It has been noted that the posterior circulation serves as an important source of collateral blood supply in moyamoya disease. Since most of the literature has focused on non-operative cases and many symptomatic patients receive surgical revascularization, we evaluated the posterior circulation changes after revascularization and found that progressive posterior cerebral artery (PCA) steno-occlusive changes after revascularization caused cerebral hemodynamic compromise and clinical deterioration in a significant portion of patients.Twenty-three moyamoya disease patients with ischemic presentation who received revascularization with complete angiography and xenon CT during a minimum of 3 years' clinical follow-up were enrolled. Revascularization was performed in 38 hemispheres. Pre- and postoperative angiography were reviewed to determine the internal carotid artery (ICA) stage, PCA stage, leptomeningeal collateral (LMC) grade, and Matsushima synangiosis grade. The postoperative regional cerebral blood flow (CBF) and cerebral vascular reserve (CVR) were recorded and correlated with angiographic findings and clinical outcome.Progression of ICA staging was noted in 23 sides (55.2

作者：Abel Po-Hao, Huang；Hon-Man, Liu；Dar-Ming, Lai；Chi-Cheng, Yang；Yi-Hsin, Tsai；Kuo-Chuan, Wang；Shih-Hung, Yang；Meng-Fai, Kuo；Yong-Kwang, Tu

来源：Cerebrovascular diseases (Basel, Switzerland) 2009 年 28卷 3期