Hypervascular Signs And Clinical Significance Of Magnetic Resonance FLAIR Sequence

Objectives 1 To study the significance of the corresponding vessel stenosis by observing the imaging character FLAIR FVH among the patients with acute cerebral infarction.2 To discover the value of early diagnosis of the patients with acute cerebral infarction on the basis of FVH.3 To explore the feasibility of recovery and evaluation on the short period prognosis.Methods Analyzed retrospectively,234 cases of patients were diagnosed with acute cerebral infarction and considered as criteria for this study.Among them,there were 87 FVH positive cases and 147 FVH negative cases,which were divided into distal FVH group and no distal FVH group according to the different distribution range of FVH.The imaging features of FVH and age,sex ratios were analyzed in 87 patients.The imaging features of lesions and the number of lesions were analyzed.In patients with MCA acute cerebral infarction,compared the relationship between FVH positive group and FVH negative group with the degree of stenosis of the responsible vessel,and further compared the general clinical data and prognosis of the two groups of patients with distal FVH and no distal FVH.The relevant results and information were analyzed on the basis of a unified questionnaire.NIHSS(National Health Stroke Scale)was used for relevant assessment.Established by Excel 2007.And the results were analyzed by SPSS statistical software and the differences were statistically significant.Results 1 A total of 234 patients were analyzed,FVH was positive in 87 cases,including 70(80.46%)cases of MCA FVH positive,5(5.75%)cases of FVH were PCA,12(13.79%)cases with positive FVH in the ACA FVH in the MCA was the highest.2 There were no significant differences in the composition ratio of FVH between male and female patients with middle cerebral artery infarction(?2=1.185,P=0.276)and patients aged <60 and ?60 years(?2=0.242,P=0.623).3 With the middle cerebral artery FVH as the study object,26 patients showed mild stenosis,FVH positive in 6 cases(23.08%),42 cases of severe stenosis,FVH positive in 12 cases(28.57%),and occlusion group in 94 cases.The positive rate of FVH was 52 cases(55.32%).The incidence of FVH in the stenotic occlusion group was higher than that in the mild-moderate stenosis group and the severe stenosis group(?2=13.579,P=0.001).The severity of middle cerebral artery stenosis was higher.The higher the proportion of FVH and the greater the degree of stenosis,the greater the risk of FVH.There is a linear relationship between the two(linear trend ?2=12.23,P=0.001).The difference is statistically significant.4 In the middle cerebral artery FVH group,the basic values of hyperglycemia,atrial fibrillation,and hyperlipidemia were 1.382,0.997,and 0.197,respectively;all had a P>0.05,and the difference was not statistically significant.In the past,patients with a history of hypertension were present.Upper,?2= 6.167,P= 0.013,the difference was statistically significant,the number of patients in FVH group was higher than those without FVH.5 In FVH and FVH-free groups,the infarct volume were 73.65±12.57mm3and 91.46±18.53 mm3,respectively.The admission NIHSS scores were 9.71±2.05,11.99±2.35,and the discharged NIHSS were 8.43±1.51,respectively.10.54±1.42,P<0.05,FVH patients had smaller infarct volume than those without FVH.The hospital admission score was lower than that of no FVH group.The discharge FVH was lower than the patients without FVH,and the prognosis was better than that of patients without FVH.The difference was statistically significant.6 In the basic clinical data of high blood glucose,atrial fibrillation,hyperlipidemia,etc.In patients with distal middle cerebral artery FVH and no distal FVH,the ?2 values were 1.604,1.041,and 2.922,respectively,all P >0.05,and the difference was not statistically significant.In patients with a previous history of hypertension,?2=7.624,P=0.006,the difference was statistically significant.Patients in the distal FVH group had a lower number of patients than those without distal FVH.7 Infarct volumes in distal middle cerebral artery and non-distal FVH groups were 72.09±13.47 mm3 and 90.71±17.31 mm3,respectively.The NIHSS scores were 8.61±2.41 and 10.88±3.44,respectively.Discharged NIHSS were 8.51±1.19,9.89±2.37,P<0.05,the difference was statistically significant.Far-infarct FVH patients had smaller infarct volume than those without distal FVH,and hospital admission scores were lower than those without distal FVH groups.Discharge scores were scored in distal FVH groups.Compared with patients without distal FVH,the prognosis was better than those without distal FVH.Conclusions 1 FVH is common in the middle cerebral artery,and there is no difference in the appearance of FVH with the patient's gender and age.2 There is FVH in the magnetic resonance FLAIR sequence.The formation of FVH may be due to severe arterial stenosis or occlusion.The slow blood flow makes the disappearance of air flow.3 FVH can in time make sure the major lesions area of blood vessel,degree of artery stenosis and cerebral infarction.At the same time,it can be the indirect sign of acute cerebral infarction,which is used of clinical value.4 In terms of MCA,it is available to apply FVH to evaluate the clinical prognosis of the patient with acute cerebral infarction,the recovery of teleneuron is possible.Patients with FVH have better neurological recovery and better prognosis.Patients with distal FVH have better neurological recovery and better prognosis,too.