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Paramedic > Atrial Rhythms > Flashcards

Atrial Rhythms Flashcards

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0
Q

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

A 
Flattened
Notched
Peaked
Sawtoothed
Diphasic
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1
Q

When are atrial rhythm caused?

A

When the atrial rate becomes faster than the sinus rate

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2
Q

What does diphasic mean?

A

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

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3
Q

When is the wandering pacemaker caused?

A

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

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4
Q

Wandering pacemaker

Regularity

A

Slightly irregular

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5
Q

Wandering pacemaker

Rate

A

60-100

Not more than 150

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6
Q

Wandering pacemaker

P wave morhphology

A

Morphology changes from one complex to the next

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7
Q

Wandering pacemaker

PRI time

A

Less than .20

Varies

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8
Q

Wandering pacemaker

QRS time

A

Less than .12 second

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9
Q

What is an ectopic beat?

A

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

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10
Q

When does an ectopic beat initiate?

A

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

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11
Q

An early or premature ectopic beat indicates what?

A

Irritability

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12
Q

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

A

Escape beat

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13
Q

What is an atrial ectopic caused by irritability called?

A

Premature Atrial complex (PAC)

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14
Q

Premature Atrial Complex

Regularity

A

Depends on underlying rhythm

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15
Q

Premature Atrial Complex

Rate

A

Depends on underlying rhythm

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16
Q

Premature Atrial Complex

P wave morphology (3)

A

Flattened
Notched
Lost in preceding t wave

17
Q

Premature Atrial Complex

PRI

A

.12-.20

Can exceed .20

18
Q

Premature Atrial Complex

QRS

A

Less than .12

19
Q

What is atrial tachycardia?

A

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

20
Q

Atrial tachycardia

Regularity

A

Regular

21
Q

Atrial tachycardia

Rate

A

150-250

22
Q

Atrial tachycardia

P wave morphology

A

Atrial p waves (flattened, notched, diphasic)

Can be lost in t wave

23
Q

Atrial tachycardia

PRI time

A

.12-.20

24
Q

Atrial tachycardia

QRS time

A

Less than .12

25
Q

What is atrial flutter?

A

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

26
Q

What is a variable block?

A

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
Q

Atrial flutter

Regularity

A

Atrial rhythm is regular

Ventricle rhythm usually is regular unless there’s a variable block

28
Q

Atrial flutter

Rate

A

250-350

29
Q

Atrial flutter

P wave morphology

A

Sawtooth pattern

30
Q

Atrial flutter

PRI

A

Unable to determine

31
Q

Atrial flutter

QRS

A

Less than .12 second

32
Q

What is atrial fibrillation?

A

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

33
Q

What are the fibrillatory waves of atrial fibrillation called?

A

f waves

34
Q

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

A

Atrial fibrillation with a rate greater than 100

35
Q

Atrial fibrillation

Regularity

A

Grossly irregular

36
Q

Atrial fibrillation

Rate

A

Atrial rate greater than 350

Ventricular rate varies

37
Q

Atrial fibrillation

P wave morphology

A

No discernible p waves (f waves)

38
Q

Atrial fibrillation

PRI

A

Unable to measure

39
Q

Atrial fibrillation

QRS

A

Less than .12

40
Q

What are little f waves a sign of?

A

Fibrillation

41
Q

What are big F waves used for?

A

Fluttering

Paramedic (31 decks)

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