Week 3- Extracranial Cerebrovascular Evaluation

Question 1

ascending AO originates from ___ of heart

Answer 1

LV

Question 2

3 main arteries that arise from the aortic arch

Answer 2

• brachiocephalic
• left common carotid
• left subclavian

Question 3

CCA lies medial to ___

Answer 3

jugular vein

Question 4

left CCA is usually ___ than the right CCA

Answer 4

longer

Question 5

__, ___, and ___ are enclosed i connective tissue called the carotid sheath

Answer 5

carotid artery, vagus nerve, jugular vein

Question 6

best way to differentiate the ECA and ICA

Answer 6

ECA has branches

Question 7

CCA usually bifurcates at ___ border of thyroid cartilage.

Answer 7

superior

Question 8

ECA usually lies ___ to ICA, as it ascends courses postrolaterally

Answer 8

anteriomedial

Question 9

t/f: ECA is larger than the ICA

Answer 9

false

Question 10

t/f: the ECA does not usually supply the brain

Answer 10

true

Question 11

4 segments of the ICA

Answer 11

1. cervical
2. petrous
3. cavernous
4. cerebral

Question 12

___ portion of ICA begins at the CCA bif and extends to base of skull

Answer 12

cervical

Question 13

vert artery is a branch of

Answer 13

subclavian artery

Question 14

coiling of the ICA may give __ flow patterns and ___ velocities

Answer 14

turbulent

increased

Question 15

first branch of the ICA

Answer 15

ophthalmic artery

Question 16

ophthalmic artery is important in ____

Answer 16

collateral pathways

Question 17

name the 8 branches of the ECA in ascending order

Answer 17

• superior thyroid
• ascending pharyngeal
• lingual
• facial
• occipital
• posterior auricular
• terminal branches
• superficial temporal
• internal maxillary

Question 18

most commonly visualized branch of ECA during carotid duplex imaging

Answer 18

Superior thyroid artery

Question 19

vertebral arteries are large branches of the ___ artery

Answer 19

subclavian

Question 20

__ vert artery is the dominant artery

Answer 20

left

Question 21

2 branches of ___ combine to form the basilar artery

Answer 21

vert artery

Question 22

vert arteries can supply flow to the MCA via

Answer 22

posterior communicating arteries

Question 23

in 75% of the pop, parts of the circle of willis are ___

Answer 23

hypoplastic / absent

Question 24

collateral pathways in ICA occlusion

Answer 24

ECA –> Facial artery –> Ophthalmic artery –> Carotid siphon –> ICA

Question 25

collateral pathway in CCA occlusion

Answer 25

thyroid --> ECA --> backflow to ICA

Question 26

proximal SCA/ brachipcephalic occlusion

Answer 26

subclavian "steal" results

Question 27

describe what occurs in SUBCLAVIAN STEAL

Answer 27

blood from brain is used to supply the arm

Question 28

what will you see with a subclavian steal

Answer 28

retrograde flow in the ipsilateral (same side) vert to supply the distal SCA

Question 29

which of the following does not influence hemodynamics: - vessel diameter - flow volume - vessel tortuosity - blood viscosity - resistance - profusion - blood pressure

Answer 29

blood pressure

Question 30

what does the ECA supply

Answer 30

neck, face, scalp

Question 31

capillary beds ECA supplies have __ resistance

Answer 31

higher

Question 32

blood flow within ECA is ___ resistance

Answer 32

high

Question 33

2 common collateral pathways

Answer 33

- ophthalmic artery | - circle of willis

Question 34

CCA spectral waveform demonstrates resistace pattern that is combo of __ resistance ICA and ___ resistance ECA

Answer 34

low | high

Question 35

CCA doppler will have ___ colour throughout cardiac cycle

Answer 35

continuous