title: Flip-flop phenomenon and dissection of extracranial carotid artery.
abstract: A case of extracranial carotid artery dissection investigated both by conventional brain imaging and by arteriography is presented. The radionuclide angiogram showed a flip-flop phenomenon on the left hemisphere. The implications, including clinical features, pathogenesis, diagnosis, and treatment are discussed. Dissection of extracranial carotid artery is a cause of carotid hypoactivity, and this phenomenon is associated directly with a flip-flop phenomenon on brain imaging.
mesh_terms: D000784:Aortic Dissection / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002340:Carotid Artery Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002342:Carotid Artery, External; D002533:Cerebral Angiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D015609:Organotechnetium Compounds; D011877:Radionuclide Imaging; D013400:Sugar Acids; D013667:Technetium
chemical_list: D015609:Organotechnetium Compounds; D013400:Sugar Acids; D013667:Technetium; C100014:technetium Tc 99m gluceptate