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Fig 3. Relationship between preoperative CBV, preoperative CBV ratio, and post-CEA hyperperfusion. All 7 patients with post-CEA hyperperfusion are located in the quadrant with elevated CBV and an elevated CBV ratio. Open circle indicates patients without post-CEA hyperperfusion. Closed circle indicates patients with post-CEA hyperperfusion. Arrows indicate patients who developed hyperperfusion syndrome. Horizontal dashed line indicates the mean + 2 SD for CBV ratio defined in healthy subjects. Vertical dashed line indicates the mean + 2 SD for CBV defined in healthy subjects.
