Balloon test occlusion of internal carotid artery: Angiographic findings predictive of results

Table 1 Results of anterior cerebral artery visualization by cross flow and the balloon test occlusion outcome

ACA visualization		BTO-positive (%)	BTO-negative (%)	Total (%)
Poor	Grade 0	2 (5)	0 (0)	2 (5)
	Grade 1	0 (0)	0 (0)	0 (0)
	Grade 2	1 (2)	1 (2)	2 (5)
Good	Grade 3	0 (0)	5 (12)	5 (12)
	Grade 4	2 (5)	31 (74)	33 (78)
Total		5 (12)	37 (88)	42 (100)

Significant differences (P = 0.0051; 95%CI: 0.13-7.61) was seen between the ACA visualization and the BTO outcome. ACA: Anterior cerebral artery; BTO: Balloon test occlusion.