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Gravity
Terms in this set (19)
antegrade
Crossover collateralization occurs when there is ---- flow demonstrated in the ipsilateral ACA.
retrograde
ECA to ICA collateralization flow is evident when there is ----- flow in the ipsilateral ophthalmic artery,
posterior, anterior
----- to ---- collateralization is evident when flow velocities in the ipsilateral PCA exceed those of the ipsilateral MCA.
MCA, ICA
Diagnosis of occlusion is difficult and is most accurate with ---- or -----.
MCA
Diagnosis of vasospasm is most accurate with ----. Important with endarterectomy.
MCA, ACA, PCA
Which vessels are seen transtemporal?
ophthalmic, ICA siphon
Which vessels are seen transorbital?
vertebral, basilar
Which vessels are seen transoccipital?
30-60
What is the depth of the MCA?
60-80
What is the depth of the ACA?
60-70
What is the depth of the PCA?
60-80
What is the depth of the ophthalmic?
60-90
What is the depth of the vertebral?
80-120
What is the depth of the basilar?
55
What is the velocity of the MCA?
50
What is the velocity of the ACA?
40
What is the velocity of the PCA?
38
What is the velocity of the vertebral?
41
What is the velocity of the basilar?
;