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Med Lab > ECG > Flashcards

ECG Flashcards

1
Q

what does P wave confirm?

A

SA node (atria) health

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2
Q

what is job of bundle of His

A

send message to Purkinji fibers

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3
Q

what happens during QRS complex

A

ventricular depolarization and atrial repolarization (hidden)

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4
Q

proper term for Resting

A

polarization

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5
Q

v3 produces what deflection

A

more positive than v1 and v2

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6
Q

what does ECG do to augmented lead readings

A

amplifies reading by 50%

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7
Q

v2 produces what deflection

A

negative

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8
Q

tachycardia means what

A

more than 100bpm

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9
Q

ion movement during depolarization

A

sodium moving IN

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10
Q

where is v1 placed

A

4th intercostal R of sternum

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11
Q

what does less than 60bpm mean

A

bradycardia

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12
Q

what happens during T-P interval?

A

relaxation and resting

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13
Q

2 possible reasons for wandering baseline

A
  • loose electrodes

- patient moved

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14
Q

where are augmented leads attached

A

limbs

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15
Q

bradycardia means

A

less than 60bpm

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16
Q

what are the 3 sets of leads on ECG called

A
  • standard leads
  • augmented leads
  • precordial leads
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17
Q

what are standard leads designated

A

I, II, III (roman numerals 1, 2, 3)

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18
Q

2 other words for relaxation

A
  • diastole

- repolarization

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19
Q

v4 produces what deflection

A

more positive than v1 and v2

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20
Q

where is v2 placed

A

4th intercostal L of sternum

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21
Q

ion movement during polarization

A

NO ion movement

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22
Q

relaxation - proper name

A

repolarization

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23
Q

where is v3 placed

A

between v2 and v4

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24
Q

v1 produces what deflection

A

negative

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25
v5 produces what deflection
positive
26
what does Einthoven's Law mean
deflection of lead I + III = II
27
where is v6 placed
5th intercostal mid axilla
28
how long does a heart beat last
0.8seconds
29
what action occurs when heart is polarizing
resting
30
augmented leads are designated as
aVR aVL aVF
31
where are standard leads applied on the body
patient's limbs (arms and legs)
32
what does more than 100bpm mean
tachycardia
33
what is the Pathway of Conduction
SA Node > AV Node > Bundle of His > Purkinji Fibers
34
to confirm standard leads are connected properly, consider what?
Einthoven's Law
35
what are precordial leads designated
v1 to v6
36
where are precordial leads attached
to the chest
37
aVF produces what defection
positive deflection
38
what action occurs when a portion of the heart is repolarizing
relaxation
39
which wave indicates SA node health
P wave
40
what standard lead is the ground
right leg
41
ion movement during depolarization
sodium (Na) ion moves IN
42
which tracing are produced through same leads
- standard leads | - augmented leads
43
what does QRS complex confirm
AV node (ventricle) health
44
if patient is missing a foot, where is electrode placed
anterior of thigh above knee
45
ion movement during repolarization
potassium moving OUT
46
precordial leads are what? why?
unipolar, always maintain same polarity
47
3 possible reasons for a somatic tremor
- shivering - anxiety - Parkinsons
48
where is v4 placed
5th intercostal midclavicular
49
if patient is missing a leg, where is electrode placed
abdomen, either side of umbilicus
50
which wave indicates AV node health
QRS
51
why do augmented leads need to be amplified
atria walls thinner, they have less cardiac cells and have less ion movement
52
how long does the heart relax during heart beat
0.4 seconds
53
4 possible reasons for AC interference
- cell phone in pocket - bed touching wall - buzzing lights - electrical equipment
54
aVL produce what deflection
either negative or positive deflection
55
why is ECG called 12 lead, when there are only 10
- lead on right leg is ground and doesn't count | - standard and augmented leads are read through same leads (each counts as 2)
56
AV node/QRS complex determine health of what
ventricles
57
bpm with normal heart rate
72bpm
58
2 other words for contraction
- systole | - depolarization
59
standard leads are what? why?
- bipolar | - left arm changes polarity
60
augmented leads are what? why?
- unipolar | - always maintain same polarity
61
aVR produce what deflection
negative deflection
62
what happens during P wave
atria in depolarization
63
SA node / P wave determine health of what
atria
64
contraction - proper term
depolarization
65
ion movement during polarization
no movement
66
how long does the heart contract during a heart beat
0.4 seconds
67
what happens at the end of T wave
ventricles rest
68
what speed does an average ECG record at
25mm per second
69
how long does P wave last
0.1-0.12 seconds
70
the heart acts as a negative pole for which leads
- augmented leads | - precordial leads
71
how long does QRS complex last
0.1-0.12 seconds
72
what leads are read on the frontal plane
standard and augmented leads
73
what action occurs when a portion of the heart is depolarizing
contracting
74
what is a somatic tremor
small muscle movement
75
how long does T wave last
0.12-0.2 seconds
76
how does a wandering baseline show on ECG
large deflection way from baseline
77
where is v5 placed
5th intercostal anterior axilla
78
how does a somatic tremor show on ECG
small irregular inflections
79
what do augmented leads record
atrial contraction
80
what happens at the beginning of T wave
atria rests
81
what do Purkinji fibers do
exude most force causing ventricles to contract
82
how does AC interference show on ECG
multiple small regular inflections
83
what happens during T wave
ventricular reppolarization
84
ion movement during repolarization
potassium (k) ion moves OUT

Med Lab (13 decks)

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