Collateral circulation ... of acute stroke with anterior circulation ischemia, comprising 134 cases with unilateral proximal (M1 and/or M2) middle cerebral artery (MCA) occlusion and 235 without ...

the vertebral vessels filled from the carotid arteries. With total occlusion of 1 subclavian artery and partial obstruction of the contralateral vessel, the pressure gradient favors retrograde ...

In addition to the presence of collateral channels, the location of the occlusion ... tibial artery is often asymptomatic, as two other vessels -- the posterior tibial and peroneal arteries ...