title: Basilar artery response to hyperventilation in panic disorder.
abstract: OBJECTIVE
  The purpose of this study was to measure the response of basilar artery blood flow to hyperventilation in patients with panic disorder.
  
  
  METHODS
  Transcranial Doppler ultrasonography was used to measure basilar artery flow during rest and after hyperventilation in 16 patients with panic disorder and eight normal comparison subjects. The subjects rated their dizziness at each phase.
  
  
  RESULTS
  The patients with panic disorder demonstrated greater reduction in flow rates and greater increases in dizziness than the normal comparison subjects.
  
  
  CONCLUSIONS
  The greater basilar artery sensitivity to hyperventilation shown by panic disorder patients suggests a possible mechanism for the development of neurological symptoms during panic attacks.
authors.affiliation: Department of Psychiatry, Indiana University School of Medicine, Indianapolis 46202-5266, USA.
authors.forename: S
authors.initials: S
authors.lastname: Ball
authors.forename: A
authors.initials: A
authors.lastname: Shekhar
mesh_terms: D000328:Adult; D001488:Basilar Artery / Q000503:physiopathology*; D002245:Carbon Dioxide / Q000097:blood*; D004244:Dizziness / Q000209:etiology; D005260:Female; D006801:Humans; D006985:Hyperventilation / Q000097:blood / Q000503:physiopathology*; D008297:Male; D016584:Panic Disorder / Q000175:diagnosis* / Q000503:physiopathology; D012039:Regional Blood Flow / Q000502:physiology
chemical_list: D002245:Carbon Dioxide