Relias Dysrhythmia Basic Test A Exam Prep: 35 Questions & Verified Answers (2026/2027)

Relias Dysrhythmia Basic Test A Exam
Prep: 107 Questions & Verified Answers
(2026/2027)




Question 1

A patient's telemetry strip shows a regular rhythm, upright P waves preceding
every QRS complex, a PR interval of 0.16 seconds, a QRS duration of 0.08

, seconds, and a heart rate of 72 bpm. How should this rhythm be classified?
A) Sinus Bradycardia
B) Normal Sinus Rhythm
C) First-Degree AV Block
D) Atrial Flutter

 Verified Answer: B) Normal Sinus Rhythm
 Rationale: All parameters fall within normal physiological limits for an adult:
regular rhythm, heart rate between 60–100 bpm, a normal PR interval (0.12–
0.20 seconds), and a narrow QRS complex (<0.12 seconds).
Question 2

While evaluating an EKG strip for an adult patient, you count 4 large boxes
between two consecutive R waves. Using the standard box method, what is the
patient's exact heart rate?
A) 60 bpm
B) 75 bpm
C) 100 bpm
D) 150 bpm

 Verified Answer: B) 75 bpm
 Rationale: The large box method dictates dividing 300 by the number of large
boxes between R waves. Therefore, 300 divided by 4 equals 75 bpm.
Question 3

A telemetry technician notes a rhythm that is irregularly irregular with no
discernible, organized P waves. The baseline instead exhibits chaotic,
undulating waves. What is the primary diagnosis?
A) Atrial Flutter
B) Ventricular Fibrillation

, C) Atrial Fibrillation
D) Junctional Rhythm

 Verified Answer: C) Atrial Fibrillation
 Rationale: Atrial fibrillation is characterized by an irregularly irregular
ventricular response and an absolute absence of true P waves, which are
replaced by rapid, disorganized fibrillatory (f) waves.
Question 4

An EKG strip shows a constant, prolonged PR interval of 0.26 seconds. Every P
wave is successfully conducted, leading to a narrow QRS complex. Which
conduction delay is present?
A) First-Degree AV Block
B) Second-Degree AV Block Type I
C) Second-Degree AV Block Type II
D) Third-Degree AV Block

 Verified Answer: A) First-Degree AV Block
 Rationale: A First-Degree AV Block is defined by a prolonged PR interval
greater than 0.20 seconds that remains completely constant across all beats,
with no dropped QRS complexes.
Question 5

A patient's monitor displays a heart rate of 118 bpm. The rhythm is regular, P
waves are upright and uniform, and each is followed by a normal QRS complex.
This rhythm is:
A) Supraventricular Tachycardia
B) Ventricular Tachycardia
C) Sinus Tachycardia
D) Atrial Flutter

 Verified Answer: C) Sinus Tachycardia

,  Rationale: Sinus tachycardia matches all normal sinus rhythm criteria but
features a elevated heart rate originating from the SA node between 101 and
150 bpm.
Question 6

You observe an early, abnormal-looking P wave on an EKG strip that breaks the
regular cycle of the underlying sinus rhythm. The QRS complex that follows it
looks narrow and identical to the other sinus QRS complexes. What is this beat?
A) Premature Ventricular Contraction
B) Premature Atrial Contraction
C) Junctional Escape Beat
D) Ventricular Escape Beat

 Verified Answer: B) Premature Atrial Contraction
 Rationale: A Premature Atrial Contraction (PAC) originates from an ectopic
focus in the atria outside the SA node, causing an early, abnormally shaped P
wave. Because it travels normally through the AV node, the QRS complex
remains narrow.
Question 7

An EKG strip displays a rhythm where the PR intervals grow progressively
longer with each successive beat until a P wave occurs that is completely
blocked, failing to produce a QRS complex. Following the dropped beat, the
cycle repeats. What is this rhythm?
A) Second-Degree AV Block Type I (Wenckebach)
B) Second-Degree AV Block Type II (Mobitz II)
C) Third-Degree AV Block
D) Sinus Arrest

 Verified Answer: A) Second-Degree AV Block Type I (Wenckebach)