title: Influence of respiratory maneuvers on jugular venous reflux.
abstract: The cause of jugular venous reflux during a radionuclide cerebral angiogram is uncertain. The authors describe a patient in whom physiologic respiratory maneuvers had a profound influence on the jugular venous reflux during cerebral radionuclide angiography. The massive jugular reflux was abolished by intravenous injection of a radiotracer bolus during inspiration. When brain blow data are difficult to interpret because of reflux, the authors suggest that radiotracer be administered intravenously during inspiration.
mesh_terms: D002533:Cerebral Angiography; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D012119:Respiration; D014636:Valsalva Maneuver; D014690:Venous Pressure