Basic Dysrhythmia – Relias Exam (Latest
2025) | 100% Correct Answers &
Rationales
normal sinus rhythm - ---✔✔✔ANSWER----heart rhythm originating in the
sinoatrial node with a rate in patients at rest of 60 to 100 beats per minute
Sinus Arrhythmia - ---✔✔✔ANSWER----Appearance is ALMOST
NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN)
Sinus Bradycardia - ---✔✔✔ANSWER----<60
normal sinus rhythm
Sinus Tachycardia - ---✔✔✔ANSWER---->100 (100-150)
normal sinus rhythm
, Premature Atrial Contraction (PAC) - ---✔✔✔ANSWER----Heart Rate:
Depends on underlying rhythm
Regularity: Interrupts the regularity of underlying rhythm
P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
PRI: measures between .12-.20 seconds and can be prolonged; can be different
from other complexes
QRS: <.12 seconds
Sinus Arrest/Pause - ---✔✔✔ANSWER----- SA node doesn't fire
- notice absence of P-wave for a complete cycle (a missed cycle)
length of pause ≠ multiple of normal rate (block)
Atrial Fibrillation (A-Fib) - ---✔✔✔ANSWER----an irregular and often
very fast heart rate originating from abnormal conduction in the atria
Atrial Flutter - ---✔✔✔ANSWER----irregular beating of the atria; often
described as "a-flutter with 2 to 1 block or 3 to 1 block"
Junctional Rhythm - ---✔✔✔ANSWER----40-60 Regular!
-impulse from AV node w/ retro/antegrade transmission
- P wave often inverted/buried/follow QRS
- slow rate
- narrow QRS (not wide like ventricular)
2025) | 100% Correct Answers &
Rationales
normal sinus rhythm - ---✔✔✔ANSWER----heart rhythm originating in the
sinoatrial node with a rate in patients at rest of 60 to 100 beats per minute
Sinus Arrhythmia - ---✔✔✔ANSWER----Appearance is ALMOST
NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN)
Sinus Bradycardia - ---✔✔✔ANSWER----<60
normal sinus rhythm
Sinus Tachycardia - ---✔✔✔ANSWER---->100 (100-150)
normal sinus rhythm
, Premature Atrial Contraction (PAC) - ---✔✔✔ANSWER----Heart Rate:
Depends on underlying rhythm
Regularity: Interrupts the regularity of underlying rhythm
P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
PRI: measures between .12-.20 seconds and can be prolonged; can be different
from other complexes
QRS: <.12 seconds
Sinus Arrest/Pause - ---✔✔✔ANSWER----- SA node doesn't fire
- notice absence of P-wave for a complete cycle (a missed cycle)
length of pause ≠ multiple of normal rate (block)
Atrial Fibrillation (A-Fib) - ---✔✔✔ANSWER----an irregular and often
very fast heart rate originating from abnormal conduction in the atria
Atrial Flutter - ---✔✔✔ANSWER----irregular beating of the atria; often
described as "a-flutter with 2 to 1 block or 3 to 1 block"
Junctional Rhythm - ---✔✔✔ANSWER----40-60 Regular!
-impulse from AV node w/ retro/antegrade transmission
- P wave often inverted/buried/follow QRS
- slow rate
- narrow QRS (not wide like ventricular)
