Relias Advanced Dysrhythmia Exam A | 2025–2026 Edition Exam Test
Questions And Correct Answers (Verified Answers) Plus Rationales
2025/2026 Q&A
Junctional Rhythms - CORRECT ANSWERS-SA Node DID NOT FIRE
AV Node fired
NO P WAVE bc SA node didn't fire
Narrow QRS
P Wave - CORRECT ANSWERS-Amplitude 0.5-2.5 mm
Will be shorter than T wave
Shows firing of SA node
QRS - CORRECT ANSWERS-0.06-0.10 sec SHOULD BE <0.12 sec
Wide QRS: delay in ventricular contraction, delay of conduction through bundle branches or purkinje
fibers
BUNDLE BRANCH BLOCK or BLOCK IN PURKINJE FIBERS (idioventricular)
Calculate Regular Rate - CORRECT ANSWERS-1500/ # boxes R-R
Calculate Irregular Rate - CORRECT ANSWERS-# of Rs in 6 sec strip X 10
AV Node - CORRECT ANSWERS-2nd
40-60
Bundle of His - CORRECT ANSWERS-3rd
40-45
, Right and Left Bundle Branches - CORRECT ANSWERS-4th
40-45
Purkinje Fibers - CORRECT ANSWERS-5th
20-50
1 Small Box - CORRECT ANSWERS-0.04 sec
1 Big Box - CORRECT ANSWERS-0.20 sec
Premature Atrial Contraction - CORRECT ANSWERS-IRREGULAR
Rate: depends on underlying rhythm
P wave: Present or hidden in T wave
PR Interval: 0.12-0.20 sec
QRS: <0.12 sec
Atrial Fibrillation - CORRECT ANSWERS-IRREGULAR
Atrial rate: UNMEASURABLE
Ventricular rate: variable
P wave: unable to see
PR Interval: N/A
QRS: <0.12 sec
A fib RVR - CORRECT ANSWERS-IRREGULAR
Ventricular rate: 100-175
P wave: unable to see
Questions And Correct Answers (Verified Answers) Plus Rationales
2025/2026 Q&A
Junctional Rhythms - CORRECT ANSWERS-SA Node DID NOT FIRE
AV Node fired
NO P WAVE bc SA node didn't fire
Narrow QRS
P Wave - CORRECT ANSWERS-Amplitude 0.5-2.5 mm
Will be shorter than T wave
Shows firing of SA node
QRS - CORRECT ANSWERS-0.06-0.10 sec SHOULD BE <0.12 sec
Wide QRS: delay in ventricular contraction, delay of conduction through bundle branches or purkinje
fibers
BUNDLE BRANCH BLOCK or BLOCK IN PURKINJE FIBERS (idioventricular)
Calculate Regular Rate - CORRECT ANSWERS-1500/ # boxes R-R
Calculate Irregular Rate - CORRECT ANSWERS-# of Rs in 6 sec strip X 10
AV Node - CORRECT ANSWERS-2nd
40-60
Bundle of His - CORRECT ANSWERS-3rd
40-45
, Right and Left Bundle Branches - CORRECT ANSWERS-4th
40-45
Purkinje Fibers - CORRECT ANSWERS-5th
20-50
1 Small Box - CORRECT ANSWERS-0.04 sec
1 Big Box - CORRECT ANSWERS-0.20 sec
Premature Atrial Contraction - CORRECT ANSWERS-IRREGULAR
Rate: depends on underlying rhythm
P wave: Present or hidden in T wave
PR Interval: 0.12-0.20 sec
QRS: <0.12 sec
Atrial Fibrillation - CORRECT ANSWERS-IRREGULAR
Atrial rate: UNMEASURABLE
Ventricular rate: variable
P wave: unable to see
PR Interval: N/A
QRS: <0.12 sec
A fib RVR - CORRECT ANSWERS-IRREGULAR
Ventricular rate: 100-175
P wave: unable to see
