title: Acute cerebral vascular accident associated with hyperperfusion.
abstract: Cerebral radionuclide angiography can demonstrate decreased or normal radioactivity in the affected region during the arterial phase in patients who have sustained a cerebral vascular accident and thus enhances the diagnostic specificity of the static brain image. In an occasional patient, however, a seemingly paradoxical pattern of regional hyperperfusion with a return to normal or subnormal perfusion following the acute phase has been observed. This phenomenon, called "luxury perfusion," has been defined using intra-arterial 133Xe for semiquantitative cerebral blood flow measurements and should be kept in mind as a potentially misleading cerebral imaging pattern.
mesh_terms: D001932:Brain Neoplasms / Q000175:diagnosis; D002543:Cerebral Hemorrhage / Q000175:diagnosis; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D010477:Perfusion; D011877:Radionuclide Imaging