Deck 7: Heart Blocks

Question 1

In 2:1 AV block,_____.

A) the atrial rhythm (P-P interval)is regular
B) the ventricular rhythm (R-R interval)is irregular
C) the PR interval lengthens until a P wave appears with no QRS complex
D) there is no PR interval because the atria and ventricles beat independently of each other

Answer 1

A
Second-degree 2:1 AV block is characterized by P waves that are normal in size and shape,but every other P wave is not followed by a QRS.The atrial rate is twice the ventricular rate.

Question 2

Complete the following ECG criteria for third-degree AV block:

Answer 2

Question 3

Second-degree AV block type I is characterized by _____ intervals.

A) irregular P to P
B) regular R to R
C) regular P to P intervals and irregular R to R
D) irregular P to P intervals and irregular R to R

Answer 3

C
Second-degree AV block type I is characterized by an irregular ventricular rhythm (i.e.,irregular R to R intervals),more P waves than QRS complexes,and P waves that occur regularly (i.e.,regular P to P intervals).

Question 4

Second-degree AV block type II is characterized by _____ intervals.

A) irregular P to P
B) irregular R to R
C) regular P to P intervals and regular R to R
D) irregular P to P intervals and irregular R to R

Question 5

In second-degree AV block type I,the PR interval _____.

A) shortens
B) is absent
C) is inconstant
D) remains constant

Question 6

The ventricular rhythm is regular in second-degree AV block type I.

Question 7

Complete the following ECG criteria for second-degree AV block type I:

Question 8

A 2:1 AV block is characterized by _____ intervals.

A) irregular P to P
B) irregular R to R
C) regular P to P intervals and regular R to R
D) irregular P to P intervals and regular R to R

Question 9

Indicate the ECG criteria for the following dysrhythmias:

Question 10

An ECG rhythm strip shows a regular ventricular rhythm at a rate of 30 beats/min,more P waves than QRS complexes (the P waves occur regularly),a variable PR interval,and a QRS duration of 0.14 seconds.This rhythm is _____.

A) 2:1 AV block
B) third-degree AV block
C) second-degree AV block type I
D) second-degree AV block type II

Question 11

In third-degree AV block,_____.

A) the atrial rhythm (P-P interval)is irregular
B) the ventricular rhythm (R-R interval)is irregular
C) there is no PR interval because the atria and ventricles beat independently of each other
D) the PR interval after a nonconducted P wave is shorter than the interval preceding the nonconducted beat

Question 12

A _____ bundle branch block produces a RSR pattern in lead V?.

Question 13

In 2:1 AV block,the PR interval _____.

A) shortens
B) lengthens
C) is absent
D) remains constant

Question 14

Most of the bundle branch tissue is supplied by the _____ coronary artery.

A) right
B) left

Question 15

In second-degree and third-degree AV blocks,_____.

A) P waves occur regularly
B) every other P wave is dropped
C) P waves are periodically dropped
D) there are more QRS complexes than P waves

Question 16

A _____ bundle branch block produces a QS pattern in lead V?.

Question 17

The QRS complex associated with a third-degree AV block is always wide.

Question 18

Complete the following ECG criteria for 2:1 AV block:

Question 19

The PR interval of a first-degree AV block _____.

A) is constant and less than 0.12 seconds in duration
B) is constant and more than 0.20 seconds in duration
C) is generally progressive until a P wave appears without a QRS complex
D) gradually decreases in duration until a P wave appears without a QRS complex

Question 20

Complete the following ECG criteria for second-degree AV block type II:

Question 21

Identify the following rhythm: _________________________

Question 22

Identify the following rhythm: _________________________

Question 23

Identify the following rhythm: _________________________

Question 24

Identify the following rhythm: _________________________

Question 25

Identify the following rhythm: _________________________

Question 26

Identify the following rhythm: _________________________

Question 27

Identify the following rhythm: _________________________

Question 28

Complete the following ECG criteria for first-degree AV block:

Question 29

Identify the following rhythm: _________________________

Question 30

Identify the following rhythm: _________________________

Question 31

Identify the following rhythm: _________________________

Question 32

Identify the following rhythm: _________________________

Question 33

Identify the following rhythm: _________________________

Question 34

Identify the following rhythm: _________________________

Question 35

Identify the following rhythm: _________________________

Question 36

Identify the following rhythm: _________________________

Question 37

Identify the following rhythm: _________________________

Question 38

Identify the following rhythm: _________________________

Question 39

Identify the following rhythm: _________________________

Question 40

Identify the following rhythm: _________________________

Question 41

Indicate the ECG criteria for the following dysrhythmias.

Question 42

Indicate the ECG criteria for the following dysrhythmias.

Question 43

Identify the following rhythm: _________________________

Question 44

Identify the following rhythm: _________________________

Question 45

Identify the following rhythm: _________________________

Question 46

Identify the following rhythm: _________________________

Question 47

Identify the following rhythm: _________________________

Question 48

Identify the following rhythm: _________________________