Fig. 2From: Four collateral circulation pathways were observed after common carotid artery occlusionDSA discovered a collateral circulation pathway that supplied ipsilateral ICA after CCAO. This was a right (ipsilateral) subclavian artery angiography (lateral position, arterial phase). Right CCA was occluded. The collateral circulation pathway was: right vertebral artery (arrow①) – right occipital artery (arrow②) – right ECA (retrograde, arrow③) – right ICA (arrow④)Back to article page