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Normal Sinus Rhythm
- Rate-- 60-100 bpm
- Rhythm-- R-R intervals are constant; rhythm regular
- P Wave-- Uniform & 1 for each QRS
- PRI-- 0.12-0.20 sec & constant
- QRS-- < 0.12 sec
- Sinus Bradycardia
- Rate-- < 60 bpm
- Rhythm-- R-R intervals constant & rhythm reg
- P Wave-- Uniform & 1 for each QRS
- PRI-- 0.12-0.20 sec & constant
- QRS-- < 0.12 sec
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Sinus Tachycardia
- Rate-- 100-160 bpm
- Rhythm-- R-R intervals constant & rhythm reg
- P Wave-- Uniform & 1 for every QRS
- PRI-- 0.12-0.20 sec & constant
- QRS-- < 0.12
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Sinus Arrhythmia
- Rate-- 60-100 bpm but can be slower
- Rhythm-- R-R interval varies & rhythm is slightly irr
- P Wave-- Uniform & 1 for every QRS
- PRI-- 0.12-0.20 sec & constant
- QRS-- <0.12 sec
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Wandering Atrial Pacemaker
- Rate-- 60-100 bpm but can be slower
- Rhythm-- slightly irr
- P Wave-- 1 P for every QRS but may tough to see depending on pacemaker site
- PRI-- 0.12-0.20 sec. Some PRI may be < 0.12
- QRS-- < 0.12 sec
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Premature Atrial Contraction (PAC)
- Rate-- Depends on underlying rhythm
- Rhythm-- single ectopic beat will effect regularity of underlying rhythm
- P Wave-- P wave of premature beat differs fr morphology of P Waves of underlying rhythm. Ectopic beat will have a P wave but it can be unusual - Can be notched, flattened or buried in the preceding T wave
- PRI-- 0.12-0.20 but can be prolonged. PRI of ectopic beat probably different than that of underlying rhythm
- QRS-- < 0.12 sec
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Atrial Tachycardia (rapid A Fib)
- Rate-- 150-250 bpm
- Rhythm-- R-R interval constant & rhythm reg
- P Waves-- 1 for every QRS. P's may be hidden in T's.
- PRI- 0.12-0.20 sec & constant. P may be difficult to measure if hidden in T's.
- QRS-- < 0.12 sec
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Atrial Flutter
- Rate-- Atrial rate 250-350, Ventricular rate varies
- Rhythm-- Atrial is regular. Ventricular can be reg or IR
- P Wave-- P replaced by "f" waves in a saw tooth pattern
- PRI-- Not measurable
- QRS-- < 0.12 sec-
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Atrial Fibrillation (A Tach)
- Rate-- Atrial = 350-400 Ventricular = Variable
- Rhythm-- IR-IR
- P Waves-- Ps replaced by "f" waves
- PRI-- Not discernable
- QRS-- Usually < 0.12 sec
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PVC
- Rate-- Depends on underlying rhythm
- Rhythm-- Can be R or IR
- P Waves-- W/underlying rhythm only
- PRI-- None w/PVC. Underlying rhythm yes
- QRS-- PVC > or equal to 0.12; usually wide & bizarre
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SVT
- Rate--Atrial & vent = 150-250
- Rhythm-- R
- P Waves-- Usually not discernable
- PRI-- Usually not discernable
- QRS-- < 0.12
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V Tach
- Rate-- 150-250 bpm
- Rhythm-- Atrial not discernible, Ventricular is R
- P Waves-- May or may not be present & not associated w/QRS
- PRI-- None
- QRS-- Bizarre morphology > 0.12
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V-Fib
- Rate-- Not discernible
- Rhythm-- Not discernible
- P Waves-- None
- PRI-- None
- QRS-- None
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2nd Degree AV Block (Mobitz II)
- Rate-- Atrial R; Ventricular Brady
- Rhythm-- Atrial R; Ventricular IR
- P Waves-- More Ps than QRS's
- PRI-- Normal then QRS drops a beat
- QRS-- < 0.12
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3rd Degree AV Block (complete)
- Rate-- 60-100 bpm
- Rhythm-- R
- P Waves-- Present but no relation to QRS
- PRI-- Variable
- QRS-- Normal
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1st Degree Block
- Rate-- Based on underlying rhythm
- Rhythm-- R
- P Waves-- Normal
- PRI-- > 0.20
- QRS-- < 0.12
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Junctional
- Rate-- 40-60 bpm
- Rhythm-- R
- P Waves-- May be inverted, missing, b/f, aft or lost in QRS
- PRI-- None
- QRS-- Normal
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Accelerated Junctional
- Rate-- 60-100
- Rhythm-- R
- P Wave-- May be inverted, missing, b/f, aft or lost in QRS
- PRI-- None
- QRS-- Normal
-
Junctional Tach
- Rate-- 100-180 bpm
- Rhythm-- R
- P Wave-- May be inverted, missing, b/f, aft or lost in QRS
- PRI-- None
- QRS-- Normal
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2nd Degree Type I (Wenckebach)
- Rate-- Atrial = Normal ; Ventricular = Slower than atrial
- Rhythm-- R-IR
- P Waves-- Present
- PRI-- Variable (longer, longer, longer, gone)
- QRS-- Normal
-
Ventricular Escape (Agonal)
- Rate-- Depends on underlying rhythm
- Rhythm-- IR
- P Waves-- Not present b/f PVC
- PRI-- None
- QRS-- Widened, > 0.12 sec
-
Idioventricular
- Rate-- 20-40 bpm
- Rhythm-- Reg
- P Waves-- None
- PRI-- None
- QRS-- Wide > 0.12 sec
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