance.
5.
,A rhythm shows premature wide QRS complexes without preceding
P waves. What is this?
A. PAC
B. PVC
C. Junctional beat
D. Escape beat
Answer: B. PVC
Rationale: Premature ventricular contractions produce wide QRS
without P waves.
6.
Three or more consecutive PVCs at a rate greater than 100 bpm
indicate:
A. Ventricular fibrillation
B. Ventricular tachycardia
C. Atrial flutter
D. Sinus tachycardia
Answer: B. Ventricular tachycardia
Rationale: VT is defined as ≥3 consecutive PVCs at rate >100 bpm.
7.
Which rhythm requires immediate defibrillation?
A. Sinus bradycardia
B. Atrial flutter
C. Ventricular fibrillation
D. Junctional rhythm
, Answer: C. Ventricular fibrillation
Rationale: VF is life-threatening and requires immediate
defibrillation.
8.
A chaotic rhythm with no identifiable QRS complexes is:
A. Ventricular tachycardia
B. Ventricular fibrillation
C. Atrial fibrillation
D. Torsades de pointes
Answer: B. Ventricular fibrillation
Rationale: VF appears chaotic without organized complexes.
9.
Which condition commonly causes Torsades de Pointes?
A. Short QT interval
B. Prolonged QT interval
C. Sinus tachycardia
D. Hypercalcemia
Answer: B. Prolonged QT interval
Rationale: Torsades is associated with prolonged QT interval.
10.
What electrolyte imbalance commonly causes peaked T waves?
A. Hypokalemia
B. Hyperkalemia
