RT Journal Article SR Electronic T1 Reversible ischemia determined by xenon-enhanced CT after 90 minutes of complete basilar artery occlusion. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1943 OP 1946 VO 19 IS 10 A1 E I Levy A1 A M Scarrow A1 E Kanal A1 G Rubin A1 H Yonas A1 L Kirby YR 1998 UL http://www.ajnr.org/content/19/10/1943.abstract AB Intraarterial thrombolytic therapy decreases mortality in the treatment of acute basilar artery occlusion. An acute decrease in cerebral blood flow (CBF) (<12 mL/100 g per minute) has been reported to invariably result in infarction. We report a case of acute basilar artery occlusion, recanalized within 90 minutes, with reversal of CBF of less than 6 mL/100 g per minute. After reperfusion, areas with persistent CBF of 6 mL/100 g per minute resulted in infarctions on subsequent CT studies. Parenchymal viability is possible after 90 minutes of posterior CBF of 6 mL/100 g per minute.