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14 Cards in this Set
- Front
- Back
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These are Arrhythmias that originate between the AV junction & Bundle of His, because the impulse spreads in two directions at the same time in a "backward" fashon and depolarize the atria & ventricles at nearly the same time?
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Junctional Arrhythmias
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In Junctional arrhythmias, if the Ventricles depolarize before tha atria, the QRS wave will be?
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QRS will be come before the P wave!
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In Junctional arrhythmias, if the atria depolarize before the ventricles, the P wave will be?
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The P wave will precede the QRS!
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In Junctional arrythmias, if the atria & ventricles depolarize at the same time, the P wave will be?
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The P wave will be hidden in the QRS!
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The biggest clue to a Junctional arrhythmias is the inverted _____ if visible?
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The inverted P wave.
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Name the four Junctional arrhythmias?
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1.Premature Junct. rhythm
2.Junctional Escape rhythm 3.Accelerated Junct. rhythm 4.Junctional Tachycardia |
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Regularity: single premature ectopic beat,will interupt the underlying rhythm. R-R will be irregular.
Rate: HR will depend on the rate of the underlying rhythm. P: can before or after QRS, depending on contraction.If visible,will be inverted. PRI: if P wave precedes QRS, will be less that .12 sec. If P wave within or after QRS, no PRI present. QRS: less than .12 sec. |
Premature Junctional Contraction (PJC)
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Regularity: Rhythm is regular.
Rate: 40-60 bpm. P: usually no P wave, if visible it will inverted or caught in QRS. PRI: can be measured only if P wave precedes the QRS. will be less than .12 sec. QRS: less than .12 sec. |
Junctional Escape Rhythm
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Regularity: regular
Rate: 60 - 100 bpm. P: will be inverted; can fall within or after QRS or hidden in QRS. PRI: can be measured only if the P wave precedes the QRS, if can measure it will be less than .12 sec. QRS: less than .12 sec. |
Accelerated Junctional Rhythm.
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Regularity: regular
Rate: 100-180 bpm P: inverted; can be within or after QRS or hidden in QRS. PRI: can be measured only if P wave precedes QRS, if measurable will be less than .12sec. QRS: less than .12 sec. |
Junctional Tachycardia
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What is the firing rate for Junctional Escape?
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.40 - .60 bpm
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What is the firing rate for Accelerated Junctional Rhythm?
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.60 - 100 bpm
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What is the rate for Junctional Tachycardia
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100 - 180 bpm
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This means "firing backwards" and when the impulse travels in the "Opposite" direction it usually takes?
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Retrograde
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