Unit 5

Question 1

Normal QRS is ____ seconds

Answer 1

0.04 - 0.12

Question 2

Normal PR interval is ____ seconds

Answer 2

0.12 - 0.20

Question 3

What wave represents ventricular depolarization?

Answer 3

T wave

Question 4

Ischemia is noted on an EKG by the presence of:

Answer 4

ST depression

Question 5

What are the characteristics of a sinus rhythm

Answer 5

Has a P wave, originates in atria, has a regular rhythm,

Question 6

Why is atropine given?

Answer 6

Increase heart rate

Question 7

What drug is given to treat the excitability of ectopic foci (ex. PVC)?

Answer 7

Lidocaine

Question 8

In children (1-8 years) bradycardia occurs at a rate of less than ____ bpm

Answer 8

80 bpm

Question 9

Which of the following delivered energy settings should the respiratory therapy practitioner recommend for initial attempts at defibrillation when performed on an adult patient?

Answer 9

200 joules

Question 10

During synchronized cardioversion, the defibrillator will discharge on the ____ wave

Answer 10

R

Question 11

The immediate and only effective treatment of ventricular fibrillation is _____

Answer 11

Defibrillation

Question 12

Hypoxemia such as in a COPD patient would most likely cause what rhythm?

Answer 12

PVC

Question 13

The ability of cardiac muscles to respond to an electrical stimulus by physically contracting

Answer 13

Contractility

Question 14

The ability of all cardiac cells to conduct electrical impulses from one group of cells to another in any pathway or direction

Answer 14

Conductivity

Question 15

A basic rate and rhythm assigned to a specific group of cardiac cells

Answer 15

Rhythmicity

Question 16

The excitability of the cardiac cell

Answer 16

Irritability

Question 17

The ability of each cardiac cell to automatically initiate an electrical event

Answer 17

Automaticity

Question 18

List the 5 cardiac properties

Answer 18

Automaticity, Irritability, rhythmicity, conductivity, and contractility

Question 19

If there is a conduction defect from the A-V node to the Bundle of His what would you see?

Answer 19

Long PR interval

Question 20

A short run of V-tach occurs with ____ PVC’s

Answer 20

3

Question 21

A “u” wave represents___

Answer 21

Hypokalemia

Question 22

When could you use Synchronized cardioversion?

Answer 22

To treat PAT, SVT, A-fib, A-flutter, and V-tach

Question 23

What is the unique characteristics that occurs with a BBB (Bundle Branch Block)?

Answer 23

There is a notch in the QRS complex

Question 24

Where is the tricuspid valve located?

Answer 24

Between the right ventricle and right atrium

Question 25

What causes CHF to occur?

Answer 25

Coronary artery disease or anything that causes left ventricle to inadequately pump

Question 26

During defibrillation and cardioversion, the paddles are placed on the ___ lateral chest and the ___ apex

Answer 26

Left, right

Question 27

R on T phenomenon results in _____

Answer 27

Ventricular tachycardia

Question 28

What is normal pulse rate in a child?

Answer 28

80-120 bpm

Question 29

What is a normal pulse rate in an adult?

Answer 29

60-100 bpm

Question 30

What medication will slow down a fast heart rate?

Answer 30

Beta-blockers

Question 31

On an EKG tracing, a conduction defect from the SA to AV node would be noted by _____

Answer 31

Long PR interval

Question 32

When performing an EKG, the ground lead is found on the ____

Answer 32

Right leg

Question 33

Where are the chest leads placed on an EKG?

Answer 33

V1 - Fourth intercostal space to the right of the sternum V2 - Fourth intercostal space to the left of the sternum V3 - Between V2 and V4 V4 - Fifth left intercostal space, midclavicular line V5 - Level of V4, left anterior axillary line V6 - Fifth intercostal space at the left midaxillary line

Question 34

Which heart block is being described: P waves do not correlate with complexes

Answer 34

Third degree A-V block

Question 35

Which heart block is being described: Progressive widening of the P-R interval

Answer 35

Second degree A-V block mobitz type I

Question 36

Which heart block is being described: Extra P wave between each complex with no warning

Answer 36

Second degree A-V heart block mobitz type II

Question 37

Which heart block is being described: Widened PR interval

Question 38

Holter monitoring is usually performed for ___ or ___ hours. The ECG records ___ channels with the placement with the placement of ___ chest electrodes.

Answer 38

24, 48, 2, 5

Question 39

Joules sequence for defibrillation

Answer 39

1st attempt: 200 joules 2nd attempt: 300 joules 3rd attempt: 360 joules 4th attempt: 360 joules

Question 40

List the point of electrical conduction in the heart

Answer 40

SA node, AV node, Bundle of His, Right and Left bundle branches, and Purkinjie fibers

Question 41

What does the QRS represent

Answer 41

Ventricular depolarization

Question 42

What would you see if there was a conduction delay at the AV node?

Answer 42

Long PR interval

Question 43

What are ectopic foci?

Answer 43

Impulses that originate from sites other than the SA node

Question 44

True or False: R-R interval is peak to peak, and this should always be equal distance. If not, the rhythm is considered irregular

Answer 44

True

Question 45

What is the intrinsic rate of the SA node?

Answer 45

60-100 bpm

Question 46

What does the P wave represent?

Answer 46

Contraction of the SA node

Question 47

How long is a normal P wave?

Answer 47

0.12 seconds

Question 48

How many leads do we place when doing a 12 lead EKG?

Answer 48

10

Question 49

When does the defibrillator discharge the electrical shock in synchronized cardioversion?

Answer 49

On the R wave

Question 50

What would you recommend for sinus bradycardia?

Answer 50

Atropine