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Long-term noninvasive single photon emission computed tomography monitoring of perfusional changes after EC-IC bypass surgery.
  1. V Di Piero,
  2. G L Lenzi,
  3. M Collice,
  4. F Triulzi,
  5. P Gerundini,
  6. D Perani,
  7. A R Savi,
  8. C Fieschi,
  9. F Fazio
  1. Department of Neurological Sciences, University of Rome, Italy.


    The rCBF was evaluated using I-123 HIPDM and single photon emission computed tomography (SPECT) on 14 patients undergoing extracranial-intracranial (EC-IC) bypass surgery because of internal carotid artery (ICA) occlusion. Before surgery, all patients showed cortical areas of hypoperfusion over the affected cerebral hemisphere. Shortly after EC-IC bypass a rCBF increase was observed in six patients. However, at the 6 and 12 month follow-ups, with angiographic control of bypass patency, rCBF studies did not show any significant rCBF change. Long-term noninvasive tomographic monitoring of perfusion changes occurring after EC-IC bypass surgery failed to show a long-lasting improvement in perfusion.

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