AVM - CTA/MRA/DSA
AVM - CTA/MRA/DSA
Search Pattern Assist ?Exam
Purpose
2. Identify the nidus character (AVM, AVM with AVF component)
3. Evaluate nidus size & location
4. Evaluate for flow related afferent aneurysms
5. Evaluate efferent egress: 1. pial, 2. deep medullary veins, 3. dural wall.
6. Identify meningeal/dural AV malformations
7. Identify thrombosed AVM's: partial or complete
8. Identify cerebral AV fistulae: 1. pial, 2. deep (vein of Galem malformations), traumatic AV fistulae
9. Identify non shunting vascular malformations: DVA, telangiectasias
Findings
Current vascular findings on CTA/MRA/DSA:
There is evidence of pial avm. [Yes/No]
There is evidence of deep parenchymal avm. [Yes/No]
There is evidence of choroidal avm. [Yes/No]
There is an AVM is present. Therefore assess: the afferent input; nidus detail, efferent output; internal AVF; steal effects; venous hypertension effects. [Yes/No]
There is evidence of angiomatous transformation (AVM without distinct nidus) [Yes/No]
There is evidence of thrombosed avm. [Yes/No]
There is evidence of proximal saccular, flow-related aneurysm(s) evident in afferent arteries to an AVM. [Yes/No]
There is evidence of AV malformation with a high-flow AV-fistulous component. [Yes/No]
There is a direct AV pial fistula (mostly in infants). [Yes/No]
There is evidence of Galenic AV malformation or intradural direct AV high flow fistula (predominantly infants & children). [Yes/No]
There is evidence of dural avm on CTA/MRA/DSA. [Yes/No]
There is evidence of dural avm with efferent drainage into pial veins. [Yes/No]
There is evidence of dural AVF or AVM with concurrent sinus thrombosis & rerouted venous egress. [Yes/No]
There is evidence of non-shunting, cavernous malformation(s). [Yes/No]
There is evidence of a DVA. [Yes/No]
There is evidence of pontine telangiectasia. [Yes/No]
CT perfusion is abnormal for any reason. [Yes/No]
