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14 Cards in this Set

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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?
Junctional Arrhythmias
In Junctional arrhythmias, if the Ventricles depolarize before tha atria, the QRS wave will be?
QRS will be come before the P wave!
In Junctional arrhythmias, if the atria depolarize before the ventricles, the P wave will be?
The P wave will precede the QRS!
In Junctional arrythmias, if the atria & ventricles depolarize at the same time, the P wave will be?
The P wave will be hidden in the QRS!
The biggest clue to a Junctional arrhythmias is the inverted _____ if visible?
The inverted P wave.
Name the four Junctional arrhythmias?
1.Premature Junct. rhythm
2.Junctional Escape rhythm
3.Accelerated Junct. rhythm
4.Junctional Tachycardia
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)
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
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.
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
What is the firing rate for Junctional Escape?
.40 - .60 bpm
What is the firing rate for Accelerated Junctional Rhythm?
.60 - 100 bpm
What is the rate for Junctional Tachycardia
100 - 180 bpm
This means "firing backwards" and when the impulse travels in the "Opposite" direction it usually takes?
Retrograde