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PVI > Carotids > Flashcards

Carotids Flashcards

1
Q

ICA/CCA ratio > 4

A

70% diameter reduction

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2
Q

1st branch of ICA

A

ophthalmic artery

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3
Q

1st branch of ECA

A

thyrocervical

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4
Q

NAVIX 80-99% ICA stenosis

A

>= 400 cm/sec PSV

>= 125 cm/sec EDV

ratio >= 5.5

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5
Q

NAVIX 70-79% ICA stenosis

A

>= 325 cm/sec PSV

>=100 cm/sec EDV

ratio >= 4.0

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6
Q

NAVIX 50-69%

A

>= 180 cm/sec PSV

>= 80 cm/sec EDV

ratio >= 1.8

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7
Q

NAVIX 20-49%

A

> 90 cm/sec PSV

< 80 cm/sec EDV

ratio < 1.8

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8
Q

SRU 50-69%

A

125-230 cm/sec PSV

40-100 cm/s EDV

ratio 2-4

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9
Q

SRU > 70%

A

> 230 cm/s PSV

>= 40 cm/s EDV

ratio > 4

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10
Q

delayed upstroke

A

distal

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11
Q

finding in brachiocephalic stenosis/occlusion

A

wandering CCA - to and fro flow -

unable to obtain velocity

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12
Q

doubling CCA PSV

A

>= 50%

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13
Q

ECA stenosis criteria

A

> 200 cm/sec with post stenotic turbulence

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14
Q

abnormal subclavian

A

200 cm/sec with post stenotic turbulence

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15
Q

carotid steal

A

brachiocephalic artery stenosis/occlusion -

pressure drop in systole -

reversal or delay in systolic flow -

siphoning back & forth

(CCA parvus tardus)

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16
Q

carotid stent restenosis

A

6% at 1-2 years (update stats)

17
Q

carotid stent > 75%

A

> 300 cm/s PSV; >125 cm/s

18
Q

fibrous plaque

A

echogenic

19
Q

fatty plaque

A

lucent

20
Q

anterior hemispheric infarct

A

unilateral amaurosis fugax motor/sensory deficit homonomous hemianopsia aphasia

21
Q

posterior hemispheric infarct

A

bilateral

diplopia

ataxia

vertigo

drop attacks

confusion/memory loss

dyphagia

dysarthria

22
Q

mid to distal ICA involvement

A

FMD

23
Q

high resistance CCA waveform

A

stenosis in ICA or in MCA/Circle of Willis

24
Q

bunny ears - early systolic reversal

A

early subclavian steal retrograde vertebral flow ipsilateral subclavian w stenosis proximal to vert

25
Q

turbulence distal to CEA

A

turbulence distal to CEA

26
Q

brain death

A

flow reversal, decreased diastolic flow, to and fro flow,

27
Q

vertebrobasilar symptoms

A

dizziness

syncope

neurological symptoms bilateral extremities

ocular symptoms

28
Q

A

bunny rabbit

presteal flow - prior to becoming retrograde

29
Q

ONLY side of carotid steal

A

RIGHT

30
Q

is there a LEFT carotid steal

A

No

only right

31
Q

incidence of carotid stent stenosis

A

6% at 1-2 years

mostly stenosis in first 6 months - 46%

6-12 months - 25%

12 months - 29%

PVI (9 decks)

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