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CC > Dysrhythmias > Flashcards

Dysrhythmias Flashcards

1
Q

what does the pr interval tell you

A

how long it take to get from SA node to AV node

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2
Q

why do we read EKG every hours

A

baseline - trends

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3
Q

normal HR

A

60-100

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4
Q

what is the risk with AFib

A

clots

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5
Q

what does automaticity mean

A

don’t need a stimulant to beat - just goes

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6
Q

what does contractility mean

A

ability of heart to contract

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7
Q

what does excitability mean

A

ability of cells to respond to an electrical impulse

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8
Q

what does conductivity mean

A

signals heart muscle to contract

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9
Q

heart beat pathway

A

SA node signals atria to contract; signal stops at AV node

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10
Q

Pacemaker of the heart

A

SA node

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11
Q

which ventricle is bigger

A

left - blood is pushed through the whole body

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12
Q

the only artery that carries de-oxygenated blood

A

pulmonary artery carries blood to lungs to be oxygenated

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13
Q

the p-wave represents

A

atrial contraction

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14
Q

the p-r interval represents

A

pause at the AV node

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15
Q

the q-r-s represents

A

ventricular contractions

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16
Q

the st wave represents

A

ventricular re-polarization

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17
Q

the pr interval should measure (norm)

A
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18
Q

the qrs interval should measure (norm)

A

.08 -

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19
Q

the qt interval should measure (norm)

A

.40

20
Q

a small EKG box measures

A

.04 sec

21
Q

a lg EKG box measures

A

.20 sec

22
Q

absolute refractory period

A

no outside source can stimulate ventricles to beat again

23
Q

relative refractory period

A

could stimulate ventricles to beat again - causing funky rhythms - measure qt interval

24
Q

if pt is having an acute MI

A

fireman’s hat - ST segment is elevated

25
Q

what does digoxin do to the heart rate

A

listen to apical pulse for full min before administering

slows HR

26
Q

sinus bradycardia means hr is less than

A

60 - everything else in normal

27
Q

sinus tachycardia means hr is greater than

A

100 but less than 150 - everything else in normal

28
Q

what is the cause of bradycardia

A

athletes - very well trained

pt. on beta blocker

29
Q

what type of shock will you see a HR of 50

A

neurogenic shock

30
Q

what is a pathological q wave

A

pt had a previous MI

q wave is bigger than norm - at least half the size of qrs

31
Q

what do we do for pt with sinus tachy

A

treat the cause

32
Q

why would a pt have tachy

A

fight or flight - sympathetic nervous system

dehydration, fever

33
Q

PSVT (paroxysmal supra-ventricular tachy) manifestations

A

HR 150-250 - beat is above the ventricle

QRS is narrow

34
Q

trt for PSVT

A

adenosine

35
Q

how is adenosine given

A

hard and fast - 6,12,12 - must get to heart in 30 sec.

pt becomes a systolic for 6 sec

36
Q

a flutter manifestations

A

saw tooth wave form - SA Node is not the stimulus

r-r can be normal or abnormal

37
Q

how do i know if i am perfusing

A

qrs

38
Q

a fib manifestations

A

quivering - decreasing push from atria to ventricles

39
Q

what do we worry about with a fib

A

blood clots - blood pools in atria causing clots

40
Q

first degree av block manifestations

A

pr interval is prolonged (over .20)

41
Q

second degree av block (wenckebach) manifestations

A

pr gets continuously longer, than drop a full qrs

42
Q

third degree av block manifestations

A

p wave and qrs’s run to their own beat

emergency! need pacemaker

43
Q

leading cause of PVC

A

potassium is getting low

check electrolytes

44
Q

torsades de pointes is a good indicator of

A

low magnesium levels - long QT - irregular v-tach

45
Q

mgmt for v fib

A

shock to stimulate the SA Node and start CPR

CC (4 decks)

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