From: Comparison between intracranial collaterals and cerebral hemodynamics in patients with extracranial carotid stenosis versus combined extra- and intracranial stenosis using transcranial duplex
Ophthalmic artery
MRA
Chi-square
Extracranial stenosis
Intracranial and extracranial stenosis
Total
N
%
χ 2
P value
Reverse
3
20.00
0
0.00
10.00
3.333
0.068
Forward
12
80.00
15
100.00
27
90.00
30