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Atrial Flutter
- may be regular or irregular
- more than one flutter wave/QRS (2:1, 3:1)
- Atrial rate: 250-350/min
- QRS < .12 (flutter waves may conceal QRS)
Very jagged marks (saw toothed)
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Sinus pause
- Rate 60-100
- Regularity interrupted by pause
- (no p waves, no QRS)
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Sinus arrhythmia
- Average rate 60-100 bpm
- Speed up with breathing and slow back down rhythm irregular
- R-R interval changes must vary by greater than .12 sec
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Atrial Tachycardia
- p wave different (peaked, notched, flattened, diphasic)
- 150-250 bpm faster than sinus
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Supraventricular tachycardia (SVT)
- Rate (140+, 150-250 bpm)
- ccannot see p waves
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1st Degree AV block
- not true block. The AV holds impulse longer than normal when reaches the ventricles the impulse is normal
- PR > .2 sec (5 little boxes)
- PRI constant from one beat to the next
- Must always state underlying rhythm
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Junctional Escape Rhythm
- back up pace maker when SA doesn't fire.
- If p wave seen, will be inverted before or after QRS
- Rate: 40-60 bpm
- Rhythm: rhythm
- PR < .12 (if before)
- ST Normal
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Accelerated Junctional Rhythm
Junctional Tachycardia
- irritibility of tissue sends out impulses competing with SA node and takes over functions of the heart
- Rate 60-100 bpm
Junctional tachy > 100 bpm
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2nd Degree AV Block Type 2
- intermittent block @ AV node
- PR intervals constant
- more p waves than QRS complexes
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3rd Degree AV Block
- complete block of AV node; junctional or ventricle impulses compensate.
- more P waves than QRS comples
- P waves are NOT related to QRS complexes
- PRI completely variable
- AR normal range (60-100) bpm
- VR: if junctional (40-60
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2nd Degree AV Block Type 1
- There are some P waves NOT followed by QRS comples
- PRI get progressively longer until not followed by QRS, after blocked beat, the cycle restarts.
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Premature Junctional Contraction (PJC)
- The ectopic impulse stimulates the atria and/or ventricles earlier than sinus impulse (intermittently)
- EKG sinus rhythm, PJC, slight pause, sinus rhythm resumes, sinus rhythm resumes.
- P wave inverted with PR <.12 not seen @ all, QRS followed by inverted p wave
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