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Vascular > A Typical Vascular Disorders > Flashcards

A Typical Vascular Disorders Flashcards

1
Q

This vessel is usually higher pitched.

A

ICA

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2
Q

This vessel is the most pulsatile

A

ECA

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3
Q

The vessel has the most increased flow during diastole

A

ICA

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4
Q

Helical flow is seen in the…

A

Bulb

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5
Q

Based on this vessel’s waveform morphology, it is more similar to peripheral vessels

A

ECA

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6
Q

The temporal tap causes oscillations in the …..

A

ECA

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7
Q

A narrow band of frequencies would be considered….

A

laminar flow

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8
Q

Hissing or squealing sounds in a cerebrovascular vessel would be indicative of..

A

Stenosis

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9
Q

Within a severe ICA stenosis, what do we expect to happen to the PSV and EDV?

A

Both increase substantially

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10
Q

The horizontal axis is….

A

Time

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11
Q

The brightness of the pixels corresponds with what on spectral display?

A

Amplitude

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12
Q

The sample volume used in PW Doppler is usually ..

A

kept as small as possible

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13
Q

The carotid bulb is most often located…

A

at the proximal internal carotid artery

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14
Q

A collateralized ECA (one that in feeding the brain via ICA-ECA connections) is the result of…

A

ipsilateral ICA occlusion

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15
Q

VA stenosis usually occur where?

A

Proximally

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16
Q

This view for imaging a stenosis is misleading when depended upon completely; and multiple approaches must be used in order to avoid recording inaccurate plaque formations.

transverse view

A

saggital, long view

17
Q

Fatty Streak Plaque

A

Homogenous ( same throughout)
Low level echoes

18
Q

Fibrous (Soft) Plaque

A

Homogenous
Low to medium echoes
Very dangerous

19
Q

Complex Plaque

A

Low, medium and high level ( Heterogenous) echoes
soft and dense areas

20
Q

Calcification

A

Very bright, highly reflective echoes
Acoustic shadows

21
Q

Thrombosis

A

Fresh: same echogenicity of flowing blood

22
Q

ICA

A
  1. higher pitched
  2. More Continuous than ECA
  3. Less Pulsatile
  4. Increased flow during diastole
23
Q

Bulb

A
  1. Normal heliac flow will be evident proximally
  2. Blood flows in a spiral motion
  3. Flow is not traveling parallel to the walls
24
Q

ECA

A
  1. Higher peripheral resistance
  2. More pulsatile than ICA
  3. More similar to peripheral vessels
25
Q

CCA

A

Flow characteristics of both ICA and ECA

26
Q

Distal to a stenosis what will your waveforms look like?

A

Dampened: decreased velocities
More rounded upstroke

27
Q

An absent signal means what?

A

Occlusion
Very tight stenosis
Trickle flow

28
Q

Globally elevated velocities can mean what?

A

Increased cardiac output

29
Q

Aortic Regurgitation

A

Has sustained reversal of flow during diastole

Vascular (3 decks)

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