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Su: Sim Lab 2 > 37. Electrophys > Flashcards

37. Electrophys Flashcards

1
Q

intraop 5 lead

A

II
V5

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2
Q

intraop 5 lead covers

A

80% of ischemic changes

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3
Q

lead II

A

MEA
RV
inf LV

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4
Q

V5

A

lateral LV

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5
Q

polarized state is mx by

A

Na+/K+ atpase

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6
Q

what propagates AP through myocardium

A

Na+/Ca2+ channels

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7
Q

what is involved with excitiation/contraction coupling

A

Ca2+

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8
Q

what is involved with myosin power stroke

A

Ca2+

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9
Q

right heard leads

A

V1
V2

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10
Q

interventricular septum leads

A

V3
V4

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11
Q

left heart leads

A

V5
V6

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12
Q

inotropy

A

speed and strength of cardiac contraction

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13
Q

lusitropy

A

relaxation and ventricular filling

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14
Q

issue with inotropy causes

A

systolic heart failure

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15
Q

issue with lusitropy causes

A

diastolic heart failure

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16
Q

1st degree AV block: cause

A

athlete
digoxin
B blocker
CCB
ischemia
MD

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17
Q

1st degree AV block: avoid

A

vagal stimulation
electrolyte abnormalities
ischemia

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18
Q
A

1st degree AV block

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19
Q
A

2nd degree AV block type 1

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20
Q
A

2nd degree AV block type 2

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21
Q
A

3rd degree AV block

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22
Q

adams-stoke attack

A

sudden fainting spells due to drop in CO
(3rd degree block)

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23
Q

RBBB ecg

A

wide QRS > 120 ms in leads 1/2
deep S in leads 1/V6

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24
Q
A

RBBB

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25
Q

Left BBB Ecg

A

wide QRS > 120 ms
no Q wave in 1, V5, V6
broad/notched R wave in 1, aVL, V5, V6

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26
Q

LBBB indicates

A

ischemic serious heart disease

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27
Q

lab for ischemia

A

troponin C

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28
Q
A

LBBB

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29
Q

tachydysrhythmia with narrow QRS

A

ABOVE BOH:
sinus tach
a fib
a flutter
junctional tach
paroxysmal atrial tach
accessory pathway rachycardia

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30
Q

wide complex tachycardia

A

BELOW BOH:
V TACH
SVT w/intraventricular defect
SVT w/aberrant conduction
SVT w/preexcitation pathway

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31
Q

arrythmia initiation mechanism

A
  1. incr automaticity
  2. reentry through abnormal pathway
  3. trigger of potential after depolarization
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32
Q

what can induce automaticity

A

any myocyte

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33
Q

what sets the normal value

A

the inerrant baseline automaticity

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34
Q

what decreases timeframe for depolarization

A

phase 4 shift

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35
Q
A

sinus tachycardia

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36
Q
A

PAC

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37
Q
A

paroxysmal SVT

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38
Q

orthodromic

A

more common
narrow QRS
no delta

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39
Q

antidromic

A

less common
wide QRS
delta wave

40
Q

orthodromic AVRT conduction

A

antegrade conduction through AV node

41
Q

antidromic AVRT conduction

A

retrograde conduction through AV node

42
Q
A

WPW antidromic

43
Q
A

WPW orthodromic

44
Q
A

afib

45
Q
A

afib w/RVR

46
Q

afib w/RVR criteria

A
  1. afib rhythm
  2. HR > 100bpm
47
Q
A

aflutter

48
Q
A

PVC bigeminy

49
Q
A

PVC trigeminy

50
Q
A

Nonsustained ventricular tachycardia
(grouping of PVCs)

51
Q

R on T phenomenon

A

PVC that occurs during middle 3rd of relative refractory period of T wave

52
Q

long QT males

A

QT> 440ms

53
Q

long QT females

A

QT>460 ms

54
Q

most common inherited form of long QT

A

romano-ward syndrome

55
Q

increased risk of polymorphic VTACH

A

QT>500ms

56
Q

treat prolonged QT

A

mg
K
discontinue QT prolongation drugs
pacing (if neede)

57
Q

which is worse: SVT or NSVT

A

NSVT

58
Q
A

monomorphic VTACH

59
Q
A

polymorphic VTACH

60
Q
A

Vfib

61
Q
A

sinus brady

62
Q

junctional pacing comes from

A

AV node

63
Q

junction HR

A

40-60 bpm

64
Q
A

junctional bradycardia

65
Q
A

junctional tachycardia

66
Q

adenosine indication

A

AVNRT
AVRT

67
Q

adenosine CI

A

SSS
3rd degree AV block without pacer

68
Q

adenosine antagonist

A

caffeine
theophylline

69
Q

adenosine dosing

A

6mg
12mg
12mg

70
Q

atropine indication

A

symptomatic bradycardia

71
Q

atropine dose

A

0.5mg IV

72
Q

amiodarone mechanism

A

K+ channel antagonist

73
Q

amiodarone dosing

A

PVT/Vfib: 300 mg initial/150 redose
others: 150 mg

74
Q

beta blocker mechanism

A

antagonize beta receptors
slow AVN conduction

75
Q

beta blocker CI

A

2nd degree heart block
3rd degree heart block
severe CHF
RAD
WPW

76
Q

CCB indication

A

narrow complex QRS tachycardia
afib/aflutter
SVT

77
Q

CCB CI

A

WPW
beta blockers (causes heart block)

78
Q

CCB dosing

A

verapamil: 2.5-5mg IV (0.15 mg/kg)
diltiazem: 0.25 mg/kg IV

79
Q

digoxin mechanism

A

Na/K ATP antagonist

80
Q

digoxin dosing

A

400-600 mg total

81
Q

dopamine indication

A

2nd line treatment for symptomatic brady

82
Q

dopamine dosing: incr blood flow

A

3-5mcg/kg/min

83
Q

dopamine dosing: b agonist

A

5-7mcg/kg/min

84
Q

dopamine dosing: a agonist

A

> 10mcg/kg/min

85
Q

epi mechanism

A

adrenergic agonist

86
Q

when will you need higher doses of epi

A

if pt is on beta blocker or CCB

87
Q

isoproterenol mechanism

A

B1 and B2 agnoist

88
Q

isoproterenol dose

A

2-10mcg/min

89
Q

lidocaine mechanism

A

Na+ channel antagnoist

90
Q

lidocaine dosing

A

1-1.5 mg/kg (up to 3 mg/kg total)

91
Q

mg dosing: pulseless

A

1-2g over 5 mins

92
Q

mg dosing: pulse

A

1-2 g over longer period

93
Q

mg mechanism

A

cofactor that aids Na/K transport

94
Q

procainamide mechanism

A

Na+ channel antagonist

95
Q

procainamide dosing

A

50mcg/min

Su: Sim Lab 2 (18 decks)

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