The potential risk factors of cortical visual impairment following cerebral angiography: a retrospective study

Figures & data

Figure 1 Imaging of skull and vascularity. No abnormalities of occipital lobe were identified on (A) MRI, T2, (B) MRI, T1, and (C) CT. (D) Mild vertebral stenosis was shown on the computed tomographic angiography (arrow). (E) Visual evoked potential examination demonstrated a prolonged P100.

Table 1 The univariate analysis of risk factors for cortical visual impairment (n [%])

Factors		Total (n=4528)	Cortical visual impairment (n=11)	p
Gender	Male	2,602	6 (0.23)	0.726
	Female	1,926	5 (0.26)
Age		51.08±11.84	58.34±12.36	0.205
Weight (kg)		66.28±11.71	58.45±10.36	0.098
Diabetes	Yes No	1,592 2,936	5 6	0.203
Hypertension	Yes	1,487	4	0.952
	No	3,041	7
Hyperlipidemia	Yes	1,696	4	1.230
	No	2,832	7
Contrast medium (ml)		86±20	120±25	<0.001
Operation time (min)		59±15	72±20	0.191

Table 2 The clinical presentation of visual impairment

Clinical symptoms	Cases	Percentage (%)
Blurred vision	7	63.63
Binocular blindness	4	36.37
Total	11	100.00

Table 3 The multivariate logistic regression analysis for cortical visual impairment

Variables	p	OR (95% CI)
Weight (kg)	0.093	0.709 (0.483–1.013)
Operation time (min)	0.175	1.126 (0.973–1.322)
Contrast medium (ml)	<0.001	1.133 (1.101–1.175)

Abbreviations: OR, odds ratio; CI, confidence interval.