Chapter 20: Misc Cerebrovascular Flashcards
subclavian occlusion / subclavian steel results in
retrograde flow in ipsilateral vertebral artery
subclavian stenosis results in
alternating flow
patients with subclavian occlusion are usually
asymptomatic
claudication is rare
temporal arteritis
inflammation of arterial wall of the temporal artery
how does temporal arteritis appear
inflamed arterial segments larger in diameter with homogenous thickening or anechoic halo from edema of intima
temporal arteritis doppler
intimal thickening may result in significant stenosis where PSVs are doubled
calculating diameter reduction
1- d/D x 100
MR angiography
may overestimate disease
CT for cerebrovascular
most frequent
eval infactions, aneurysms, hermorrhage, avms
stenosis treatment
endarterectomy or stent
occlusion treatment
usually no treatment
