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Flashcards in Atrial Rhythms Deck (42):
0

When are atrial rhythm caused?

When the atrial rate becomes faster than the sinus rate

1

How is the morphology of atrial arrhythmia's P-wave (5)

Flattened
Notched
Peaked
Sawtoothed
Diphasic

2

What does diphasic mean?

There is an upward deflection and then dips below the isoelectric line

3

When is the wandering pacemaker caused?

When the pacemaker role switches from beat to beat from the SA node to the atria and back again

4

Wandering pacemaker
Regularity

Slightly irregular

5

Wandering pacemaker
Rate

60-100
Not more than 150

6

Wandering pacemaker
P wave morhphology

Morphology changes from one complex to the next

7

Wandering pacemaker
PRI time

Less than .20
Varies

8

Wandering pacemaker
QRS time

Less than .12 second

9

What is an ectopic beat?

A single beat that arises from a focus outside the SA node

10

When does an ectopic beat initiate?

When a site somewhere becomes irritable and overrides the SA node for a single beat

11

An early or premature ectopic beat indicates what?

Irritability

12

An ectopic beat that is preceded by a prolonged R-R cycle is what?

Escape beat

13

What is an atrial ectopic caused by irritability called?

Premature Atrial complex (PAC)

14

Premature Atrial Complex
Regularity

Depends on underlying rhythm

15

Premature Atrial Complex
Rate

Depends on underlying rhythm

16

Premature Atrial Complex
P wave morphology (3)

Flattened
Notched
Lost in preceding t wave

17

Premature Atrial Complex
PRI

.12-.20
Can exceed .20

18

Premature Atrial Complex
QRS

Less than .12

19

What is atrial tachycardia?

When a single focus in the atria become so irritable it overrides the SA node for the entire rhythm

20

Atrial tachycardia
Regularity

Regular

21

Atrial tachycardia
Rate

150-250

22

Atrial tachycardia
P wave morphology

Atrial p waves (flattened, notched, diphasic)
Can be lost in t wave

23

Atrial tachycardia
PRI time

.12-.20

24

Atrial tachycardia
QRS time

Less than .12

25

What is atrial flutter?

When the atrial become so irritable that they fire faster than 250 bpm

26

What is a variable block?

When the AV node becomes very erratic about conducting impulses the ratio between F waves and QRS complexes can vary which creates and irregular RRI

27

Atrial flutter
Regularity

Atrial rhythm is regular
Ventricle rhythm usually is regular unless there's a variable block

28

Atrial flutter
Rate

250-350

29

Atrial flutter
P wave morphology

Sawtooth pattern

30

Atrial flutter
PRI

Unable to determine

31

Atrial flutter
QRS

Less than .12 second

32

What is atrial fibrillation?

When the atrial become so irritable they are no longer beating but are quivering ineffectively

33

What are the fibrillatory waves of atrial fibrillation called?

f waves

34

What is atrial fibrillation with a rapid ventricular response (uncontrolled)?

Atrial fibrillation with a rate greater than 100

35

Atrial fibrillation
Regularity

Grossly irregular

36

Atrial fibrillation
Rate

Atrial rate greater than 350
Ventricular rate varies

37

Atrial fibrillation
P wave morphology

No discernible p waves (f waves)

38

Atrial fibrillation
PRI

Unable to measure

39

Atrial fibrillation
QRS

Less than .12

40

What are little f waves a sign of?

Fibrillation

41

What are big F waves used for?

Fluttering