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
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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