RELIAS DYSRHYTHMIA BASIC A FINAL REVIEW
2026 COMPLETE ANSWERS AND STUDY
SHEET
◉ 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)
◉ Junctional Tachycardia. Answer: >60 bpm (ms. K; 150-250)
- KEY: will be regular (consistent)
, - AV junction produces a rapid sequence of QRS-T cycles
- p-wave often inverted/buried/follow QRS
◉ Premature Junctional Contraction. Answer: Inverted p wave or
hidden p wave
PRI<0.12 or none
Normal QRS
◉ Supraventricular Tachycardia (SVT). Answer: an abnormal heart
rhythm arising from aberrant electrical activity in the heart;
originates at or above the AV node
◉ First degree heart block. Answer: atrioventricular (AV) block in
which the atrial electrical impulses are delayed by a fraction of a
second before being conducted to the ventricles
◉ 2nd degree heart block type 1 (Wenkebach). Answer:
Progressively longer PR interval until the P wave is not followed by a
QPR
◉ 2nd Degree Heart Block (Mobitz II). Answer: Rare, but more
serious
Sudden appearance of a nonconducted P-wave
P-waves are nl, but some aren't followed by a QRS complex
2026 COMPLETE ANSWERS AND STUDY
SHEET
◉ 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)
◉ Junctional Tachycardia. Answer: >60 bpm (ms. K; 150-250)
- KEY: will be regular (consistent)
, - AV junction produces a rapid sequence of QRS-T cycles
- p-wave often inverted/buried/follow QRS
◉ Premature Junctional Contraction. Answer: Inverted p wave or
hidden p wave
PRI<0.12 or none
Normal QRS
◉ Supraventricular Tachycardia (SVT). Answer: an abnormal heart
rhythm arising from aberrant electrical activity in the heart;
originates at or above the AV node
◉ First degree heart block. Answer: atrioventricular (AV) block in
which the atrial electrical impulses are delayed by a fraction of a
second before being conducted to the ventricles
◉ 2nd degree heart block type 1 (Wenkebach). Answer:
Progressively longer PR interval until the P wave is not followed by a
QPR
◉ 2nd Degree Heart Block (Mobitz II). Answer: Rare, but more
serious
Sudden appearance of a nonconducted P-wave
P-waves are nl, but some aren't followed by a QRS complex
