LEUKOARAIOSIS IN STROKE PATIENTS

Pathogenesis of leukoaraiosis (LA) is not clearly understood and its significance in patients with stroke remains undetermined. In the Neurol­ogy Department of Ankara Hospital, computed tomography (CT) examination of brain was performed for various reasons in 288 patients. LA was detected in 178 patients by the use of brain CT. Patients with LA had a higher incidence of hypertension history (70.8%) when compared with the non-LA group (57.3%; p <. 05). There was no statistically significant difference in terms of sex, mean age, smoking, diabetes mellitus, history of cerebrovascular disease, cardiac failure, ischemic cardiac disease between patients with and without LA. We showed that LA is related to hypertension but not related to age, diabetes mellitus, or cardiac disease in our patient population.     

Leuko-araiosis and stroke: a case-control study

Objective – Association of leuko-araiosis (LA) with certain risk factors has been reported in Western patients. This is a case-control study to determine the risk factors and the type of stroke associated with LA in Saudi patients. Design and setting - 398 consecutive Saudi patients with the diagnosis of stroke admitted over a 6-year period were evaluated for presence or absence of LA on cranial computed tomography. LA and non-LA groups were compared with regards to the presence of certain risk factors such as type of stroke, age, brain atrophy, systemic hypertension and history of cardiac disease or diabetes mellitus. The odds ratio and its 95% confidence interval (CI) were used to estimate the strength of association between the different parameters. Results – The mean age in the LA group was 67.8±8.5 years as compared to 61.2±13.2 years in the non-LA group. No patient younger than 40 years had LA on CT. Incidence of LA increased with age. Forty-seven percent of the LA group were over 70 years of age compared to 31 % of the non-LA group (OR=2, CI 1.26–3.15). Generalized atrophy was detected in 40% of patients with LA compared to 20% of non-LA group (OR 2.7, CI 1.65–4.39). Sixty-nine percent of patients in the LA group had lacunar infarct compare to 39% in the non-LA group (OR 3.4, CI 2.15–5.59). The difference was not significant between the two groups in relation to the frequency of cerebral hemorrhage or larger infarcts. Systemic hypertension was also significantly associated with the presence of LA (OR 2.15, CI 1.34–3.43). Conclusion – LA is associated mainly with lacunar infarcts, cerebral atrophy, systemic hypertension and advanced age in Saudi patients.     

Risk factors and leukoaraiosis in stroke patients

Objectives – Although leukoaraosis (LA) is a common CT finding, its pathogenesis remains debated: if small-artery pathology may explain in some cases white matter changes, many other factors, such as hemodynamic perturbations, might also lead to LA. To test these hypothesis, we determined the types of cerebrovascular risk factors associated with leukoaraosis in consecutive patients with acute cerebrovascular event. Patients and methods – Using CT-scans, we prospectively studied in 610 patients consecutively admitted for an acute cerebral event, the relation between LA and the following cerebrovascular risk factors: age, sex, arterial hypertension, diabetes mellitus, hyperlipemia, alcohol consumption, birth contraceptive pills, previous transient ischemic attack or stroke, migraine, atrial fibrillation, valvulopathy, coronaropathy, left ventricular hypertrophy, stenosis of the internal carotid artery, by means of a multiple linear regression. Relation with cerebral atrophy was also evaluated. Results – We found LA scores to depend on increasing age (p=0.0001), female sex (p=0.0146), history of stroke or TIA (p=0.0051), history or current atrial fibrillation (p=0.0083), increasing cerebral atrophy score (p=0.0001), absence of hyperlipemia (p=0.0003) and absence of alcohol consumption higher than 300 g/week (p=0.0398). Conclusion – Our findings do not support the hypothesis that, in stroke patients, LA share similar risk factors than small-vessel disease; other cerebrovascular risk factors may also contribute to LA, perhaps because of decreased cerebral blood flow.     

Mechanisms in lacunar infarction.

BACKGROUND AND PURPOSE: Lacunes are thought to occur in patients with hypertension or diabetes mellitus as a result of small-vessel disease. This study evaluated the importance of other stroke mechanisms in a population of patients with lacunar infarction. METHODS: We evaluated 108 consecutive patients with a lacune in the lenticulostriate distribution for other stroke risk factors such as carotid and cardiac disease. RESULTS: Hypertension was present in 68% of the patients and diabetes mellitus in 37%; both occurred in 28% and neither occurred in 23%. Noninvasive carotid studies identified atherosclerotic plaque as a possible embolic source in 23%. By previously established criteria, 18% were at high risk for cardioembolism. Of those with hypertension or diabetes mellitus, 36% were at risk for a carotid or cardiac embolus. Of those without hypertension or diabetes mellitus, 32% had a possible carotid or cardiac etiology. CONCLUSIONS: The high incidence of carotid and cardiac disease in those with and without hypertension or diabetes mellitus suggests the importance of other stroke mechanisms in this population. Patients with lacunar infarction should therefore be evaluated for other causes of stroke that may be treatable.     

Risk factors for intracerebral hemorrhage and coronary heart diseases over a 3-year period in patients admitted to some hospitals of Tongliao city of Nei Monggol Autonomous Region

BACKGROUND: Intracerebral hemorrhage(ICH) and coronary heart disease (CHD) have the same pathological base, atherosclerosis, and the similar risk factors,such as smoking ,drinking, hypertension, hyperlipemia, diabetes mellitus, etc; but the distributions of two diseases are very different in the populations. This may be related to the exposure of risk factors and different effects of risk factors on two diseases. OBJECTIVE: To analyze the distribution difference of risk factors for ICH and CHD in the populations of Tongliao city of Nei Monggol Autonomous Region. DESIGN: Retrospective analysis. SETTING: School of Radiation Medicine and Public Health, Soochow University; Tongliao Hospital, Nei Monggol Autonomous Region. PARTICIPANTS: Random sampling was used to select 6 hospitals from 10 hospitals affiliated to Tongliao City of Nei Monggol Autonomous Region. Totally 1 672 medical records of patients with ICH and 2 195 medical records of patients with CHD admitted to Department of Neurology and Department of Cardiovascular Internal Medicine of above-mentioned 6 hospitals between January 2003 and December 2005 were collected according to the investigation need. METHODS: The subjects, whose medical records were involved, were performed retrospective analysis with pre-prepared questionnaire "Stroke and Coronary Heart Disease Epidemiologic Questionnaire". The main contents included: ①Social demography condition: The distributions of gender, age, nationality, etc. ②Previous history of disease: hypertension, diabetes mellitus, etc. ③Related risk factors: systolic blood pressure, diastolic blood pressure, total cholesterol, triglyceride, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, smoking, drinking and glucose (GLU). The database of Epidata was transformed to SPSS database. Single-and multiple-factor non-conditional Logistic regression analysis were performed on the data, and OR value and 95% CI were calculated. The distribution differences of risk factors for two diseases were compared. MAIN OUTCOME MEASURES: Single- and multi-factor non-conditional Logistic regression analysis results of each factor of patients. RESULTS: Single-factor non-conditional Logistic regression analysis showed that statistical significance existed in gender, age, nationality, smoking, drinking, history of hypertension, history of diabetes mellitus, hypertension, triglyceride (TG), and GLU ten factors（OR =0.199, OR 95% CI 0.142–0.280 to OR =7.484, OR 95% CI 6.186–9.054, P < 0.01）. ②The results of multiple-factor non-conditional Logistic regression analysis showed 8 factors including age, gender, smoking, hypertension, history of hypertension, history of diabetes mellitus, GLU and TG（OR =0.203, OR 95% CI 0.114–0.361 to OR =8.262,OR 95% CI 5.466–12.491, P < 0.01）. CONCLUSION: ICH and CHD are the diseases induced by various risk factors. Significant difference exists in gender, age, smoking, hypertension, history of hypertension, GLU, history of diabetes mellitus and TG.     

Factors influencing the survival of 451 transient ischemic attack patients

Four hundred fifty-one patients with transient ischemic attacks (TIA) occurring within 1 month of hospitalization, admitted during 1977-1983, were analyzed to establish the effect on survival of age, race, sex, distribution of TIA, cigarette smoking, previous cerebral infarction or hemorrhage, previous TIA, or history of ischemic heart disease, valvular heart disease, cardiac dysrhythmia, hypertension, and diabetes mellitus. Proportional hazards analysis revealed that decreased survival was associated with increasing age, carotid artery distribution TIAs (compared with vertebrobasilar distribution TIAs), cigarette smoking, previous contralateral stroke, ischemic heart disease, and diabetes mellitus. We found great variation in the estimated survival of TIA patients, ranging from 5-year survivals of greater than 95% for 60-year-old patients with none of these risk factors to less than 25% for patients with all of these risk factors. Although the survival of the strata differed, the average mortality rates for this series of patients was about one-half of that observed for 225 patients accessed and followed by our center during 1961-1973.     

Correlates of leukoaraiosis and ventricular enlargement on magnetic resonance imaging: a study in normal elderly and cerebrovascular patients

Several studies have repeatedly demonstrated that leukoaraiosis as well as ventricular enlargement are common findings in normal elderly and in stroke patients, although there is no general consensus on prevalence rate as well as on their clinical correlations. It is also controversial whether white matter changes and ventricular enlargement are reciprocally related. In this study we investigated the prevalence and extent of white matter hyperintensities and the degree of ventricular enlargement on magnetic resonance imaging in 50 normal elderly individuals (mean age 62.1 ± 7.3 years) and in 50 consecutive chronic ischemic stroke patients (mean age 66.1 ± 7.7 years). All subjects underwent extensive clinical assessment. White matter hyperintensities were graded from 0 to 3 on a semi-quantitative scale, while bifrontal horn, bicaudate, and third ventricle ratio indices were used as measures of brain atrophy. Hypertension, diabetes, alcohol consumption, cardiac disease, carotid pathology occurred significantly more often in patients than in controls. Prevalence rates of white matter hyperintensities were 30% in controls and 82% in patients. Patients had significantly larger ventricular indices than controls. Significant univariate correlations for the extent of white matter hyperintensities were found with age, sex, hypertension, cardiac disease, carotid pathology, diabetes, history of stroke and ventricular enlargement. Age, sex, cardiac disease, alcohol habit, cerebrovascular disease and extent of white matter hyperintensities correlated with severity of ventricular enlargement. Multivariate regression analysis identified age, hypertension and history of stroke as independent predictors of white matter hyperintensities, while history of stroke, age and alcohol consumption were found as the only independent predictors of ventricular enlargement Separate analysis between periventricular, subcortical or deep white matter hyperintensities and each of the three ventricular indices failed to show a significant association after adjustment for clinical and demographic factors. We suggest that leukoaraiosis and ventricular enlargement are independent pathological processes associated with different risk factors in addition to age and stroke disease.     

The duration of symptoms in transient ischemic attack

BACKGROUND: The majority of TIAs last from 2 to 15 minutes, although some may be of long duration. OBJECTIVE: We examined factors related to the duration of TIAs to identify the relationship to clinical characteristics. METHODS: We performed brain imaging studies as well as angiographic and cardiac examinations in 81 consecutive patients (64 men and 17 women, age 65.8+/-9.9 years) with carotid TIAs. We evaluated risk factors (hypertension, diabetes mellitus, hyperlipidemia, alcohol consumption, and smoking), potential cardiac sources of emboli, and arterial stenosis > or =50% in diameter in the carotid or middle cerebral arteries. Recent infarcts were assessed with CT or MRI. We correlated duration of symptoms with clinical data. RESULTS: The presence of emboligenic cardiac or arterial diseases was significantly related to the duration of symptoms. With sensitivity-specificity curve analysis for detecting such diseases, the duration of symptoms could be divided into short-duration TIAs (<60 minutes, n = 41) or long-duration TIAs (> or =60 minutes, n = 40). Patients with long-duration TIAs had emboligenic cardiac or arterial diseases more frequently than those with short-duration TIAs (86% versus 46%, p < 0.001). Recent infarcts were also more frequent in patients with long-duration TIAs than they were in patients with short-duration TIAs (45% versus 21%, p < 0.05). CONCLUSIONS: Short-duration and long-duration TIAs can be separated based on symptom duration of < 1 hour or > or = 1 hour. Patients with long-duration TIAs should be examined more closely for the presence of cardiac and arterial diseases than those with short-duration TIAs.     

Correlation of clinical symptomatology with the results of brain imaging in cases of leukoaraiosis]

The aim of the study was establishing of correlations between the age of patients and their present and past diseases on one hand and the presence and intensity of leukoaraiosis (LA) on the other hand. The studied material comprised 91 patients hospitalized between Jan 1 1995 and June 15 1996 in whom features of LA were found on CT or MRI examination. Women and patients aged over 70 years prevailed in the group. Clinical analysis was based on neurological findings and routine diagnostic investigations. The intensity of LA lesions was assessed by means of a four grade scoring system known in literature. The analysis showed that higher grades of LA were more frequent on older patients: 14 had grade IV LA and 80 or more years of age. The greatest number of the patients had grade III LA and most of them were in the age range 70-80 years. Arterial hypertension was present in 64% of the patients, and more frequently it was associated with LA in younger patients. Stroke and myocardial infarction were given by 31% an 33% of the patients respectively in the history. Several had more than one stroke. Diabetes was found in 21 patients. Ischaemic brain episodes were the most cause of hospitalization.     

Anticardiolipin antibody in cerebral infarction

We investigated the anticardiolipin antibody (ACA) in a series of patients with cerebral infarction without systemic lupus erythematosus (SLA). Clinical and laboratory data were assessed from a series of 250 non-SLE patients with cerebral infarction who visited our clinic from 1988 to 1990. The concentration of anticardiolipin IgG antibody was measured by an enzyme-linked immunosorbent assay technique. An elevated ACA level was defined as one which was greater than 3 standard deviations above the mean level for normal controls. We examined the CT findings and risk factors for stroke such as hypertension, diabetes mellitus, hyperlipidemia and cardiac disease. Laboratory data such as the platelet count, the presence of lupus anticoagulant and a biologic false-positive test for syphilis were also investigated. Among the 250 patients with infarction, IgG ACA was detected in 22 (8.8%). There was no significant difference in incidence of ACA between the patients with cerebral thrombosis and those with cerebral embolism. On CT scan, multiple cerebral infarcts were noted in 18 of the 22 patients. As regards the location of the infarct, the cerebral cortex together with the basal ganglia was more common than isolated lesions of the cortex or basal ganglia. Concerning the risk factors for stroke, hypertension was noted in 12, diabetes mellitus in 2, hyperlipidemia in 2 and cardiac disease in 2. Lupus anticoagulant and thrombocytopenia were not detected in any of the cases. A biologic false-positive test for syphilis was observed in one case. Dementia was present in 12 of the 22 patients.(ABSTRACT TRUNCATED AT 250 WORDS)     

Cortical blindness: etiology, diagnosis, and prognosis

We examined 15 patients with cortical blindness, reviewed the records of 10 others, and compared these 25 patients to those in previous studies of cortical blindness. Although cerebrovascular disease was the most common cause in our series, surgery, particularly cardiac surgery, and cerebral angiography were also major causes. Only 3 patients denied their blindness, although 4 others were unaware of their visual loss. Electroencephalograms (EEGs) were performed during the period of blindness in 20 patients and all recordings were abnormal, with absent alpha rhythm. Visual evoked potentials recorded during blindness were abnormal in 15 of 19 patients, but did not correlate with the severity of visual loss or with outcome. Bioccipital lucencies were found in computed tomographic (CT) scans of 14 patients; none of the 14 regained good vision. Recovery of vision was poor in all 8 patients who had a spontaneous stroke, but fair or good in 11 of the other 17 patients. Prognosis was best in patients under the age of 40 years, in those without a history of hypertension or diabetes mellitus, and in those without associated cognitive, language, or memory impairments. We conclude that the prognosis in cortical blindness is poor when caused by stroke; EEGs are more useful than visual evoked potentials for diagnosis; and bioccipital abnormalities shown on CT scan are associated with a poor prognosis.     

缺血性脑白质疏松症危险因素的临床研究

目的基于头部MRI检查,通过分析伴发和不伴发脑白质疏松症(Leukoaraiosis,LA)的腔隙性脑梗死患者常见临床危险因素之间的差异,探讨LA可能的发病机制。方法经1.5TMRI检查证实的腔隙性脑梗死患者386例,分为单纯腔隙性脑梗死组(Isolated lacunar infarction,LI组)和伴发脑白质疏松症组(Lacunar infarctionwith leukoaraiosis,LA组),对两组的临床资料进行回顾性分析,详细记录两组的年龄、性别,有无高血压、2型糖尿病、冠心病、心房颤动、颈动脉粥样硬化、脑动脉硬化、高甘油三酯血症、高胆固醇血症、高尿酸血症和贫血等病史。结果LI组212例(54.9%),年龄32~91岁,平均61.05±11.95岁,LA组174例(45.1%),年龄38~98岁,平均68.52±9.59岁。在单因素分析中,LA组高龄、高血压、脑动脉硬化和2型糖尿病的发生率与LI组相比均有高度显著性差异(P<0.01)。在多因素Logistic回归分析中,脑动脉硬化、高血压、高龄为LA独立的危险因素,2型糖尿病不是独立危险因素。结论脑动脉硬化、高血压、高龄与LA的发病机制有着...     

Clinical characteristics of rapidly progressive leuko-araiosis

Introduction – 38 patients found to have either pure leuko-araiosis (LA) or LA combined with infarction(s) on computer tomography (CT) in 1989 were re-examined in 1992 in order to evaluate the progression of LA. The follow-up period averaged 3.2 years. Material and methods - The clinical and radiological data on patients in 1989 were collected from hospital records and re-evaluated. The patients were re-examined clinically (including 24 hour ambulatory blood pressure measurement), and neuroradiologically (CT) in 1992 for this study. Results – 11 (29%) patients were found to have significant (rapid) progression of the extent of LA on CT during the follow-up. At baseline, there was no significant difference in the mean number of brain infarctions between the groups with progressing (prLA) and non-progressing LA (nprLA) or between the number of cortical and central infarctions within these groups. At follow-up, the total number of infarctions had increased significantly in both groups, but it was mostly because of the increase in cortical infarctions in the prLA group (p = 0.043) and, conversely, the central ones in the nprLA group (p = 0.011). prLA was found to be related to heart failure (82% vs 37%, p = 0.029) and atrial fibrillation (55% vs 19%, p = 0.047), whereas nprLA was strongly associated with a sudden onset of symptoms (78% vs prLA 18%, p = 0.001) like a-true brain infarction. Other clinical factors, including mean blood pressure and heart rate, did not clearly differentiate between the groups. Conclusion - The results suggest that there are different subgroups of patients with LA associated with various vascular factors. The occurrence of LA is not related to the distribution of infarctions. The progression of LA is not related to the number of brain infarctions or to the simultaneous increase of infarctions on CT.     

H型高血压和脂蛋白相关磷脂酶A2对脑白质疏松症严重程度及预后的影响

目的 探讨H型高血压和脂蛋白相关磷脂酶A2(Lp-PLA2)对脑白质疏松症(LA)严重程度及预后的影响.方法 前瞻性入选沧州市中心医院2016年3月至2018年3月行头颅CT检查诊断有LA的住院患者,入院后24h内空腹化验血清Lp-PLA2;根据有无高血压和高同型半胱氨酸血症(Hhcy),把LA患者分为:A.同时伴高血...     

Could changes in arterioles impede the perivascular drainage of interstitial fluid from the cerebral white matter in leukoaraiosis?

Y. H. Huang, W. W. Zhang, L. Lin, J. Feng, X. X. Zhao, W. H. Guo and W. Wei (2010) Neuropathology and Applied Neurobiology 36, 237–247
Could changes in arterioles impede the perivascular drainage of interstitial fluid from the cerebral white matter in leukoaraiosis? Aims: Leukoaraiosis (LA) is the increase in fluid in cerebral white matter with hyperintensity on T2‐weighted MR imaging that occurs in 25% of individuals over 65 years of age and in Alzheimer's disease. Age, hypertension, diabetes mellitus and cardiac disease are the major risk factors for LA. Ischaemia is considered to be the cause of LA, but the aim of the present study is to assess whether changes in arterioles in LA could impede perivascular lymphatic drainage of interstitial fluid from the cerebral white matter. Methods: We quantified arteriolosclerosis and immunohistochemical changes in the extracellular matrix in arterioles of cerebral white matter in 20 hypertension autopsy cases with LA and in 10 controls. Results: The ratio of the area immunoreactive for collagen types I, III, V and VI to the cross‐sectional area of arterioles was significantly higher in LA patients compared with controls (P < 0.001). Changes were observed in collagen IV and laminin. The walls of white matter arterioles in LA were significantly thicker (P < 0.01), and lumina were significantly smaller (P < 0.01). Arterioles had a significantly higher sclerotic index [1 ? (internal/external diameter)] in LA than in adjacent cortex or control white matter (P < 0.01). Conclusions: Our results show that thickening and sclerosis of the walls of arterioles in cerebral white matter in LA are associated with the accumulation of extracellular matrix components. Although these changes may result in decreased perfusion, they could also impede perivascular lymphatic drainage of interstitial fluid from white matter in LA.     

What is the significance of leukoaraiosis in patients with acute ischemic stroke?

BACKGROUND: Leukoaraiosis (LA) may have specific clinical correlates in patients with stroke, but this is not well investigated, so that the significance of LA in patients with stroke remains unclear. METHODS: In a study of 2289 patients with a first-ever acute ischemic stroke, LA was noted in 149 by the use of baseline computed tomography of the brain. These patients were compared with the non-LA group. Statistical tests, including Fisher exact test or a chi(2) test, were used to compare variables, and a multivariate approach using stepwise logistic regression was performed. RESULTS: Patients with LA were significantly older (73.7 vs 62.7 years; P<. 001), and had a higher incidence of hypertension (72.5% vs 47.1%; P<. 001) and subcortical or lacunar infarction (40.3% vs 25.4% and 21.5% vs 8.0%, respectively; P<.001) on neuroimaging studies, compared with the non-LA group. The most common cause of stroke in the LA group was presumed to be small-artery disease associated with hypertension (46% vs 13.5% in the non-LA group). Age and hypertension were very strongly associated with LA (respective odds ratios [95% confidence intervals], 1.06 [1.04-1.08] and 2.33 [1.60-3. 39]). In addition to these risk factors, a close relationship was found between LA and nonsevere stenosis (<50%) of the internal carotid artery (odds ratio, 2.23 [95% confidence interval, 1.32-3. 76]), although the significance of this association remains speculative. The outcome at 1 month after stroke was similar in both groups. CONCLUSION: Our results provide further evidence that LA is related primarily to small-vessel disease.     

Clinical study of lacunar infarcts in non-hypertensive patients

Lacunar infarcts in non-hypertensive patients have been scantly assessed. The objective of this study was to determine clinical features of lacunar infarct in patients without hypertension (n = 91) in comparison with characteristics of lacunar infarcts occurring in patients with hypertension (n = 283) collected from a prospective hospital-based stroke registry in which 2000 patients with acute stroke are included. Predictors of lacunar infarct in patients without hypertension were assessed by multiple logistic regression analysis. The group of non-hypertensive patients with lacunar infarction showed a significantly higher frequency of male gender, age 85 years or older, history of atrial fibrillation, chronic obstructive pulmonary disease and diabetes mellitus, and a significantly lower frequency of female gender and absence of limitation at hospital discharge than hypertensive patients with lacunar infarct. Differences between hypertensive and non-hypertensive patients in relation to frequency of the different lacunar syndromes were not observed. After multivariate analysis, age 85 years or older (odds ratio 3.13), diabetes (odds ratio 2.57), and male gender (odds ratio 1.99) seemed to be independent factors associated with lacunar infarct in patients without hypertension. Lacunar infarct in non-hypertensive patients showed some differential clinical features compared to the remaining lacunar infarctions because it occurred more frequently in male patients aged 85 years or older. In this group, diabetes was the most important modificable risk factor. These results suggest an ealier effect of arteriopathy caused by hypertension favoring lacunar brain ischemia, whereas in non-hypertensive patients, arteropathy responsible for small vessel disease would take a more prolonged time in causing lacunar infarction.     

客家人群颈动脉闭塞的临床特点及相关危险因素分析

目的分析客家人群颈动脉闭塞的临床特点,并分析其相关危险因素。方法选取我院收治的120例颈动脉闭塞患者及同期收治的120例非颈动脉闭塞的患者为研究对象,回顾性分析所有研究对象颈CTA、头颅MRI+MRA检查结果及甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、血糖(Glu)、同型半胱氨酸(Hcy)、C反应蛋白(CRP)、糖化血红蛋白(HbA1c)等相关血生化指标,探讨客家人群颈动脉闭塞的临床特点及相关危险因素。结果 120例客家人群颈动脉闭塞患者中,前循环缺血表现93例(77.5%),后循环缺血8例(6.67%),无症状19例(15.83%),差异有统计学意义(P0.05);其中后交通动脉开放89例,前交通动脉开放45例,差异有统计学意义(P0.05)。颈动脉闭塞患者性别、年龄、TC、TG、LDL-C、HDL-C、CRP、HbA1c、Hey水平、冠心病病史、高血压史、糖尿病史与非颈动脉闭塞患者相比差异具有统计学意义(P0.05);LDL-C、Hcy、HbA1c、糖尿病史、高血压史、冠心病病史六项因素属于影响客家人群颈动脉闭塞相关危险因素。结论客家人群颈动脉闭塞以前循环系统缺血表现为主,主要表现为偏瘫、失语、偏身感觉障碍、头痛、发作性单眼盲(黑蒙);少数后循环缺血的临床表现为反复头晕或突发晕厥;后交通动脉为其主要代偿方式;LDL-C、Hcy、HbA1c、糖尿病史、高血压史、冠心病病史六项因素属于影响客家人群颈动脉闭塞相关危险因素,在颈动脉闭塞中发挥重要作用。     

Risk factors for occlusive lesions of intracranial arteries in stroke-free Japanese.

The aim of this study was to identify relevant risk factors for occlusive lesions of the intracranial arteries in stroke-free population. The subjects of this study were 425 patients without a history of stroke or transient ischemic attack and without any abnormality on a neurological examination who consecutively visited a neurology clinic between January 1994 and June 2001 requesting medical evaluation for possible cerebrovascular diseases. Subjects included 245 men and 180 women ranging in age from 33 to 89 years (mean+/-SD=64.0+/-10.0 years). We performed cervical and intracranial magnetic resonance angiography (MRA) in all subjects. Using a validated rating scheme of MRA for occlusive lesions, we evaluated the degree of stenoses in the extracranial portion of the internal carotid artery (ICA) and the intracranial arteries including the intracranial portion of the ICA, middle cerebral artery (MCA) stem, intracranial portion of the vertebral artery (VA), and basilar artery (BA). More than 25% stenoses were regarded as significant lesions in this study. Multiple logistic regression analyses showed that significant and independent predictors for extracranial ICA lesions were age, hyperlipidemia, and ischemic heart disease (IHD), those for intracranial ICA lesions were age, hypertension, diabetes mellitus, and IHD, those for MCA lesions were age and hypertension, those for intracranial VA lesions were hyperlipidemia and IHD, and those for BA lesions were hypertension and diabetes mellitus. The present study suggested that atherosclerosis of the intracranial VA was related to hyperlipidemia and IHD as was the case for the extracranial carotid artery, whilst atherosclerosis of other sites of intracranial arteries was associated with hypertension and diabetes mellitus in stroke-free Japanese.     

伴智能障碍的脑白质疏松症患者相关危险因素分析

目的分析伴智能障碍的脑白质疏松症(LA)患者的相关危险因素。方法 207例LA患者分为伴有智能障碍组和无智能障碍组,对患者的性别、年龄、高血压病史、糖尿病史、冠心病史及既往脑梗死病史等进行相关因素分析和Logistic回归分析。结果两组年龄、高血压病史、糖尿病史、既往脑梗死病史和LA的严重程度均有显著差异。多因素回归分析最终入选模型的变量是年龄、高血压病史、既往脑梗死病史和重度LA。结论高龄、高血压病史、既往脑梗死病史和重度LA,对LA是否伴智能障碍有独立的提示作用。