抄録
Once hyperperfusion occurs after carotid endarterectomy (CEA), artificial hypotension under sedation often needs to be induced until cerebral blood flow (CBF) improves. Arterial spin-labeling magnetic resonance imaging (ASL-MRI) can noninvasively evaluate cerebral blood perfusion. We investigated the usefulness of ASL-MRI in a series of patients with carotid artery stenosis who underwent CEA. We reviewed eight cases of carotid artery stenosis treated with CEA. In the preoperative examination, ASL-CBF had no correlation with the single-photon emission computed tomography (SPECT) -CBF finding (r = 0.03, p = 0.77). However, the ratio of the affected side to the healthy side on ASL-MRI had a significant positive linear correlation with that on SPECT (r = 0.74, p < 0.001). In two patients with hyperperfusion, ASL-MRI detected the hyperperfusion and serially tracked its improvement. Although ASL-CBF was less quantitative than the reference CBF value, it is a useful and noninvasive method to serially evaluate cerebral hemodynamics after CEA.
