Multimodality Imaging Assessment of Ocular Ischemic Syndrome

Table 3

Comparison of CTA and CDI results between OIS and Control.

	OIS	Control	value
Number of eyes (n)	30	30
CTA results	25 (83.33%)	3 (10.10%)
Ipsilateral ICAO, n (%)	25 (83.33%)	3 (10.10%)
Ipsilateral ICAS (mean ± SD)	88.31 ± 8.25	77.38 ± 8.06
CoW stenosis, n (%)
ACA	9 (30.00%)	11 (36.67%)
PCA	11 (36.67%)	4 (13.33%)
MCA	19 (63.33%)	7 (23.33%)
Collateral patency, n (%)
ACoA	16 (53.33%)	17 (56.67%)
PCoA	21 (70.00%)	10 (33.33%)
CDI results
OA flow direction, n (%)
Antegrade	7 (23.33%)	26 (86.67%)
Retrograde	23 (76.67%)	4 (13.33%)
PSV (m/sec)
CRA	7.87 ± 1.83	9.69 ± 2.32
PCA	9.42 ± 2.31	11.39 ± 2.93

ICAO: internal carotid artery occlusion; ICAS: internal carotid artery stenosis; CoW: the circle of Willis; ACA: anterior cerebral arteries; PCA: posterior cerebral artery; MCA: middle cerebral artery; ACoA: anterior communicating artery; PCoA: posterior communicating arteries; OA: ophthalmic artery; CRA: central retinal artery; PCA: posterior ciliary artery; PSV: peak systolic velocity. values were calculated using the independent t-test. values were calculated using the Mann–Whitney U test. ^‡Fisher’s exact test of chi-square tests.