Relias DYSRHYTHMIA BASIC A Exam (2026)
Actual Exam 2026/2027 – Complete Exam-Style
Questions with Detailed Rationales | 100% Verified –
Pass Guaranteed – A+ Graded
Subject: Basic Dysrhythmia Recognition and Interpretation
Duration: 60 minutes
Total Marks: 50
Total Number of Questions: 20
Instructions:
1. Answer all questions in all sections.
2. For Multiple Choice Questions (Section A), select the single best answer.
3. For Short Answer and Clinical Scenario questions (Sections B and C), provide concise,
clinically accurate responses.
4. Total time allowed is 60 minutes. Manage your time accordingly.
SECTION A: MULTIPLE CHOICE QUESTIONS (20 Marks)
(Each question carries 2 marks)
Question 1:
What is the normal heart rate range for an adult in normal sinus rhythm?
Options:
A) 40–60 beats per minute
B) 60–100 beats per minute
C) 100–120 beats per minute
D) 80–120 beats per minute
Correct Answer: B) 60–100 beats per minute
Marks: 2
Rationale: Normal sinus rhythm is characterized by a heart rate between 60 and 100 beats
per minute. Rates below 60 indicate sinus bradycardia, while rates above 100 indicate sinus
tachycardia. This is a fundamental baseline for all dysrhythmia interpretation.
Question 2:
What is the normal duration of the PR interval on a standard ECG?
Options:
A) 0.04–0.10 seconds
B) 0.12–0.20 seconds
C) 0.20–0.24 seconds
D) 0.06–0.12 seconds
Correct Answer: B) 0.12–0.20 seconds
, Marks: 2
Rationale: The PR interval represents the time it takes for the electrical impulse to travel
from the SA node through the AV node. A normal duration is 3 to 5 small boxes, which
equals 0.12 to 0.20 seconds. Prolongation indicates an AV block.
Question 3:
Which of the following best describes the ECG hallmark of atrial fibrillation?
Options:
A) Regular rhythm with sawtooth P waves
B) Irregularly irregular rhythm with absent P waves and fibrillatory waves
C) Regular rhythm with inverted P waves
D) Irregular rhythm with progressively lengthening PR intervals
Correct Answer: B) Irregularly irregular rhythm with absent P waves and fibrillatory waves
Marks: 2
Rationale: Atrial fibrillation is characterized by chaotic atrial activity, resulting in an
irregularly irregular ventricular response. Distinct P waves are absent, replaced by fine or
coarse fibrillatory waves, indicating disorganized atrial depolarization.
Question 4:
A QRS complex duration greater than 0.12 seconds indicates:
Options:
A) Normal ventricular depolarization
B) Delayed conduction through the atria
C) Abnormal or delayed ventricular depolarization
D) First-degree AV block
Correct Answer: C) Abnormal or delayed ventricular depolarization
Marks: 2
Rationale: A normal QRS complex is less than 0.12 seconds (3 small boxes). A duration
greater than 0.12 seconds indicates that the impulse is originating in the ventricles or there
is a bundle branch block, causing delayed ventricular depolarization.
Question 5:
What is the primary initial pharmacological treatment for symptomatic sinus bradycardia?
Options:
A) Amiodarone
B) Epinephrine
C) Atropine
D) Adenosine
Correct Answer: C) Atropine
Marks: 2
Rationale: Atropine is the first-line medication for symptomatic sinus bradycardia. It works
by blocking vagal (parasympathetic) tone on the SA node, thereby increasing the heart rate
and improving cardiac output.
Question 6:
Which rhythm is characterized by a regular rhythm, heart rate of 150 bpm, absent P waves,
and a narrow QRS complex?
Actual Exam 2026/2027 – Complete Exam-Style
Questions with Detailed Rationales | 100% Verified –
Pass Guaranteed – A+ Graded
Subject: Basic Dysrhythmia Recognition and Interpretation
Duration: 60 minutes
Total Marks: 50
Total Number of Questions: 20
Instructions:
1. Answer all questions in all sections.
2. For Multiple Choice Questions (Section A), select the single best answer.
3. For Short Answer and Clinical Scenario questions (Sections B and C), provide concise,
clinically accurate responses.
4. Total time allowed is 60 minutes. Manage your time accordingly.
SECTION A: MULTIPLE CHOICE QUESTIONS (20 Marks)
(Each question carries 2 marks)
Question 1:
What is the normal heart rate range for an adult in normal sinus rhythm?
Options:
A) 40–60 beats per minute
B) 60–100 beats per minute
C) 100–120 beats per minute
D) 80–120 beats per minute
Correct Answer: B) 60–100 beats per minute
Marks: 2
Rationale: Normal sinus rhythm is characterized by a heart rate between 60 and 100 beats
per minute. Rates below 60 indicate sinus bradycardia, while rates above 100 indicate sinus
tachycardia. This is a fundamental baseline for all dysrhythmia interpretation.
Question 2:
What is the normal duration of the PR interval on a standard ECG?
Options:
A) 0.04–0.10 seconds
B) 0.12–0.20 seconds
C) 0.20–0.24 seconds
D) 0.06–0.12 seconds
Correct Answer: B) 0.12–0.20 seconds
, Marks: 2
Rationale: The PR interval represents the time it takes for the electrical impulse to travel
from the SA node through the AV node. A normal duration is 3 to 5 small boxes, which
equals 0.12 to 0.20 seconds. Prolongation indicates an AV block.
Question 3:
Which of the following best describes the ECG hallmark of atrial fibrillation?
Options:
A) Regular rhythm with sawtooth P waves
B) Irregularly irregular rhythm with absent P waves and fibrillatory waves
C) Regular rhythm with inverted P waves
D) Irregular rhythm with progressively lengthening PR intervals
Correct Answer: B) Irregularly irregular rhythm with absent P waves and fibrillatory waves
Marks: 2
Rationale: Atrial fibrillation is characterized by chaotic atrial activity, resulting in an
irregularly irregular ventricular response. Distinct P waves are absent, replaced by fine or
coarse fibrillatory waves, indicating disorganized atrial depolarization.
Question 4:
A QRS complex duration greater than 0.12 seconds indicates:
Options:
A) Normal ventricular depolarization
B) Delayed conduction through the atria
C) Abnormal or delayed ventricular depolarization
D) First-degree AV block
Correct Answer: C) Abnormal or delayed ventricular depolarization
Marks: 2
Rationale: A normal QRS complex is less than 0.12 seconds (3 small boxes). A duration
greater than 0.12 seconds indicates that the impulse is originating in the ventricles or there
is a bundle branch block, causing delayed ventricular depolarization.
Question 5:
What is the primary initial pharmacological treatment for symptomatic sinus bradycardia?
Options:
A) Amiodarone
B) Epinephrine
C) Atropine
D) Adenosine
Correct Answer: C) Atropine
Marks: 2
Rationale: Atropine is the first-line medication for symptomatic sinus bradycardia. It works
by blocking vagal (parasympathetic) tone on the SA node, thereby increasing the heart rate
and improving cardiac output.
Question 6:
Which rhythm is characterized by a regular rhythm, heart rate of 150 bpm, absent P waves,
and a narrow QRS complex?
