ADVANCED RELIAS DYSRHYTHMIAS 2026
EXAM B PREP COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS|GUARANTEED PASS.
RELIAS
Prepare for the Advanced Relias Dysrhythmias Exam B with practice
questions covering advanced ECG interpretation, cardiac arrhythmias,
interval measurements, conduction disorders, rhythm analysis, and
emergency cardiac response concepts. This study guide helps
reinforce essential electrocardiography knowledge and supports
effective exam preparation. Designed to improve rhythm recognition
skills and boost confidence in advanced cardiac patient care. Suitable
for nursing, telemetry, and healthcare professionals.
MULTIPLE CHOICE.
Core Measurement & Rhythm Identification (1-50)
Q1. A patient has a heart rate of 42 bpm. The P wave precedes every QRS, the PR
interval is 0.20 seconds, and the QRS is 0.10 seconds. What is the rhythm?
A. Sinus bradycardia
B. First-degree AV block
C. Junctional rhythm
D. Sinus arrhythmia
Answer: A. Sinus bradycardia
RATIONALE: Sinus bradycardia criteria: Rate <60 bpm, normal P wave morphology,
normal PR (0.12-0.20 sec) and QRS (<0.12 sec) intervals. First-degree AV block would
have PR >0.20 sec. Junctional rhythm would have no P wave or inverted P wave.
,Q2. Which of the following defines a normal PR interval?
A. 0.06–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. 0.35–0.44 sec
Answer: B. 0.12–0.20 sec
RATIONALE: The PR interval represents atrial depolarization to ventricular
depolarization (AV conduction time). Prolonged >0.20 sec suggests a first-degree AV
block.
Q3. A rhythm strip shows absent P waves, a ventricular rate of 48 bpm, narrow
QRS (0.08 sec), and irregular rhythm. What is the most likely rhythm?
,A. Atrial fibrillation
B. Junctional escape rhythm
C. Idioventricular rhythm
D. Sinus pause
Answer: B. Junctional escape rhythm
RATIONALE: Absent P waves + narrow QRS + rate 40–60 bpm = Junctional rhythm.
Idioventricular rhythm has a wide QRS (>0.12 sec). Atrial fibrillation has an irregularly
irregular rhythm but no discernible P waves and typically a faster rate.
Q4. What is the QT interval corrected (QTc) if the QT is 0.44 sec and the RR interval
is 0.80 sec?
A. 0.44 sec
B. 0.49 sec
C. 0.38 sec
D. 0.52 sec
Answer: B. 0.49 sec
RATIONALE: Bazett's formula: QTc = QT / √(RR). RR 0.80 → √0.80 = 0.894; 0..894
= 0.492 sec. Normal QTc ≤0.44 sec in males, ≤0.46 in females.
Q5. A patient with a wide QRS (0.14 sec), monomorphic appearance, rate 160 bpm,
and no visible P waves. What is the rhythm?
A. Atrial flutter
B. Ventricular tachycardia
C. SVT with aberrancy
D. Wolff-Parkinson-White
Answer: B. Ventricular tachycardia
RATIONALE: A wide QRS tachycardia (>0.12 sec) at a rate >100 bpm with no visible P
waves is ventricular tachycardia (VT) until proven otherwise. Monomorphic VT suggests
a single irritable focus in the ventricle.
, Q6. A 6-second strip shows 8 QRS complexes. What is the heart rate?
A. 60 bpm
B. 70 bpm
C. 80 bpm
D. 90 bpm
Answer: C. 80 bpm
RATIONALE: For irregular rhythms: Count the QRS complexes in a 6-second strip (30
large boxes) and multiply by 10. 8 × 10 = 80 bpm.
Q7. Identify the rhythm: Regular R-R intervals, sawtooth flutter waves at 300 bpm,
and 2:1 conduction. Ventricular rate is 150 bpm.
A. Atrial fibrillation
B. Atrial flutter
C. Sinus tachycardia
D. MAT
Answer: B. Atrial flutter
RATIONALE: Sawtooth flutter waves (F waves) at ~250-350 bpm with variable AV
conduction. 2:1 block gives a ventricular rate ~150. It is often regular.
Q8. A patient has a regular wide complex tachycardia at 210 bpm. They are
hypotensive and confused. Next step?
A. Adenosine 6 mg IV
B. Synchronized cardioversion
C. Amiodarone 300 mg IV
D. Lidocaine 100 mg IV
Answer: B. Synchronized cardioversion
RATIONALE: Unstable tachyarrhythmia with altered mental status → immediate
synchronized cardioversion (start 100-200J biphasic). Do not delay for medication.
EXAM B PREP COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS|GUARANTEED PASS.
RELIAS
Prepare for the Advanced Relias Dysrhythmias Exam B with practice
questions covering advanced ECG interpretation, cardiac arrhythmias,
interval measurements, conduction disorders, rhythm analysis, and
emergency cardiac response concepts. This study guide helps
reinforce essential electrocardiography knowledge and supports
effective exam preparation. Designed to improve rhythm recognition
skills and boost confidence in advanced cardiac patient care. Suitable
for nursing, telemetry, and healthcare professionals.
MULTIPLE CHOICE.
Core Measurement & Rhythm Identification (1-50)
Q1. A patient has a heart rate of 42 bpm. The P wave precedes every QRS, the PR
interval is 0.20 seconds, and the QRS is 0.10 seconds. What is the rhythm?
A. Sinus bradycardia
B. First-degree AV block
C. Junctional rhythm
D. Sinus arrhythmia
Answer: A. Sinus bradycardia
RATIONALE: Sinus bradycardia criteria: Rate <60 bpm, normal P wave morphology,
normal PR (0.12-0.20 sec) and QRS (<0.12 sec) intervals. First-degree AV block would
have PR >0.20 sec. Junctional rhythm would have no P wave or inverted P wave.
,Q2. Which of the following defines a normal PR interval?
A. 0.06–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. 0.35–0.44 sec
Answer: B. 0.12–0.20 sec
RATIONALE: The PR interval represents atrial depolarization to ventricular
depolarization (AV conduction time). Prolonged >0.20 sec suggests a first-degree AV
block.
Q3. A rhythm strip shows absent P waves, a ventricular rate of 48 bpm, narrow
QRS (0.08 sec), and irregular rhythm. What is the most likely rhythm?
,A. Atrial fibrillation
B. Junctional escape rhythm
C. Idioventricular rhythm
D. Sinus pause
Answer: B. Junctional escape rhythm
RATIONALE: Absent P waves + narrow QRS + rate 40–60 bpm = Junctional rhythm.
Idioventricular rhythm has a wide QRS (>0.12 sec). Atrial fibrillation has an irregularly
irregular rhythm but no discernible P waves and typically a faster rate.
Q4. What is the QT interval corrected (QTc) if the QT is 0.44 sec and the RR interval
is 0.80 sec?
A. 0.44 sec
B. 0.49 sec
C. 0.38 sec
D. 0.52 sec
Answer: B. 0.49 sec
RATIONALE: Bazett's formula: QTc = QT / √(RR). RR 0.80 → √0.80 = 0.894; 0..894
= 0.492 sec. Normal QTc ≤0.44 sec in males, ≤0.46 in females.
Q5. A patient with a wide QRS (0.14 sec), monomorphic appearance, rate 160 bpm,
and no visible P waves. What is the rhythm?
A. Atrial flutter
B. Ventricular tachycardia
C. SVT with aberrancy
D. Wolff-Parkinson-White
Answer: B. Ventricular tachycardia
RATIONALE: A wide QRS tachycardia (>0.12 sec) at a rate >100 bpm with no visible P
waves is ventricular tachycardia (VT) until proven otherwise. Monomorphic VT suggests
a single irritable focus in the ventricle.
, Q6. A 6-second strip shows 8 QRS complexes. What is the heart rate?
A. 60 bpm
B. 70 bpm
C. 80 bpm
D. 90 bpm
Answer: C. 80 bpm
RATIONALE: For irregular rhythms: Count the QRS complexes in a 6-second strip (30
large boxes) and multiply by 10. 8 × 10 = 80 bpm.
Q7. Identify the rhythm: Regular R-R intervals, sawtooth flutter waves at 300 bpm,
and 2:1 conduction. Ventricular rate is 150 bpm.
A. Atrial fibrillation
B. Atrial flutter
C. Sinus tachycardia
D. MAT
Answer: B. Atrial flutter
RATIONALE: Sawtooth flutter waves (F waves) at ~250-350 bpm with variable AV
conduction. 2:1 block gives a ventricular rate ~150. It is often regular.
Q8. A patient has a regular wide complex tachycardia at 210 bpm. They are
hypotensive and confused. Next step?
A. Adenosine 6 mg IV
B. Synchronized cardioversion
C. Amiodarone 300 mg IV
D. Lidocaine 100 mg IV
Answer: B. Synchronized cardioversion
RATIONALE: Unstable tachyarrhythmia with altered mental status → immediate
synchronized cardioversion (start 100-200J biphasic). Do not delay for medication.
