Relias Advanced Dysrhythmia
Exam A Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What rhythm is characterized by an irregularly irregular
ventricular response with no discernible P waves?
A. Atrial flutter
B. Atrial fibrillation
C. Sinus arrhythmia
D. Ventricular tachycardia
Answer: B
Rationale: Atrial fibrillation presents with chaotic atrial activity,
absent P waves, and irregularly irregular QRS intervals.
2. Which medication is first-line for stable supraventricular
tachycardia (SVT)?
A. Amiodarone
B. Adenosine
C. Lidocaine
D. Atropine
Answer: B
Rationale: Adenosine briefly blocks AV node conduction, terminating
most re-entrant SVTs.
,3. A patient has a ventricular rate of 40 bpm with regular rhythm
and visible P waves before each QRS. What rhythm is this?
A. Sinus bradycardia
B. Junctional escape rhythm
C. Third-degree AV block
D. Atrial fibrillation
Answer: A
Rationale: Sinus bradycardia is defined by normal conduction but
slow rate <60 bpm.
4. Which rhythm requires immediate defibrillation?
A. Asystole
B. Pulseless electrical activity
C. Ventricular fibrillation
D. Sinus tachycardia
Answer: C
Rationale: Ventricular fibrillation is a shockable rhythm requiring
immediate defibrillation.
5. Which ECG finding is most consistent with first-degree AV block?
A. Irregular rhythm
B. PR interval > 0.20 seconds
C. Absent P waves
D. Wide QRS complexes
Answer: B
Rationale: First-degree AV block is defined by prolonged PR interval
with 1:1 conduction.
, 6. What is the hallmark ECG finding of atrial flutter?
A. Irregular QRS complexes
B. Sawtooth flutter waves
C. Absent QRS complexes
D. Wide bizarre QRS complexes
Answer: B
Rationale: Atrial flutter produces characteristic sawtooth F waves.
7. Which rhythm is most commonly associated with hyperkalemia?
A. U waves
B. Peaked T waves
C. ST depression
D. Prolonged QT
Answer: B
Rationale: Hyperkalemia causes tall peaked T waves early in
progression.
8. A patient has no pulse and a flatline ECG. What is the correct
intervention?
A. Defibrillation
B. Cardioversion
C. CPR and epinephrine
D. Adenosine
Answer: C
Rationale: Asystole is non-shockable; CPR and epinephrine are
indicated.
9. Which rhythm originates from the AV node with absent or
inverted P waves?
Exam A Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What rhythm is characterized by an irregularly irregular
ventricular response with no discernible P waves?
A. Atrial flutter
B. Atrial fibrillation
C. Sinus arrhythmia
D. Ventricular tachycardia
Answer: B
Rationale: Atrial fibrillation presents with chaotic atrial activity,
absent P waves, and irregularly irregular QRS intervals.
2. Which medication is first-line for stable supraventricular
tachycardia (SVT)?
A. Amiodarone
B. Adenosine
C. Lidocaine
D. Atropine
Answer: B
Rationale: Adenosine briefly blocks AV node conduction, terminating
most re-entrant SVTs.
,3. A patient has a ventricular rate of 40 bpm with regular rhythm
and visible P waves before each QRS. What rhythm is this?
A. Sinus bradycardia
B. Junctional escape rhythm
C. Third-degree AV block
D. Atrial fibrillation
Answer: A
Rationale: Sinus bradycardia is defined by normal conduction but
slow rate <60 bpm.
4. Which rhythm requires immediate defibrillation?
A. Asystole
B. Pulseless electrical activity
C. Ventricular fibrillation
D. Sinus tachycardia
Answer: C
Rationale: Ventricular fibrillation is a shockable rhythm requiring
immediate defibrillation.
5. Which ECG finding is most consistent with first-degree AV block?
A. Irregular rhythm
B. PR interval > 0.20 seconds
C. Absent P waves
D. Wide QRS complexes
Answer: B
Rationale: First-degree AV block is defined by prolonged PR interval
with 1:1 conduction.
, 6. What is the hallmark ECG finding of atrial flutter?
A. Irregular QRS complexes
B. Sawtooth flutter waves
C. Absent QRS complexes
D. Wide bizarre QRS complexes
Answer: B
Rationale: Atrial flutter produces characteristic sawtooth F waves.
7. Which rhythm is most commonly associated with hyperkalemia?
A. U waves
B. Peaked T waves
C. ST depression
D. Prolonged QT
Answer: B
Rationale: Hyperkalemia causes tall peaked T waves early in
progression.
8. A patient has no pulse and a flatline ECG. What is the correct
intervention?
A. Defibrillation
B. Cardioversion
C. CPR and epinephrine
D. Adenosine
Answer: C
Rationale: Asystole is non-shockable; CPR and epinephrine are
indicated.
9. Which rhythm originates from the AV node with absent or
inverted P waves?
