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Differentiating Hemodynamic Compromise by the OEF Response to Acetazolamide in Occlusive Vascular Disease

  • Edwin M. Nemoto
  • Howard Yonas
  • Hiroto Kuwabara
  • Ronda Pindzola
  • Donald Sashin
  • Yuefang Chang
  • Tudor Jovin
  • James Gebel
  • Maxim D. Hammer
  • Lawrence Wechsler
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 566)

Abstract

Identification of increased stroke risk in a population of symptomatic patients with occlusive vascular disease (OVD) is presently accomplished by measurement of oxygen extraction fraction (OEF) or cerebrovascular reserve (CVR). However, many regions identified by compromised CVR are not identified by OEF. Our aim was to determine whether the response of OEF to acetazolamide, namely, oxygen extraction fraction response (OEFR) would identify those hemispheres in hemodynamic compromise with normal OEF. Nine patients symptomatic with transient ischemic attacks and strokes, and with occlusive vascular disease were studied. Anatomical MRI scans and T2-weighted images were used to identify and grade subcortical white matter infarcts. PET cerebral blood flow (CBF) and OEF were measured after acetazolamide. The relationship between CVR and oxygen extraction fraction response (OEFR) showed that positive OEFR occurred after acetazolamide despite normal baseline OEF values. The two hemispheres with positive OEFR were also associated with severe (> 3 cm) subcortical white matter infarcts. We found that the OEFR was highly correlated with CVR and identified hemispheres that were hemodynamically compromised despite normal baseline OEF.

Keywords

Positron Emission Tomography Positron Emission Tomography Study Oxygen Extraction Fraction Hemodynamic Compromise Dynamic Positron Emission Tomography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Edwin M. Nemoto
  • Howard Yonas
  • Hiroto Kuwabara
  • Ronda Pindzola
  • Donald Sashin
  • Yuefang Chang
  • Tudor Jovin
  • James Gebel
  • Maxim D. Hammer
  • Lawrence Wechsler

There are no affiliations available

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