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Flashcards in Junctional Rhythms Deck (38)
0

Where do impulses go when the AV node assumes pacemaking responsibility?

In the atria and ventricles

1

What is retrograde conduction?

When the impulse spreads upwards from AV node to the atria

2

In junctional arrhythmias does the p wave precede the QRS complex consistently?

NO
Depends on whether the Atria or ventricles were depolarized first

3

What comes first if the ventricles are depolarized before the atria?

The QRS complex

4

What comes first if the atria is depolarized before the ventricles?

The P wave

5

What happens when the atria and ventricles depolarize simultaneously?

The P waves will be hidden within the QRS complex

6

How long is the PRI In junction all rhythms?

Less than .12 second

7

An inverted P wave originates in what two places?

AV node
Atria

8

What are four basic mechanisms that produce Arrhythmias in the AV junction?

Premature junctional complex
Junctional escape rhythm
Accelerated junctional rhythm
Junctional tachycardia

9

Premature junctional complex
Regularity

Depends on underlying rhythm

10

Premature junctional complex
Rate

Depends on underlying rhythm

11

Premature junctional complex
P Wave morphology (2)

Inverted
Falls before during or after QRS complex

12

Premature junctional complex
PRI

Less than .12
Only measured if precedes QRS complex

13

Premature junctional complex
QRS

Less than .12

14

Junctional escape rhythm
Regularity

Regular

15

Junctional escape rhythm
Rate

40-60

16

Junctional escape rhythm
P wave morphology

Inverted
Can fall before after or during QRS complex

17

Junctional escape rhythm
PRI

Less than .12 if p wave precedes QRS complex

18

Junctional escape rhythm
QRS

Less than .12

19

What two categories are junctional tachycardia divided into?

Accelerated junctional rhythm
Junctional tachycardia

20

What rate is the junction firing during accelerated junctional rhythm?

60-100

21

What rate is the junction firing during junctional tachycardia?

100-180

22

Accelerated junctional tachycardia
Regularity

Regular

23

Accelerated junctional tachycardia
Rate

60-100

24

Accelerated junctional tachycardia
P wave

Inverted before after or in between QRS complex

25

Accelerated junctional tachycardia
PRI

Less than .12 only if precedes QRS complex

26

Accelerated junctional tachycardia
QRS complex

Less than .12

27

Junctional tachycardia
Regularity

Regular

28

Junctional tachycardia
Rate

100-180

29

Junctional tachycardia
P Wave

Inverted
Can fall before after or in between QRS complex

30

Junctional tachycardia
PRI

Less than .12 if preceding QRS complex

31

Junctional tachycardia
QRS

Less than .12

32

What is the only difference you will see on an EKG between:
junctional escape rhythm
accelerated junctional rhythm
junctional tachycardia?

The rate

33

What is the rate for junctional escape rhythms?

40-60

34

What three junctional arrhythmias are caused by irritability?

Premature junctional complex
Junctional tachycardia
Accelerated junctional tachycardia

35

What is supraventricular tachycardia? (SVT)

Used to describe a category of several regular tachyarrythmias that can't be identified more accurately

36

When do you label an EKG as a supraventricular tachycardia?

Regular arrhythmia
Indistinguishable p wave
Similar rate ranges

37

What rate ranges do you commonly call supraventricular tachycardia?

150-250 BPM