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EKG Interpretation > Summer 2023 > Flashcards

Summer 2023 Flashcards

1
Q

Arteries carry blood way from the heart except the arteries that provide blood to the heart.
T/F

A

T

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2
Q

The heart is influenced by the sympathetic and parasympathetic nervous systems.
T/F

A

True

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3
Q

One small box is how many seconds?

A

0.04

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4
Q

Refractory means ____ to

A

resistant

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5
Q

Normal QRS interval is ______ seconds or less than three small blocks

A

.12

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6
Q

The pacemaker with the slowest inherent rate is the _______

A

ventricles

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7
Q

The cardiac cell at rest has what kind of electrical charge?

A

negative

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8
Q

Depolarization

A

electrical event that should result in muscle contraction.

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9
Q

The action potential, phase O is

A

depolarization

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10
Q

In the action potential, phase 3 is

A

rapid repolarization

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11
Q

Phase 0 of the action potential corresponds with what wave or complex on the EKG?

A

QRS complex

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12
Q

+20 mV is the

A

transmembrane potential at the conclusion of phase 0 of the action potential

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13
Q

The relative refractory period extends from the

A

upstroke of the T wave to the end of the T wave.

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14
Q

The P wave represents

A

atrial deoplarization

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15
Q

The QRS complex represents

A

ventricular repolarization

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16
Q

The T wave represents

A

ventricular repolarization

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17
Q

An upward deflection of the QRS complex is called a(n)

A

R wave

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18
Q

The normal pacemaker of the heart is the

A

Sinus node

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19
Q

Which of the following characteristics of heart cells is mechanical?

A

Contractility

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20
Q

What is TRUE about the following intervals: PR 0.14, QRS 0.08?

A

intervals are normal

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21
Q

On EKG paper, one big block represents

A

0.20 seconds

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22
Q

The EKG is a recording of the

A

heart’s electrical activity

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23
Q

What are the leads that apply to triaxial diagrams?

A

Includes 3 leads. leads I, II, and III

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24
Q

V1

A

4th ICS, RSB

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25
Q

V2

A

4th ICS, LSB

26
Q

V3

A

5th ICS between V2 and V4

27
Q

V4

A

5th ICS, MCL

28
Q

V5

A

5th ICS, AAl

29
Q

V6

A

5th ICS, MAL

30
Q

What are the augmented leads?

A

aVL, aVF, aVR

31
Q

aVL

A

left arm

32
Q

aVR

A

Right arm

33
Q

aVF

A

left leg

34
Q

Lead I

A

left arm

35
Q

Lead 2

A

Left Leg

36
Q

Lead II

A

Left leg

37
Q

The aVR should have a negative deflection of the R wave portion of the QRS complex?
TF

A

T

38
Q

Einthoven’s law is:

A

lead I + lead III = lead II

39
Q

Monitoring that is over a long period of time, sometimes days or weeks, is continuous monitoring. What are the two leads that are most commonly used?

A

lead II, MCL1

40
Q

negative QRS complex

A

an impulse traveling away from a positive electrod

41
Q

flat line

A

no electrical activity

42
Q

positive QRS complex

A

impulse travelling toward the positive electrode

43
Q

isoelectric

A

impulse traveling at a right angle to the positive electrode

44
Q

Normal chart speed for running a 12-lead EKG is ____ millimeters per second.

A

25

45
Q

A microshock is a

A

shock directly into the heart, is still dangerous, smaller shock

46
Q

There are how many types of artifact are there.

A

4

47
Q

To minimize artifact you should consider the following choices (choose all that apply)

A

Ask the patient to breath normally

Ask the patient to stop brushing their teeth

Change to a different lead

Change the electrode

48
Q

One of the most important things to do when you are not sure if the rhythm has artifact or if it is a dangerous rhythm would be to

A

evaluate the patient

49
Q

interference on the EKG tracing

A

artifact

50
Q

frequency response

A

filters out artifact

51
Q

controls height of EKG waves

A

gain

52
Q

There are just regular and irregular heart rhythms.
TF

A

F

53
Q

The 6-second method used to calculate the one minute heart rate is the most accurate method because it has all the information you may need.
TF

A

F

54
Q

The memory method works quickly to identify the heart rate on the rhythm strip.
TF

A

True

55
Q

The little blocks method should not be used to calculate the heart rate in irregular rhythms.
TF

A

F

56
Q

You are required to use a calculator to determine the heart rate on every rhythm strip.
TF

A

F

57
Q

Regularity of a rhythm is determined by measuring the

A

R-R intervals

58
Q

A regular rhythm is one in which the R-R intervals

A

vary by only one or two little blocks.

59
Q

An irregular rhythm is one in which

A

the R-R intervals vary “all over the place.”

60
Q

Atrial rate can be calculated by counting

A

P waves

61
Q

Chapter 6

A

EKG Interpretation (1 decks)

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