title: Transient obstruction of the internal carotid artery during angiography.
abstract: While performing carotid angiography in a 76-year-old man, we found that the right internal carotid artery repeatedly opened and closed during the examination. The patient experienced no related neurologic events. The explanation, confirmed at surgery, was that a flap associated with an atherosclerotic plaque had acted as a ball valve.
authors.affiliation: Department of Radiology, Washington University School of Medicine, St Louis, Mo 63110, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Cross
authors.forename: B T
authors.initials: BT
authors.lastname: Allen
mesh_terms: D000368:Aged; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging / Q000601:surgery; D016893:Carotid Stenosis / Q000000981:diagnostic imaging* / Q000601:surgery; D002533:Cerebral Angiography; D003937:Diagnosis, Differential; D016894:Endarterectomy, Carotid; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000000981:diagnostic imaging* / Q000601:surgery; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male