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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
Q

what causes right axis dev

A

COPD , bronchospasm, cor pulmonale, pulm hin, PE

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26
Q

what causes left axis dec

A

chronic htn, LBBB, aortic stenosis, aortic insufficiency, mitral regurg

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27
Q

Einthoven’s law

A

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
Q

rca supplies

A

RA and RV

29
Q

L circumflex supplies

A

LA and LV

30
Q

LAD supplies

A

RV, LV, septum

31
Q

posterior wall infarct

A

V1 V2depression, v7 v8 v9 elevation.

32
Q

bipolar leads read from

A

negative to positive

33
Q

which leads are the bipolar leads

A

1, 2,3 (limb leads) neg to pos

34
Q

which leads are the augmented leads

A

avr avl avf

35
Q

augmented leads read from

A

center to specific positive lead and are unipolar

36
Q

precordial leads (v1-v6) are

A

unipolar (from center to positive outward)

37
Q

which lead for monitoring of ST in order

A

v3 v4 v5 2 avf

38
Q

which lead is good for assessment of narrow QRS complex rhythms and p wave

A

lead 2

39
Q

nagelhout recommends for 5 cable system

A

v3 mcl5 avf

40
Q

nagelhout recommends for 3 lead system

A

mcl5 avf

41
Q

where is LA placed

A

manubrium

42
Q

where is V placed

A

lower body of sternum

43
Q

where is LL placed

A

left midaxillary

44
Q

RA placed

A

right midaxilary

45
Q

RL

A

any convenient location

46
Q

right arm

A

negative negative

47
Q

left arm

A

positive negative

48
Q

LL

A

postitive positive

49
Q

12 lead RA

A

over the outer R clavicle

50
Q

12 lead LA

A

over the outer L clavicle

51
Q

12 lead LL

A

near the iliac crest or midway between the costal margin and left iliac crest, anterior axilally line

52
Q

12 lead RL

A

at any conveienent location, upper right shoulder

53
Q

12 lead v1

A

fourth intercostal space right of sternal border

54
Q

12 lead v2

A

fourth intercostal space left of sternal border

55
Q

12 lead v3

A

equal distance between v2 v4

56
Q

12 lead v4

A

midclavicular line at fifth intercostal space

57
Q

12 lead v5

A

horizontal to v4 on the anterior axillary line, or midway between v4 v6

58
Q

12 lead v6

A

horizontal to v5 on midaxillary line

59
Q

12 lead v7

A

horizontal to v6 on posterior axillary lie

60
Q

12 lead v8

A

horizontal to v7 below the left scapula

61
Q

12 lead v9

A

horizontal to v8 at the left paravertebral border

62
Q

isoelectric line

A

PR segment

63
Q

st threshold in leads v2 and v3

A

-.5mm

64
Q

a depressed ST segment has greater __ than an upscoping depressed ST segment

A

specificity

65
Q

lead 1 Is formed by

A

left arm + , right arm -

66
Q

lead 2 is formed by

A

right arm - to left leg +

67
Q

lead 3 is formed by

A

left arm+ , left leg +

apa 1 /sim S. Horvath (17 decks)

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