Chapter 35: Extracranial Cerebrovascular Evaluation

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1

amaurosis fugax

transient partial or complete loss of vision in one eye

2

aphasia

inability to communicate by speech or writing

3

ataxia

impaired ability to coordinate movement, especially disturbances in gait

4

bruit

noise caused by tissue vibration produced by turbulence that causes flow disturbance

5

cerebrovascular accident (CVA)

abnormal condition of the brain characterized by occlusion by an embolus, thrombus, or cerebrovascular hemorrhage or vasospasm, resulting in ischemia of brain tissues normally perfused by the damaged vessels

6

collateral pathway

pathway that develops because of vessel obstruction; smaller side branches of the vessel provide alternative flow pathways

7

common carotid artery (CCA)

arises from the aortic arch on the left side and from the innominate artery on the right side; supplies blood to the head and neck

8

diplopia

double vision

9

dysarthria

difficulty with speech caused by impairment of the tongue or other muscles essential to speech

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dysphagia

inability or difficulty in swallowing

11

external carotid artery (ECA)

smaller of the two terminal branches of the common carotid artery

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hemianopsia

partial loss of the visual field

13

hemiparesis

unilateral partial or complete paralysis

14

internal carotid artery (ICA)

larger of the two terminal branches that arise from the common carotid artery to supply the anterior brain and meninges

15

reversible ischemic neurologic deficit (RIND)

cerebral infarct that lasts longer than 24 hours but less than 72 hours

16

syncope

loss of consciousness and postural tone; fainting

17

transient ischemic attack (TIA)

an episode of cerebrovascular insufficiency, usually associated with partial occlusion of a cerebral artery by an atherosclerotic plaque or an embolus

18

vertebral artery

branch of the subclavian artery that merges with others to form the basilar artery

19

vertigo

sensation of having objects move about the person or sensation of moving around in space