本文關(guān)鍵詞：腦梗塞高信號血管征與腦血管狹窄及Willis環(huán)完整性的相關(guān)研究　出處：《中國臨床醫(yī)學(xué)影像雜志》2016年03期 　論文類型：期刊論文

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【摘要】：目的:探討磁共振FLAIR高信號血管征(HVS)在大腦中動脈供血區(qū)腦梗塞患者中的發(fā)生特點。方法 :回顧性分析急性大腦中動脈供血區(qū)腦梗塞患者的影像學(xué)資料,按出現(xiàn)癥狀到行MRI檢查時間的不同分為3組,分析總體HVS發(fā)生率及各組發(fā)生率,比較組間HVS的發(fā)生率差異。采用χ~2檢驗分析HVS的發(fā)生部位、分布范圍及級別與顱底血管狹窄情況及腦梗塞形態(tài)的相關(guān)性、統(tǒng)計分析不同Willis環(huán)類型患者發(fā)生HVS的差異。結(jié)果:HVS陽性率在≤24 h組為81.82%,2~4 d組為69.35%,5~7 d組為63.41%,HVS總體發(fā)生率隨時間延長呈下降趨勢,然各組間無明顯統(tǒng)計學(xué)差異。HVS發(fā)生隨血管狹窄程度增加而增高(P=0.000)。同時,M1段出現(xiàn)HVS時趨向為大片腦梗塞,而M4~5段出現(xiàn)HVS時趨向為散在腦梗塞。Willis環(huán)后循環(huán)不完整組較完整組出現(xiàn)HVS陽性率顯著增高(χ~2=7.089,P=0.008)。結(jié)論 :1HVS在急性大腦中動脈區(qū)腦梗塞早期具有較高陽性率,隨著時間延長而降低。2腦血管狹窄程度越嚴(yán)重其HVS分布越廣泛且級別越高。3M1段出現(xiàn)HVS趨向為大面積腦梗塞,M4~5段HVS趨向為散在小片腦梗塞。4Willis環(huán)缺損是腦梗塞形成的一個重要影響因素。Willis環(huán)后循環(huán)缺損患者HVS發(fā)生率顯著高于后循環(huán)完整者。
[Abstract]:Objective: to study the hyperintense vascular sign of magnetic resonance (FLAIR). The characteristics of cerebral infarction in the middle cerebral artery (MCAA) region. Methods: the imaging data of the patients with acute cerebral infarction in the MCAA region were analyzed retrospectively. The patients were divided into 3 groups according to the time from symptom onset to MRI examination. The overall incidence of HVS and the incidence of each group were analyzed. The incidence of HVS was compared between the two groups. 蠂 ~ 2 test was used to analyze the correlation between the location, distribution and grade of HVS and the stenosis of skull base vessels and the morphology of cerebral infarction. Results the positive rate of HVS in 鈮，

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