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AJNR - American Journal of Neuroradiology

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Transoral Ultrasonographic Evaluation of Carotid Flow in Predicting Cerebral Hemodynamics after Carotid Endarterectomy

M. Kamouchi^a,c, K. Kishikawa^a, Y. Okada^a, T. Inoue^b, K. Toyoda^a, S. Ibayashi^c and M. Iida^c

^a Department of Cerebrovascular Disease, Graduate School of Medical Sciences, Kyushu University
^b Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University
^c Department of Cerebrovascular Center and Clinical Research Institute, National Kyushu Medical Center; and Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Graduate School of Medical Sciences, Kyushu University

View larger version (14K): [in a new window]   Fig 1. Scatter-plot of poststenotic blood flow versus resting regional cerebral blood flow (rCBF) (ml/100 g/min, (A), postacetazolamide rCBF on the ipsilateral side (ml/100 g/min, (B), or VR (C). The abscissa indicates poststenotic flow of the extracranial distal internal carotid artery (ml/s). Lines were drawn based on the linear regression equation. Regression coefficients and P values are shown in the figures.

View larger version (14K): [in a new window]   Fig 2. Resting regional cerebral blood flow (rCBF) (A), postacetazolamide rCBF (B), and VR (C) on the ipsilateral side before, 2 weeks after, and 3 months after carotid endarterectomy (CEA). Group I, patients with poststenotic flow <3.5 mL/s; group II, patients with poststenotic flow >3.5 mL/s. The time courses in group I (open columns in A and B; open symbols in C) and group II (hatched columns in A and B, closed symbols in C) are shown. *, P < .05; #, P < .01, analysis of variance, versus preoperative value. Post hoc analysis was done by Fisher test.