RELIAS DYSRHYTHMIA BASIC A (2026 EDITION) COMPLETE PRACTICE TEST WITH VERIFIED ANSWERS & DETAILED RATIONALES

RELIAS DYSRHYTHMIA BASIC A (2026 EDITION)
COMPLETE PRACTICE TEST WITH VERIFIED
ANSWERS & DETAILED RATIONALES


Cardiac Rhythm Interpretation • ECG Fundamentals • Arrhythmia Recognition
• Exam Preparation Guide

Updated 2026 Study Resource | Comprehensive Review | Practice Questions & Answer Key




Relias Dysrhythmia Basic A (2026) Complete
Practice Test
Instructions

• Read each question carefully.
• Select the best answer.
• Answers and rationales are provided at the end for self-assessment.
• Designed to reinforce ECG interpretation and dysrhythmia recognition skills.




Question 1 de




Which cardiac structure normally initiates the electrical impulse that causes the heart to beat?
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A. AV Node
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B. Bundle of His
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C. SA Node
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D. Purkinje Fibers
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Answer: C. SA Node de de de




Rationale: The sinoatrial (SA) node is the heart's natural pacemaker and normally initiates impulses
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at 60–100 beats per minute.
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, Question 2 de




A normal adult sinus rhythm typically has a heart rate of:
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A. 20–40 bpm
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B. 40–60 bpm
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C. 60–100 bpm
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D. 100–150 bpm
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Answer: C. 60–100 bpm de de de




Rationale: Normal sinus rhythm originates from the SA node and maintains a rate between 60 and 1
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00 beats per minute.
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Question 3 de




The PR interval represents:
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A. Ventricular depolarization
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B. Atrial depolarization and AV conduction
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C. Ventricular repolarization
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D. Atrial repolarization only
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Answer: B. Atrial depolarization and AV conduction
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Rationale: The PR interval reflects the time required for electrical impulses to travel from the atria t
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hrough the AV node to the ventricles.
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Question 4 de




Which ECG wave represents ventricular depolarization?
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A. P Wave
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B. T Wave
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C. U Wave
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D. QRS Complex
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Answer: D. QRS Complex de de de




Rationale: The QRS complex reflects ventricular depolarization and is normally narrow.
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