Basic Dysrhythmia-Relias Questions And
Answers
Sinus Arrest/Pause - 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) an irregular and often very fast heart rate originating fro...
- notice absence of P-wave for a complete cycle (a missed cycle)
length of pause ≠ multiple of normal rate (block)
Atrial Fibrillation (A-Fib) an irregular and often very fast heart rate originating from
abnormal conduction in the atria
Atrial Flutter irregular beating of the atria; often described as "a-flutter with 2 to 1 block
or 3 to 1 block"
Junctional Rhythm 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 >60 bpm (ms. K; 150-250)
, Basic Dysrhythmia-Relias Questions And
Answers
- 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 Inverted p wave or hidden p wave
PRI<0.12 or none
Normal QRS
Supraventricular Tachycardia (SVT) an abnormal heart rhythm arising from aberrant
electrical activity in the heart; originates at or above the AV node
First degree heart block 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) Progressively longer PR interval until the P
wave is not followed by a QPR
2nd Degree Heart Block (Mobitz II) Rare, but more serious
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