医学
大脑中动脉
侧支循环
数字减影血管造影
经颅多普勒
闭塞
放射科
狭窄
大脑后动脉
预测值
脑动脉
内科学
心脏病学
血管造影
缺血
作者
Yo-Sik Kim,D. O. N. D. Sin,Hyun-Young Park,Man‐Seok Park,Ki-Hyun Cho
标识
DOI:10.1111/j.1552-6569.2008.00242.x
摘要
ABSTRACT BACKGROUND Flow diversion (FD) has been considered as indirect evidence of intracranial artery occlusion, and it was associated with early improvement in patients with MCA occlusion. It is not known whether FD can represent leptomeningeal collateral circulation or not in patients with middle cerebral artery (MCA) occlusive disorder. PATIENTS AND METHODS FD was defined by increased velocity (>30%) in anterior or posterior cerebral artery (ACA, PCA) compared to contralateral analogs artery in patients with MCA occlusive disorder. The leptomeningeal collateral channel (LMC) was identified using digital subtraction angiography. RESULTS A total of 51 patients were enrolled in this analysis. Transcranial Doppler (TCD) showed a FD in 47% (24) of patients. Twenty‐three patients had FD in ACA, and 1 patient in PCA. LMC was identified in 41% (21) of patients. Sensitivity of FD for leptomeningeal collateral circulation was 81%, specificity 76.7%, positive predictive value 70.8%, and negative predictive value 85.2%. Presence of FD showed good correlation with presence of LMCs in patients with MCA stenosis ( r = .568, P = .00) CONCLUSION FD on TCD suggests the presence of leptomeningeal collateral circulation in patients with MCA occlusive disorder.
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