2008 Volume 21 Issue 1 Pages 18-21
We investigated the correlation between mean flow velocity (MFV) in the middle cerebral artery (MCA) detected by transcranial Doppler (TCD) during carotid artery stenting (CAS) and the cerebral blood flow (CBF) ratio of the MCA territory measured immediately after CAS in 23 patients. Cases with contralateral internal carotid artery occlusion and >80% stenosis were excluded. MFV ratio was defined as post-CAS MFV/pre-CAS MFV detected by continuous TCD. CBF ratio was defined as affected CBF of MCA/contralateral CBF of MCA detected by post-CAS xenon-computed tomography. MFV ratio was 1.36 ± 0.46, and CBF ratio was 1.13 ± 0.15. MFV ratio was significantly correlated with CBF ratio (r = 0.84, p<0.0001) .MFV ratio detected by continuous TCD during the CAS procedure may be a predictor of postoperative hyperperfusion.
