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apa 1 /sim S. Horvath > st segment monitoring > Flashcards

st segment monitoring Flashcards

1
Q

lateral wall MI seen in

A

1, avl, v5, v6

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2
Q

inferior wall MI seen in

A

2, 3, avf (supplied by RCA)

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3
Q

anterior seen in

A

v3 v4 (LAD)

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4
Q

septal wall

A

v1 v2 (LAD septal branches)

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5
Q

most useful lead to detect arrhythmias

A

lead 2

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6
Q

p wave atria

A

depolarization beings

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7
Q

PR atria

A

depolarization complete

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8
Q

QRS atria

A

repolarization

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9
Q

QRS ventricle

A

depolarization beings

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10
Q

ST ventricle

A

depolarization complete

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11
Q

T ventricle

A

repolarization beings

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12
Q

after T wave ventricle

A

repolarization complete

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13
Q

ST segment MI if elevation or depression is greater than

A

1mm

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14
Q

the heart repolarizes from ___ to ___ and ___ to ___

A

apex to base and epi to endo

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15
Q

the myocytes fo from

A

+ to -

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16
Q

RCA shown on

A

2, 3, avf

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17
Q

circumflex shown on

A

1, avl, v5, v6

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18
Q

LAD shown on

A

v1 v2 v3 v4

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19
Q

the mean electrical vector tends to point toward ___ and away from ___

A

towards areas of hypertrophy, away from areas of MI

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20
Q

right axis deviation

A

1 pointing down and aVF pointing up

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21
Q

left axis deviation

A

1 pointing up and AVf pointing ddown

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22
Q

normal axis is between

A

-30 and 90

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23
Q

left axis dev is more neg than

A

-30

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24
Q

right axis dev is more pos than

A

90

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25
what causes right axis dev
COPD , bronchospasm, cor pulmonale, pulm hin, PE
26
what causes left axis dec
chronic htn, LBBB, aortic stenosis, aortic insufficiency, mitral regurg
27
Einthoven's law
if electrocardiograms are taken simultaneously with the three limb leads, at any given instant the potential in lead II is equal to the sum of the potentials in leads I and III.
28
rca supplies
RA and RV
29
L circumflex supplies
LA and LV
30
LAD supplies
RV, LV, septum
31
posterior wall infarct
V1 V2depression, v7 v8 v9 elevation.
32
bipolar leads read from
negative to positive
33
which leads are the bipolar leads
1, 2,3 (limb leads) neg to pos
34
which leads are the augmented leads
avr avl avf
35
augmented leads read from
center to specific positive lead and are unipolar
36
precordial leads (v1-v6) are
unipolar (from center to positive outward)
37
which lead for monitoring of ST in order
v3 v4 v5 2 avf
38
which lead is good for assessment of narrow QRS complex rhythms and p wave
lead 2
39
nagelhout recommends for 5 cable system
v3 mcl5 avf
40
nagelhout recommends for 3 lead system
mcl5 avf
41
where is LA placed
manubrium
42
where is V placed
lower body of sternum
43
where is LL placed
left midaxillary
44
RA placed
right midaxilary
45
RL
any convenient location
46
right arm
negative negative
47
left arm
positive negative
48
LL
postitive positive
49
12 lead RA
over the outer R clavicle
50
12 lead LA
over the outer L clavicle
51
12 lead LL
near the iliac crest or midway between the costal margin and left iliac crest, anterior axilally line
52
12 lead RL
at any conveienent location, upper right shoulder
53
12 lead v1
fourth intercostal space right of sternal border
54
12 lead v2
fourth intercostal space left of sternal border
55
12 lead v3
equal distance between v2 v4
56
12 lead v4
midclavicular line at fifth intercostal space
57
12 lead v5
horizontal to v4 on the anterior axillary line, or midway between v4 v6
58
12 lead v6
horizontal to v5 on midaxillary line
59
12 lead v7
horizontal to v6 on posterior axillary lie
60
12 lead v8
horizontal to v7 below the left scapula
61
12 lead v9
horizontal to v8 at the left paravertebral border
62
isoelectric line
PR segment
63
st threshold in leads v2 and v3
-.5mm
64
a depressed ST segment has greater __ than an upscoping depressed ST segment
specificity
65
lead 1 Is formed by
left arm + , right arm -
66
lead 2 is formed by
right arm - to left leg +
67
lead 3 is formed by
left arm+ , left leg +

apa 1 /sim S. Horvath (17 decks)

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