title: [Syncopes and transitory neurologic manifestations revealing cervico-occipital joint malformations. Evidence of a vascular mechanism].
abstract: Two cases of cervico-occipital malformation revealed by syncopes are reported. The first patient has an Arnold-Chiari type I malformation and the second has a basilar impression. The paroxysmal clinical manifestations are triggered by head-turning or exertion. In the second case Doppler vertebral artery recordings show circulatory arrest during a moderate turning motion of the head. A vascular mechanism may explain the occurrence of paroxysmal symptoms in cervico-occipital malformations.
mesh_terms: D000293:Adolescent; D001139:Arnold-Chiari Malformation / Q000175:diagnosis*; D001269:Atlanto-Occipital Joint / Q000002:abnormalities; D006801:Humans; D008297:Male; D008875:Middle Aged; D010985:Platybasia / Q000175:diagnosis*; D013575:Syncope / Q000175:diagnosis*; D014463:Ultrasonography; D014715:Vertebrobasilar Insufficiency / Q000175:diagnosis
vernacular_title: Syncopes et manifestations neurologiques transitoires révélatrices de malformations de la charniére cervico-occipitale. Arguments pour un mechanisme vasculaire.