BY-PASSING VERTEBRAL ARTERY OCCLUSION BY EXTRACRANIAL ANASTOMOTIC CHANNELS.
D000792:Angiography; D001157:Arterial Occlusive Diseases; D003097:Collateral Circulation; D006801:Humans; D009333:Neck; D014652:Vascular Diseases; D014711:Vertebral Artery
ANGIOGRAPHY; COLLATERAL CIRCULATION; NECK; VASCULAR DISEASES; VERTEBRAL ARTERY