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
CCA
Flow characteristics of both ICA and ECA
26
Distal to a stenosis what will your waveforms look like?
Dampened: decreased velocities More rounded upstroke
27
An absent signal means what?
Occlusion Very tight stenosis Trickle flow
28
Globally elevated velocities can mean what?
Increased cardiac output
29
Aortic Regurgitation
Has sustained reversal of flow during diastole
30