Basic Dysrhythmia-Relias
Study online at
1. heart rhythm originating in the sinoatrial node with a rate in patients at
rest of 60 to 100 beats per minute: normal sinus rhythm
2. Appearance is ALMOST NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN): Sinus
Arrhythmia 3. <60
normal sinus rhythm: Sinus Bradycardia
4. >100 (100-150)
normal sinus rhythm: Sinus Tachycardia
5. 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
differ- ent from other complexes
QRS: <.12 seconds: Premature Atrial Contraction (PAC)
6. - 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): Sinus
Arrest/Pause normal con-
7. an irregular and often very fast heart rate originating from ab
duction in the atria: Atrial Fibrillation (A-Fib)
8. irregular beating of the atria; often described as "a-flutter 2 to 1
with or 3 to 1 block": Atrial Flutter block
9. 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
Rhythm 10. >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: Junctional Tachycardia
11. Inverted p wave or hidden p
wave PRI<0.12 or none
Normal QRS: Premature Junctional Contraction
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Study online at
1. heart rhythm originating in the sinoatrial node with a rate in patients at
rest of 60 to 100 beats per minute: normal sinus rhythm
2. Appearance is ALMOST NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN): Sinus
Arrhythmia 3. <60
normal sinus rhythm: Sinus Bradycardia
4. >100 (100-150)
normal sinus rhythm: Sinus Tachycardia
5. 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
differ- ent from other complexes
QRS: <.12 seconds: Premature Atrial Contraction (PAC)
6. - 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): Sinus
Arrest/Pause normal con-
7. an irregular and often very fast heart rate originating from ab
duction in the atria: Atrial Fibrillation (A-Fib)
8. irregular beating of the atria; often described as "a-flutter 2 to 1
with or 3 to 1 block": Atrial Flutter block
9. 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
Rhythm 10. >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: Junctional Tachycardia
11. Inverted p wave or hidden p
wave PRI<0.12 or none
Normal QRS: Premature Junctional Contraction
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