摘要
Abstract
Objective To investigate the relationship between different types of internal watershed infarction (IWI) and tandem stenoses of internal and external carotid as well as the characteristics of Willis circle.Methods From January 2014 to May 2016,in the People’s Hospital of Feng-xianCounty,a total of 65 patients with IWI confirmed by CT angiogra-phy (CTA) and head magnetic resonance diffusion weighted imaging (DWI) were enrolled.According to the morphological characteristics of DWI,the 65 patients with IWI were divided into a partial internal watershed infarction (P-IWI) type group (n =29,44.6%) and a confluent internal watershed infarction(C-IWI) type group(n =36,55.4%).The relationship be-tween the two types of IWI and tandem stenoses of internal and external carotid as well as the characteristics of Willis circle was analyzed.Results (1)CTA showed a stenosis (≥50%) of carotid artery (ICA) or (and) middle cerebral artery (MCA) in 49 patients(49/65,75.4%).The tandem lesions incidences of MCA and ICA in P-IWI group were 71.4%(20 /29),17.2%(5 /29),10.3%(3 /29) respectively,and in C-IWI group were 80.6%(28 /36),58.3%(21/36), 44.4%(16 /36) respectively.(2) P-IWI group accounted for 55.2% (16/29) and C-IWI group accounted for 52.8%(19 /36) in the incidences of incomplete Willis ring (agenesis,dysplasia) based on morphological characteristics.Conclu-sion Different types of IWI are closely related with MCA stenosis,and C-IWI is an effective predictor of ICA stenosis. IWI is closely related to the incomplete circle of Willis based on intracranial and extracranial arterial.The morphological characteristics of Willis between the two groups has no significant differences.关键词
内分水岭脑梗死/CT 血管成像/动脉狭窄/Willis 环Key words
Internal watershed infarction/CT angiography/Artery stenosis/Willis circle分类
临床医学
