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- W2885535479 abstract "Background and Purpose—The alteration of regional cerebral blood flow (CBF) during and after hyperventilation was measured using positron emission tomography (PET) to determine the circulatory response induced by daily respiratory changes in the cerebral area under chronic hemodynamic stress. Methods—Three normal volunteers and 12 patients with an obstruction of major cerebral arteries underwent PET measurements of the CBF after an injection of H215O: (1) in the resting condition, (2) during hyperventilation (HV scan), (3) 1 to 3 minutes after hyperventilation (post-HV scan), (4) during the inhalation of 5% CO2, and (5) after an injection of acetazolamide. Eleven patients also underwent a 15O gas study to measure CBF, oxygen extraction fraction (OEF), and cerebral blood volume (CBV). Results—(1) In 9 patients, the CBF value in the post-HV scan was lower than that in the HV scan in 1 or more regions in the area of the obstructed arteries, although the Paco2 level during the post-HV scan was higher than tha..." @default.
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- W2885535479 date "1998-07-01" @default.
- W2885535479 modified "2023-09-24" @default.
- W2885535479 title "Posthyperventilatory Steal Response in Chronic Cerebral Hemodynamic Stress" @default.
- W2885535479 hasPublicationYear "1998" @default.
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