Rotational vertebral artery occlusion (RVAO), sometimes known as "Bow hunter syndrome," is an important and diagnostically challenging cause of posterior circulation stroke in children. It is caused by impingement of osseous and/or ligamentous structures on the vertebral artery.
Department of Neurology, Cincinnati Children's Hospital Medical Center, ML 2015, 3333 Burnet Avenue, Cincinnati, OH 45229-3039, USA. hansel.greiner@cchmc.org