Relias Dysrhythmia Basic Test 300 Questions and
Answers 2026/2027 (Basic A Dysrhythmia)
300 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Relias Dysrhythmia Basic Test 300 Questions and Answers 2026/2027 (Basic A Dysrhythmia)
,Q1
On standard EKG paper running at 25 mm/sec, one small box represents how many seconds?
A) 0.04 second CORRECT
B) 0.10 second
C) 0.20 second
D) 0.02 second
Rationale
At 25 mm/sec, each small box (1 mm) equals 0.04 second. Five small boxes make one large box (0.20
second).
Q2
On standard EKG paper, one large box represents how many seconds?
A) 0.04 second
B) 0.12 second
C) 0.20 second CORRECT
D) 0.40 second
Rationale
One large box contains five small boxes. Since each small box is 0.04 second, one large box equals 0.20
second.
Q3
Using the 300 method, if there are 3 large boxes between R waves, the heart rate is:
A) 60 bpm
B) 75 bpm
C) 100 bpm CORRECT
D) 150 bpm
2
,Rationale
The 300 method divides 300 by the number of large boxes. = 100 bpm.
Q4
Using the 300 method, if there are 5 large boxes between R waves, the heart rate is:
A) 50 bpm
B) 60 bpm CORRECT
C) 75 bpm
D) 100 bpm
Rationale
= 60 bpm.
Q5
Using the 1500 method, if there are 15 small boxes between R waves, the heart rate is:
A) 60 bpm
B) 75 bpm
C) 100 bpm CORRECT
D) 150 bpm
Rationale
The 1500 method divides 1500 by the number of small boxes. = 100 bpm.
Q6
Using the 1500 method, if there are 25 small boxes between R waves, the heart rate is:
A) 50 bpm
B) 60 bpm CORRECT
C) 75 bpm
D) 100 bpm
3
, Rationale
= 60 bpm.
Q7
The normal duration of a PR interval is:
A) 0.04 to 0.10 seconds
B) 0.12 to 0.20 seconds CORRECT
C) 0.20 to 0.24 seconds
D) 0.06 to 0.12 seconds
Rationale
A normal PR interval is 0.12 to 0.20 seconds, representing the time from atrial depolarization to
ventricular depolarization.
Q8
A PR interval of 0.24 seconds is considered:
A) Normal
B) Shortened
C) Prolonged CORRECT
D) Indeterminate
Rationale
A PR interval greater than 0.20 seconds is prolonged and indicates a first-degree AV block.
Q9
The normal duration of a QRS complex is:
A) Less than 0.12 seconds CORRECT
B) 0.12 to 0.20 seconds
4
Answers 2026/2027 (Basic A Dysrhythmia)
300 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Relias Dysrhythmia Basic Test 300 Questions and Answers 2026/2027 (Basic A Dysrhythmia)
,Q1
On standard EKG paper running at 25 mm/sec, one small box represents how many seconds?
A) 0.04 second CORRECT
B) 0.10 second
C) 0.20 second
D) 0.02 second
Rationale
At 25 mm/sec, each small box (1 mm) equals 0.04 second. Five small boxes make one large box (0.20
second).
Q2
On standard EKG paper, one large box represents how many seconds?
A) 0.04 second
B) 0.12 second
C) 0.20 second CORRECT
D) 0.40 second
Rationale
One large box contains five small boxes. Since each small box is 0.04 second, one large box equals 0.20
second.
Q3
Using the 300 method, if there are 3 large boxes between R waves, the heart rate is:
A) 60 bpm
B) 75 bpm
C) 100 bpm CORRECT
D) 150 bpm
2
,Rationale
The 300 method divides 300 by the number of large boxes. = 100 bpm.
Q4
Using the 300 method, if there are 5 large boxes between R waves, the heart rate is:
A) 50 bpm
B) 60 bpm CORRECT
C) 75 bpm
D) 100 bpm
Rationale
= 60 bpm.
Q5
Using the 1500 method, if there are 15 small boxes between R waves, the heart rate is:
A) 60 bpm
B) 75 bpm
C) 100 bpm CORRECT
D) 150 bpm
Rationale
The 1500 method divides 1500 by the number of small boxes. = 100 bpm.
Q6
Using the 1500 method, if there are 25 small boxes between R waves, the heart rate is:
A) 50 bpm
B) 60 bpm CORRECT
C) 75 bpm
D) 100 bpm
3
, Rationale
= 60 bpm.
Q7
The normal duration of a PR interval is:
A) 0.04 to 0.10 seconds
B) 0.12 to 0.20 seconds CORRECT
C) 0.20 to 0.24 seconds
D) 0.06 to 0.12 seconds
Rationale
A normal PR interval is 0.12 to 0.20 seconds, representing the time from atrial depolarization to
ventricular depolarization.
Q8
A PR interval of 0.24 seconds is considered:
A) Normal
B) Shortened
C) Prolonged CORRECT
D) Indeterminate
Rationale
A PR interval greater than 0.20 seconds is prolonged and indicates a first-degree AV block.
Q9
The normal duration of a QRS complex is:
A) Less than 0.12 seconds CORRECT
B) 0.12 to 0.20 seconds
4
