Deck 11: Av Blocks

Question 1

Which strip in Figure 17 is consistent with Mobitz I second-degree AV block (Wenckebach)?

A)A
B)B
C)C
D)D

Answer 1

B

Question 2

Which strip in Figure 17 is consistent with third-degree AV block?

A)A
B)B
C)C
D)D

Answer 2

D

Question 3

The type of AV block characterized by a prolonged PR interval is

A)Wenckebach.
B)Mobitz II second-degree AV block.
C)Third-degree AV block.
D)First-degree AV block.

Answer 3

D

Question 4

In third-degree AV block,if the block is at the AV node,

A)The QRS will be wide and bizarre.
B)The P waves will be tall and pointy.
C)The QRS will be narrow.
D)There will be no P waves.

Question 5

The type of AV block characterized by two P waves to each QRS and a constant PR interval is

A)First-degree AV block.
B)Third-degree AV block.
C)Wenckebach.
D)2:1 AV block.

Question 6

The QRS interval in Figure 18 is closest to

A)0.12 seconds.
B)0.20 seconds.
C)0.32 seconds.
D)0.40 seconds.

Question 7

In third-degree AV block,the site of the block is either the

A)Sinus node or the internodal tracts.
B)AV node or the Purkinje fibers.
C)Bundle branches or the AV node.
D)Sinus node or the AV node.

Question 8

Which strip in Figure 17 is consistent with sinus rhythm with first-degree AV block?

A)A
B)B
C)C
D)D

Question 9

AV dissociation is a hallmark of

A)First-degree AV block.
B)Mobitz I second-degree AV block (Wenckebach).
C)Mobitz II second-degree AV block.
D)Third-degree AV block.

Question 10

Which strip in Figure 17 is consistent with Mobitz II second-degree AV block?

A)A
B)B
C)C
D)D

Question 11

In which kind of AV block do NONE of the sinus impulses reach the ventricles?

A)First-degree AV block
B)Wenckebach
C)Mobitz II second-degree AV block
D)Third-degree AV block

Question 12

Complete heart block is another name for

A)Wenckebach.
B)Mobitz II second-degree AV block.
C)Third-degree AV block.
D)First-degree AV block.

Question 13

Wenckebach is a type of

A)First-degree AV block.
B)Second-degree AV block.
C)Third-degree AV block.
D)Fourth-degree AV block.

Question 14

Third-degree AV block has

A)One P wave to each QRS.
B)A varying R-R interval.
C)A constant PR interval.
D)A varying PR interval.

Question 15

In AV blocks,the P-P interval is

A)Regular.
B)Irregular.
C)Absent.
D)The same as the R-R interval.

Question 16

The PR interval in Figure 18

A)Is constant.
B)Varies.
C)Is about 0.12 seconds.
D)Is about 0.20 seconds.

Question 17

The rhythm in Figure 18 is

A)Wenckebach.
B)Mobitz II second-degree AV block.
C)Third-degree AV block.
D)Junctional bradycardia.

Question 18

In first-degree AV block,the site of the block is the

A)Sinus node.
B)AV node.
C)Interatrial tracts.
D)Bundle branches.

Question 19

In Figure 18,which of the heart's pacemakers is controlling the ventricle?

A)Sinus node
B)Atrium
C)AV node
D)Ventricle

Question 20

2:1 AV block can be either

A)Third-degree AV block or Wenckebach.
B)Wenckebach or Mobitz II second-degree AV block.
C)First-degree AV block or Wenckebach.
D)Mobitz II second-degree AV block or third-degree AV block.

Question 21

Treatment for third-degree AV block usually includes

A)Digitalis.
B)Lidocaine.
C)Amiodarone.
D)Pacemaker.

Question 22

In third-degree AV block,none of the sinus impulses get through to the ventricles.

Question 23

Third-degree AV block is also called Wenckebach.

Question 24

All AV blocks involve a disturbance in conduction somewhere between the atria and the ventricles.

Question 25

Wenckebach is characterized by

A)Gradually prolonging PR intervals.
B)Constant PR intervals.
C)Absent P waves.
D)Wide bizarre QRS complexes.

Question 26

In first-degree AV block,all sinus impulses do get through to the ventricles.

Question 27

Pacemakers are typically used for Mobitz II second-degree AV block and third-degree AV block.

Question 28

In Mobitz II second-degree AV block,where do the P waves originate?

A)Sinus node
B)AV node
C)Atrium
D)Ventricle

Question 29

Wenckebach usually does not need treatment.

Question 30

All AV blocks are caused by a block at the bundle branches.

Question 31

Treatment for first-degree AV block involves

A)Atropine.
B)Digitalis.
C)Electrical shock to the heart.
D)Removing the cause.

Question 32

The AV blocks with a constant PR interval are

A)First-degree AV block and Wenckebach.
B)Wenckebach and third-degree AV block.
C)First-degree AV block and Mobitz II second-degree AV block.
D)First-degree AV block and third-degree AV block.

Question 33

The type of heart block that involves a prolonged PR interval and no dropped beats is Mobitz II second-degree AV block.

Question 34

The most dangerous of the AV blocks is Mobitz II second-degree AV block.

Question 35

In AV blocks,the site of the block is either the AV node or the bundle branches.

Question 36

Third-degree AV block usually needs no treatment.

Question 37

2:1 AV block is characterized by two P waves to every QRS.

Question 38

Mobitz II second-degree AV block can progress to third-degree AV block if left untreated.

Question 39

First-degree AV block is best treated with a pacemaker.

Question 40

First-degree AV block is characterized by a prolonged QRS interval.

Question 41

What kind of symptoms does first-degree AV block cause? _____.

Question 42

Mobitz II second-degree AV block involves a block at either the AV node or the _____.

Question 43

Why does atropine not work when the block is at the bundle branches?________________.
.

Question 44

The AV block characterized by gradually prolonging PR intervals until a QRS is blocked is _____.

Question 45

AV blocks involve a block in conduction between _____.

Question 46

Wenckebach is also known as _____.

Question 47

In a second-degree AV block,some impulses from the sinus node _____ to the ventricles;others don't.

Question 48

In third-degree AV block,_____ sinus impulses get through to the ventricles.

Question 49

The origin of the P waves in AV blocks is the _____.

Question 50

In AV blocks,the underlying rhythm is _____.