Kang Wang1, Zachary M. Smith1, David J. Dubowitz1
1University of California San Diego, La Jolla, CA, United States
Hypoxic hypoxia is accompanied by an increase in cerebral O2 metabolism, and despite increased cerebral blood flow there is reduced cerebral tissue oxygentation. We investigated if Acetazolamide (a carbonic anhydrase inhibitor that increases CO2 in the cerebral tissues) improves tissue oxygentaion during hypoxia. CMRO2 was measured using ASL and TRUST at 3T in human volunteers during normoxia, and following 6-hrs hypoxia with or without acetazolamide treatment. Following acetazolamide, the hypoxia-induced rise in CMRO2 and CBF were reduced. This resulted in improved oxygentation in cerebral tissues despite the continued hypoxia.