Deck 7: Rhythms Originating in the Sinus Node

Question 1

The rhythm in Figure 4 is

A)Sinus rhythm.
B)Sinus bradycardia.
C)Sinus rhythm with sinus arrest.
D)Sinus tachycardia.

Answer 1

A

Question 2

Which of the following has a heart rate less than 60?

A)Sinus rhythm
B)Sinus bradycardia
C)Sinus tachycardia
D)Atrial tachycardia

Answer 2

B

Question 3

All sinus rhythms have

A)Upright,matching P waves.
B)Wide,bizarre QRS complexes.
C)Multiple P waves of varying configurations.
D)Heart rates between 40 and 100.

Answer 3

A

Question 4

Sinus tachycardia's heart rate is

A)60-100.
B)Greater than 100.
C)Less than 60.
D)Greater than 170.

Question 5

In Figure 5,the rhythm shown is

A)Sinus rhythm.
B)Sinus bradycardia.
C)Sinus tachycardia.
D)Sinus block.

Question 6

Which of the following is true about sinus rhythm?

A)It is regular.
B)It has an irregularly irregular pattern of QRS complexes.
C)It has multiple shapes of P waves.
D)It has wide QRS complexes without preceding P waves.

Question 7

Treatment for sinus tachycardia associated with a high fever would be to

A)Give atropine.
B)Start CPR.
C)Give acetaminophen or ibuprofen to get the temperature down.
D)Give beta-blockers.

Question 8

Atropine's mode of action is to

A)Speed up the rate of sinus node firing and speed conduction through the AV node.
B)Speed impulse conduction through the bundle branches and AV node.
C)Slow the rate of conduction through the AV node and slow sinus node firing.
D)Speed sinus node firing and slow AV node conduction.

Question 9

In sinus block,

A)The pause is a multiple of the R-R intervals.
B)There are P waves inside the pause.
C)All R-R intervals are constant.
D)The heart rate varies from 100 to 160.

Question 10

The heart rate in Figure 4 is closest to

A)100.
B)70.
C)150.
D)50.

Question 11

A pause that occurs when the sinus node's impulse is not conducted out of the sinus node itself is

A)Sinus arrest.
B)Sinus arrhythmia.
C)Sinus bradycardia.
D)Sinus block.

Question 12

Which of the following sinus rhythms would be expected with stimulation of the sympathetic nervous system?

A)Sinus rhythm rate 68
B)Sinus bradycardia rate 45
C)Sinus arrhythmia rate 45-73
D)Sinus tachycardia rate 125

Question 13

In Figure 5,the heart rate is closest to

A)100.
B)40.
C)75.
D)55.

Question 14

Sinus arrhythmia is

A)A regular rhythm.
B)An irregular rhythm.
C)A rhythm that originates in the atria.
D)A rhythm that originates in the AV junction.

Question 15

QRS interval in Figure 4 is closest to

A)0.42 seconds.
B)0.10 seconds.
C)0.28 seconds.
D)0.30 seconds.

Question 16

In sinus rhythm,the heart rate is

A)60-100.
B)Greater than 100.
C)Less than 60.
D)Greater than 170.

Question 17

The sinus rhythm that has a heart rate greater than 100 is

A)Sinus rhythm.
B)Sinus bradycardia.
C)Sinus tachycardia.
D)Sinus arrhythmia.

Question 18

Sinus bradycardia's heart rate is

A)60-100.
B)Greater than 100.
C)Less than 60.
D)Greater than 170.

Question 19

Atropine is a medication that would be appropriate for symptomatic

A)Sinus tachycardia.
B)Sinus bradycardia.
C)Sinus rhythm.
D)None of the above.

Question 20

PR interval in Figure 4 is closest to

A)0.12 seconds.
B)0.28 seconds.
C)0.04 seconds.
D)0.40 seconds.

Question 21

High fever is a common cause of sinus arrest.

Question 22

The heart rate during sinus tachycardia is less than 60.

Question 23

Which of the following is an irregular rhythm originating in the sinus node?

A)Sinus arrhythmia
B)Sinus rhythm
C)Sinus tachycardia
D)Sinus bradycardia

Question 24

Thyrotoxicosis is a condition associated with which rhythm?

A)Sinus block
B)Sinus arrest
C)Sinus tachycardia
D)Sinus bradycardia

Question 25

A junctional escape beat is a beat from the

A)Ventricle.
B)AV junction.
C)Bundle branches.
D)Sinus node.

Question 26

Sinus arrhythmia has a pattern that often corresponds with the

A)PR intervals.
B)Breathing pattern.
C)P-P intervals.
D)Patient's age.

Question 27

The heart rate during sinus bradycardia is greater than 100.

Question 28

In which rhythm is an escape beat sometimes seen?

A)Sinus rhythm
B)Sinus bradycardia
C)Sinus arrhythmia
D)Sinus arrest

Question 29

An artificial pacemaker can be used to treat sinus bradycardia.

Question 30

A pacemaker is usually needed to treat sinus bradycardia.

Question 31

Some signs of decreased cardiac output are pallor,hypotension,and dizziness.

Question 32

The heart rate during sinus rhythm is 60-100.

Question 33

The only difference in interpretation criteria between sinus rhythm,sinus bradycardia,and sinus tachycardia is the heart rate.

Question 34

Diaphoresis is a cold sweat.

Question 35

Atropine speeds conduction through the bundle branches.

Question 36

Patients with a heart rate of 45 always show symptoms of decreased cardiac output.

Question 37

Atropine is the drug of choice to treat sinus tachycardia.

Question 38

Oxygen can help return an abnormal heart rhythm to normal.

Question 39

In sinus arrhythmia,the heart rate

A)Speeds up during inspiration and expiration.
B)Speeds up during inspiration,slows during expiration.
C)Slows during inspiration and expiration.
D)Slows during inspiration,speeds up during expiration.

Question 40

High fever can cause sinus tachycardia.

Question 41

_____ is the only normal heart rhythm.

Question 42

Once the impulse originates in the sinus node,it travels next to the _____ by way of the interatrial tracts.

Question 43

The PR interval in sinus rhythms should be _____ from beat to beat.

Question 44

A rhythm with a heart rate less than 60 is _____.

Question 45

_____ is a rhythm with a heart rate greater than 100.

Question 46

The most crucial criterion to identifying sinus rhythms is the upright matching P waves in lead II.

Question 47

All sinus rhythms have a P-QRS-T configuration.

Question 48

Sinus bradycardia is common among well-conditioned athletes.

Question 49

Sinus block can occur at any heart rate.

Question 50

In a sinus arrest,the sinus node_____ firing for a time.

Question 51

Sinus arrest can occur at any heart rate.

Question 52

The primary treatment of sinus tachycardia is _____.

Question 53

In sinus rhythms,the QRS complexes should have an interval of _____.

Question 54

A condition in which the thyroid gland overproduces thyroid hormones and causes the heart rate,temperature,and blood pressure to rise to dangerous levels is called _____.

Question 55

In sinus rhythms,P waves are found _____ the QRS complexes.

Question 56

Sinus arrest is best treated by anti-anxiety medication.