Relias Dysrhythmia Basic
Test Questions and Answers
(Basic A Dysrhythmia)
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,What is the normal duration of a PR interval on a resting ECG?
A) 0.04 - 0.10 seconds
B) 0.12 - 0.20 seconds
C) 0.20 - 0.32 seconds
D) 0.36 - 0.44 seconds
On a standard ECG strip, one small box represents how many
seconds?
A) 0.04 seconds
B) 0.10 seconds
C) 0.20 seconds
D) 1.0 second
What does the P wave represent on an ECG?
A) Atrial depolarization
B) Atrial repolarization
C) Ventricular depolarization
D) Ventricular repolarization
The normal intrinsic rate of the Sinoatrial (SA) node is:
A) 20 - 40 beats per minute
B) 40 - 60 beats per minute
C) 60 - 100 beats per minute
D) 100 - 150 beats per minute
Which of the following is characteristic of Normal Sinus Rhythm?
A) PR interval of 0.24 seconds
B) QRS duration of 0.14 seconds
C) Rate between 60 and 100 beats per minute
D) Irregular R-R intervals
What is the primary characteristic of sinus bradycardia?
A) Rate less than 60 bpm with a normal P wave and QRS
B) Rate greater than 100 bpm with a normal P wave and QRS
C) Absent P waves with a rate of 40 bpm
D) Irregular R-R intervals with a rate of 80 bpm
Which of the following is a common cause of sinus tachycardia?
A) Increased intracranial pressure
B) Sleep
C) Fever, pain, or anxiety
D) Vagal stimulation
A patient has a heart rate of 45 bpm, normal P waves, normal
, PR intervals, and normal QRS complexes. What is the most likely
rhythm?
A) Sinus arrest
B) Sinus bradycardia
C) Junctional escape rhythm
D) First-degree AV block
In sinus arrhythmia, the heart rate typically varies with:
A) Blood pressure changes
B) Respirations
C) Body temperature
D) Medication administration
What occurs during sinus arrest?
A) The SA node fires too slowly.
B) The SA node fires too quickly.
C) The SA node fails to fire, resulting in a dropped beat (no P,
QRS, or T wave).
D) The AV node takes over as the primary pacemaker
permanently.
The QRS complex on an ECG represents:
A) Ventricular depolarization
B) Ventricular repolarization
C) Atrial depolarization
D) AV node conduction delay
The T wave on an ECG represents:
A) Atrial repolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) SA node firing
The intrinsic rate of the Atrioventricular (AV) junction is:
A) 20 - 40 bpm
B) 40 - 60 bpm
C) 60 - 100 bpm
D) 100 - 150 bpm
How many large boxes are in a 6-second ECG strip?
A) 10
B) 15
C) 20
Test Questions and Answers
(Basic A Dysrhythmia)
(Latest ):
Answer key in the end of questions
THIS EXAM CONSISTS OF
Questions and Answers key
Multiple-choice Style
100% Guarantee Pass.
Each Question Includes The Correct Answer
Expert-Verified rationales
,What is the normal duration of a PR interval on a resting ECG?
A) 0.04 - 0.10 seconds
B) 0.12 - 0.20 seconds
C) 0.20 - 0.32 seconds
D) 0.36 - 0.44 seconds
On a standard ECG strip, one small box represents how many
seconds?
A) 0.04 seconds
B) 0.10 seconds
C) 0.20 seconds
D) 1.0 second
What does the P wave represent on an ECG?
A) Atrial depolarization
B) Atrial repolarization
C) Ventricular depolarization
D) Ventricular repolarization
The normal intrinsic rate of the Sinoatrial (SA) node is:
A) 20 - 40 beats per minute
B) 40 - 60 beats per minute
C) 60 - 100 beats per minute
D) 100 - 150 beats per minute
Which of the following is characteristic of Normal Sinus Rhythm?
A) PR interval of 0.24 seconds
B) QRS duration of 0.14 seconds
C) Rate between 60 and 100 beats per minute
D) Irregular R-R intervals
What is the primary characteristic of sinus bradycardia?
A) Rate less than 60 bpm with a normal P wave and QRS
B) Rate greater than 100 bpm with a normal P wave and QRS
C) Absent P waves with a rate of 40 bpm
D) Irregular R-R intervals with a rate of 80 bpm
Which of the following is a common cause of sinus tachycardia?
A) Increased intracranial pressure
B) Sleep
C) Fever, pain, or anxiety
D) Vagal stimulation
A patient has a heart rate of 45 bpm, normal P waves, normal
, PR intervals, and normal QRS complexes. What is the most likely
rhythm?
A) Sinus arrest
B) Sinus bradycardia
C) Junctional escape rhythm
D) First-degree AV block
In sinus arrhythmia, the heart rate typically varies with:
A) Blood pressure changes
B) Respirations
C) Body temperature
D) Medication administration
What occurs during sinus arrest?
A) The SA node fires too slowly.
B) The SA node fires too quickly.
C) The SA node fails to fire, resulting in a dropped beat (no P,
QRS, or T wave).
D) The AV node takes over as the primary pacemaker
permanently.
The QRS complex on an ECG represents:
A) Ventricular depolarization
B) Ventricular repolarization
C) Atrial depolarization
D) AV node conduction delay
The T wave on an ECG represents:
A) Atrial repolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) SA node firing
The intrinsic rate of the Atrioventricular (AV) junction is:
A) 20 - 40 bpm
B) 40 - 60 bpm
C) 60 - 100 bpm
D) 100 - 150 bpm
How many large boxes are in a 6-second ECG strip?
A) 10
B) 15
C) 20
