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Paramedic > Heart Blocks > Flashcards

Heart Blocks Flashcards

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0
Q

What does a first degree heart block indicate?

A

Obstruction at the AV node is not complete. There’s a delay before being transmitted to the ventricles.

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1
Q

What is a heart block?

A

The result of conduction disturbances in the AV node

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2
Q

What is a second degree heart block?

A

The block is intermittent. Some impulses will be conducted to the ventricles but not others

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3
Q

What is a third degree heart block?

A

The block is complete and no impulses will be conducted to the ventricles

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4
Q

What is another name for third degree heart block?

A

Compete heart block

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5
Q

What are the four types of heart blocks?

A

First degree
Second degree type 1
Second degree type 2
Third degree

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6
Q

What is a subcategory of type 1 second degree heart blocks?

A

Wenckebach

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7
Q

First degree heart block

Regularity

A

Depends on underlying rhythm

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8
Q

First degree heart block

Rate

A

Depends on underlying rhythm

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9
Q

First degree heart block

P waves

A

Upright

Uniform

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10
Q

First degree heart block

PRI

A

Greater than .20 constant

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11
Q

First degree heart block

QRS

A

Less than .12

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12
Q

With second degree heart blocks what gets depolarized more; atria or ventricles?

A

Atria because the AV node blocks some impulses from being conducted to ventricles

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13
Q

What is variable conduction?

A

The ratio of P waves to QRS completes change across a strip

2:1 3:1 3:1 2:1

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14
Q

Type 2 second degree heart block

Regularity

A

RRI can be regular or irregular

PPI is regular

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15
Q

Type 2 second degree heart block

Rate

A

Usually bradycardia can be one half to one third the normal rate

16
Q

Type 2 second degree heart block

P waves

A

Upright uniform

More P waves than QRS complexes

17
Q

Type 2 second degree heart block

PRI

A

Constant

Can be greater than .20

18
Q

Type 2 second degree heart block

QRS

A

Less than .12

19
Q

What happens to PRI in Wenckebach 2nd degree heart blocks?

A

The PRI get progressively longer until you don’t see a QRS complex

20
Q

Wenckebach Type 1 second degree heart block

Regularity

A

Irregular

21
Q

Wenckebach Type 1 second degree heart block

Rate

A

Slightly slower than normal

22
Q 
Wenckebach Type 1 second degree heart block
P waves (3)
A

Upright
Uniform
Some p waves not followed by QRS complexes

23
Q

Wenckebach Type 1 second degree heart block

PRI

A

Progressively longer until P wave is blocked

24
Q

Wenckebach Type 1 second degree heart block

QRS

A

Less than .12

25
Q

If the rate is 20-40 and QRS is greater than .12 where are the impulses originated?

A

Ventricles

26
Q

If the rate is 40-60 and the QRS is less than .12 where are the impulses originated?

A

AV junction

27
Q

What occurs when two pacemakers control the upper and lower chambers of the heart without regard for each other?

A

Atrioventricular dissociation

28
Q

What is the relationship of p waves and QRS complexes in complete heart blocks?

A

There is no relationship between the two

29
Q

What is the distinction between Wenckebach and complete heart blocks?

A

The RRI in complete heart blocks are regular

The RRI in Wenckebach are irregular

30
Q

Third degree heart block

Regularity

A

Regular

31
Q

Third degree heart block

Rate

A

AR normal

VR 40-60 if junctional 20-40 if ventricular

32
Q 
Third degree heart block
P waves (3)
A

Upright
Uniform
More p waves than QRS complexes

33
Q

Third degree heart block

PRI

A

No relationship between p waves and QRS complexes

34
Q

Third degree heart block

QRS

A

Less than .12 if junctional

More than .12 if ventricular

Paramedic (31 decks)

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