Relias Dysrhythmia Basic B Actual Exam
2026/2027 | Verified Questions
Relias Learning Systems | Verified Q&A | Healthcare
Professionals and Nursing Staff
Comprehensive 35-Question Original Actual Exam Set | 2026/2027
Introduction
This 2026/2027 comprehensive 35-question actual exam set provides original questions covering Basic ECG
Interpretation and Waveform Analysis, Identification of Common Dysrhythmias including sinus, atrial,
junctional, and ventricular rhythms, Clinical Interventions and Patient Assessment, and Pharmacological
Management and Emergency Protocols. The content is designed to reinforce official Relias competency course
objectives for actual exam readiness and clinical proficiency by strengthening rhythm strip measurement,
waveform recognition, patient-centered assessment, escalation priorities, medication awareness, and evidence-
based cardiac care decisions. Each item includes Verified Questions with concise rationales grounded in Relias
dysrhythmia training concepts, current American Heart Association guidance, and foundational cardiac nursing
standards.
Domain: Basic ECG Interpretation and Waveform Analysis
1. When measuring a PR interval on a rhythm strip, which points should be used?
A. From the beginning of the P wave to the beginning of the QRS complex
B. From the peak of the P wave to the end of the T wave
C. From the beginning of the QRS complex to the end of the T wave
D. From one R wave to the next R wave
Correct Answer: A
Rationale: The PR interval represents atrial depolarization through atrioventricular conduction and is
measured from the start of the P wave to the start of the QRS complex.
2. Which ECG measurement is most directly used to determine ventricular rate on a regular
rhythm strip?
A. The P wave height
B. The R-R interval
C. The ST segment slope
D. The T wave polarity
Correct Answer: B
Rationale: Ventricular rate is determined from spacing between ventricular depolarizations, commonly
measured from one R wave to the next in a regular rhythm.
3. What does the QRS complex represent electrically?
A. Atrial repolarization only
B. Ventricular repolarization
C. Ventricular depolarization
D. Sinoatrial node recovery
Correct Answer: C
Rationale: The QRS complex reflects depolarization spreading through the ventricles and normally is
narrow when conduction follows the normal His-Purkinje pathway.
4. Which finding describes a normal QRS duration in many adult ECG interpretations?
Relias Dysrhythmia Basic B Actual Exam 2026/2027 | Verified Questions
, A. Greater than 0.20 second
B. Exactly 1 full second
C. Longer than the QT interval
D. Less than 0.12 second
Correct Answer: D
Rationale: A normal QRS is typically less than 0.12 second; widening suggests delayed ventricular
conduction or ventricular origin.
5. Which waveform represents atrial depolarization?
A. P wave
B. T wave
C. U wave
D. ST segment
Correct Answer: A
Rationale: The P wave represents electrical activation of the atria before atrial contraction.
6. Which ECG component is evaluated for elevation or depression when assessing possible
myocardial ischemia or injury?
A. PR segment only
B. ST segment
C. R-R interval only
D. P wave axis only
Correct Answer: B
Rationale: ST-segment displacement can indicate myocardial ischemia, injury, or other acute cardiac
conditions requiring clinical correlation.
7. Which method can estimate heart rate on a regular rhythm when using standard ECG paper at
25 mm/sec?
A. Divide 10 by the number of P waves
B. Count T waves in one small box
C. Divide 300 by the number of large boxes between R waves
D. Multiply PR interval by QRS duration
Correct Answer: C
Rationale: At standard speed, each large box is 0.20 second, so 300 divided by large boxes between R waves
estimates beats per minute.
8. Which finding indicates an irregular rhythm during basic strip analysis?
A. Identical QRS complexes only
B. One P wave before each QRS
C. A flat isoelectric baseline between complexes
D. Unequal R-R intervals across the strip
Correct Answer: D
Rationale: Regularity is assessed by comparing R-R intervals; unequal spacing indicates irregular
ventricular rhythm.
9. Why is artifact important to recognize before interpreting a rhythm strip?
A. Artifact can mimic dysrhythmia and lead to inappropriate response
B. Artifact always confirms cardiac arrest
C. Artifact improves waveform accuracy
D. Artifact eliminates the need to assess the patient
Correct Answer: A
Rationale: Movement, loose electrodes, or interference can distort the tracing, so the patient and leads
should be assessed before acting on a suspicious strip.
Domain: Identification of Common Dysrhythmias
10. Which rhythm is characterized by a regular rate of 60 to 100 beats per minute, upright P
waves before every QRS, and a consistent PR interval?
Relias Dysrhythmia Basic B Actual Exam 2026/2027 | Verified Questions
2026/2027 | Verified Questions
Relias Learning Systems | Verified Q&A | Healthcare
Professionals and Nursing Staff
Comprehensive 35-Question Original Actual Exam Set | 2026/2027
Introduction
This 2026/2027 comprehensive 35-question actual exam set provides original questions covering Basic ECG
Interpretation and Waveform Analysis, Identification of Common Dysrhythmias including sinus, atrial,
junctional, and ventricular rhythms, Clinical Interventions and Patient Assessment, and Pharmacological
Management and Emergency Protocols. The content is designed to reinforce official Relias competency course
objectives for actual exam readiness and clinical proficiency by strengthening rhythm strip measurement,
waveform recognition, patient-centered assessment, escalation priorities, medication awareness, and evidence-
based cardiac care decisions. Each item includes Verified Questions with concise rationales grounded in Relias
dysrhythmia training concepts, current American Heart Association guidance, and foundational cardiac nursing
standards.
Domain: Basic ECG Interpretation and Waveform Analysis
1. When measuring a PR interval on a rhythm strip, which points should be used?
A. From the beginning of the P wave to the beginning of the QRS complex
B. From the peak of the P wave to the end of the T wave
C. From the beginning of the QRS complex to the end of the T wave
D. From one R wave to the next R wave
Correct Answer: A
Rationale: The PR interval represents atrial depolarization through atrioventricular conduction and is
measured from the start of the P wave to the start of the QRS complex.
2. Which ECG measurement is most directly used to determine ventricular rate on a regular
rhythm strip?
A. The P wave height
B. The R-R interval
C. The ST segment slope
D. The T wave polarity
Correct Answer: B
Rationale: Ventricular rate is determined from spacing between ventricular depolarizations, commonly
measured from one R wave to the next in a regular rhythm.
3. What does the QRS complex represent electrically?
A. Atrial repolarization only
B. Ventricular repolarization
C. Ventricular depolarization
D. Sinoatrial node recovery
Correct Answer: C
Rationale: The QRS complex reflects depolarization spreading through the ventricles and normally is
narrow when conduction follows the normal His-Purkinje pathway.
4. Which finding describes a normal QRS duration in many adult ECG interpretations?
Relias Dysrhythmia Basic B Actual Exam 2026/2027 | Verified Questions
, A. Greater than 0.20 second
B. Exactly 1 full second
C. Longer than the QT interval
D. Less than 0.12 second
Correct Answer: D
Rationale: A normal QRS is typically less than 0.12 second; widening suggests delayed ventricular
conduction or ventricular origin.
5. Which waveform represents atrial depolarization?
A. P wave
B. T wave
C. U wave
D. ST segment
Correct Answer: A
Rationale: The P wave represents electrical activation of the atria before atrial contraction.
6. Which ECG component is evaluated for elevation or depression when assessing possible
myocardial ischemia or injury?
A. PR segment only
B. ST segment
C. R-R interval only
D. P wave axis only
Correct Answer: B
Rationale: ST-segment displacement can indicate myocardial ischemia, injury, or other acute cardiac
conditions requiring clinical correlation.
7. Which method can estimate heart rate on a regular rhythm when using standard ECG paper at
25 mm/sec?
A. Divide 10 by the number of P waves
B. Count T waves in one small box
C. Divide 300 by the number of large boxes between R waves
D. Multiply PR interval by QRS duration
Correct Answer: C
Rationale: At standard speed, each large box is 0.20 second, so 300 divided by large boxes between R waves
estimates beats per minute.
8. Which finding indicates an irregular rhythm during basic strip analysis?
A. Identical QRS complexes only
B. One P wave before each QRS
C. A flat isoelectric baseline between complexes
D. Unequal R-R intervals across the strip
Correct Answer: D
Rationale: Regularity is assessed by comparing R-R intervals; unequal spacing indicates irregular
ventricular rhythm.
9. Why is artifact important to recognize before interpreting a rhythm strip?
A. Artifact can mimic dysrhythmia and lead to inappropriate response
B. Artifact always confirms cardiac arrest
C. Artifact improves waveform accuracy
D. Artifact eliminates the need to assess the patient
Correct Answer: A
Rationale: Movement, loose electrodes, or interference can distort the tracing, so the patient and leads
should be assessed before acting on a suspicious strip.
Domain: Identification of Common Dysrhythmias
10. Which rhythm is characterized by a regular rate of 60 to 100 beats per minute, upright P
waves before every QRS, and a consistent PR interval?
Relias Dysrhythmia Basic B Actual Exam 2026/2027 | Verified Questions
