Search results for "cerebral infarction"
showing 10 items of 82 documents
Randomized, double-blind, placebo controlled, multicentre study of idebenone in patients suffering from multi-infarct dementia
1992
Abstract In this randomized double-blind, placebo controlled, multicentre study on 108 elderly patients with mild to moderate mental deterioration of vascular origin, idebenone — a benzoquinone derivative with a hydroxyalkyl side chain — proved to be therapeutically effective in the treatment of multi-infarct dementia. The oral administration of idebenone 45 mg/day b.i.d. for 120 days significantly improved the scores of the following test in comparison with placebo: Mini Mental State, Randt Memory Test, Gottfries Rating Scale, Token Test, Toulouse Pieron Test, indicating improvements in memory attention and cognitivity. The drug was well tolerated and effective in patients with multi-infar…
Plasma levels of inflammatory and thrombotic/fibrinolytic markers in acute ischemic strokes: Relationship with TOAST subtype, outcome and infarct site
2009
BACKGROUND: The aim of our study was to evaluate in patients with acute ischemic stroke the relationship between immuno-inflammatory variables, clinical outcome and infarct site. MATERIALS AND METHODS: We evaluated plasma levels of IL-1beta, TNF-alpha, IL-6 and IL-10, E-selectin, P-selectin, sICAM-1 ,sVCAM-1 vWF, TPA and PAI-1. RESULTS: Patients with cardioembolic subtype showed significantly higher median plasma levels of TNF-alpha, IL-6, IL-1beta whereas the lacunar subtype showed significantly lower median plasma levels of TNF-alpha, IL-6 and IL-1beta. CONCLUSIONS: A significant association was noted between the severity of neurological deficit at admission, the diagnostic subtype and so…
First-ever stroke incidence and 30-day case fatality in the Sicilian Aeolian archipelago, Italy
2005
Background and Purpose— Not many data on stroke epidemiology come from studies on islands. This is the first report on a Mediterranean archipelago population. Methods— Using recommended criteria, from July 1, 1999, to June 30, 2002, information was collected on first-ever stroke and 30-day case fatality in Aeolian island residents (13 431). Results— The overall crude incidence rate was 154 of 100 000 (95% CI, 118 to 197; 128 in men and 180 in women) or 180, 154, and 87, if adjusted to the Italian, European, and world populations, respectively. The 30-day case fatality rate was 24.2% (95% CI, 14.22 to 36.75). Conclusions— Besides genetic or dietary factors, our results may reflect local, li…
Single-dose ebselen does not afford sustained neuroprotection to rats subjected to severe focal cerebral ischemia
2004
Oxygen free radicals have been involved in the pathophysiology of cerebral ischemia, especially after spontaneous or thrombolytic reperfusion. In this study with rats, we have combined a severe focal ischemic insult (2 h) and a prolonged reperfusion time (7 days) to assess the possible sustained neuroprotective effect of ebselen (10 or 100 mg/kg), a small, lipophilic organoselenium compound which mimics glutathione peroxidase. Parietal cortical perfusion was measured by laser-Doppler flowmetry, and focal cerebral ischemia was carried out by the intraluminal thread method. We have measured plasma selenium levels, brain reduced glutathione levels, as a marker of oxidative stress, and infarct …
Dietary phytoestrogens improve stroke outcome after transient focal cerebral ischemia in rats.
2006
As phytoestrogens are postulated as being neuroprotectants, we assessed the hypothesis that dietary isoflavone-type phytoestrogens are neuroprotective against ischemic stroke. Transient focal cerebral ischemia (90 min) was induced by middle cerebral artery occlusion (MCAO) following the intraluminal thread technique, both in rats fed with soy-based diet and in rats fed with isoflavone-free diet. Cerebro-cortical laser-Doppler flow (cortical perfusion, CP), arterial blood pressure, core temperature, PaO2, PaCO2, pH and glycemia were measured before, during and after MCAO. Neurological examination and infarct volume measurements were carried out 3 days after the ischemic insult. Dietary isofl…
Neuronal immunoreactivity for mannose-binding lectin after venous occlusion-induced focal cerebral ischemia in rats
2012
Abstract A recent research reveals that complement activation exacerbates cerebral infarction. However, involvement of the lectin pathway, (the third complement activation pathway) in cerebral ischemia is not well studied. In this study, we investigated the appearance of mannose-binding lectin (MBL) in ischemic brain tissue. Male Wistar rats ( n = 25) were divided into three groups: untreated control, sham, and vein occlusion (VO). Rats in the VO group had two adjacent photochemically occluded cortical veins. Regional cerebral blood flow (rCBF) was measured in the sham and VO groups. Rats were perfusion-fixed at 72 h in the sham group and at 3, 24, and 72 h after inducing ischemia in the V…
TC perfusionale nell'ischemia cerebrale acuta: Valore predittivo dei parametri di perfusione cerebrale nel discriminare il tessuto vitale da quello i…
2007
Purpose. The aim of this study was to assess the value of computed tomography (CT) perfusion parameters in differentiating tissue viability in acute stoke patients. Materials and methods. Thirteen patients (mean age 63.3 years) with nonhaemorrhagic stroke underwent multidetector perfusion CT within 3 h of symptom onset. Images were continuously acquired at the basal ganglia over 40 s during injection of 90 ml of iodinated contrast medium injected at a rate of 9 ml/s with a 9-s delay. Z-axis coverage was 20 mm. All patients underwent diffusion-weighted magnetic resonance imaging (DWI) within 12 h of perfusion CT to define the extent of the infarct. Perfusion CT data were analysed in regions …
THE ROLE OF THROMBIN IN CENTRAL NERVOUS SYSTEM ACTIVITY AND STROKE
2018
Background. Thrombin is a key factor of hemostasis, mediating the conversion of fibrinogen into fibrin. Along with prothrombin, of which thrombin is the active derivative, it has been found locally expressed in the central nervous system. This article aims to describe the role of thrombin in the normal functioning of the central nervous system and stroke.Methods. In this mini-review, the specialized databases Medscape, PubMed, and Web of Science, from the years 2003-2018, were used to find relevant documents by using MeSH terms: ”thrombin” and ”stroke”.Results. Prothrombin and thrombin influence neural development, protection and regeneration, thrombin being a relatively strong regulating f…
Neuroprotection and glutamate attenuation by acetylsalicylic acid in temporary but not in permanent cerebral ischemia.
2007
To assess the effects of acetylsalicylic acid (ASA) on glutamate and interleukin-6 (IL-6) release in the striatum of rats suffering from cerebral ischemia, we used the microdialysis technique with probes implanted 2 h prior to stroke onset. A total of 36 rats were randomly assigned to either temporary (90 min, n = 18) or permanent (n = 18) middle cerebral artery occlusion (MCAO). Animals received either a bolus of 40 mg/kg ASA or saline as control 30 min after stroke onset. Permanent MCAO led to large infarct volumes with no differences between treatment with ASA (239.8 ± 4.1 mm3) and saline (230.1 ± 3.9 mm3, p = 0.15). In contrast, ASA therapy in temporary ischemia (87.2 ± 6.2 mm3) reduced…
Coagulation abnormalities in lacunar and cortical ischemic stroke are quite different
1998
In order to clarify the coagulation profile accompanying ischemic stroke, which may have implications on therapeutic strategies, we performed a prospective study to evaluate the hemostatic parameters in the first 24 h after the onset of cortical atherothrombotic infarct and lacunar infarction. Twenty-seven patients with cortical atherothrombotic infarction and 27 patients with lacunar infarction, diagnosed on clinical and CT-scan criteria, had blood samples taken within the first 24 h after onset of the stroke, and before anticoagulant treatment had been started. Levels of fibrinogen, von Willebrand factor, D-dimers, prothrombin factors 1 + 2, anti-thrombin III, and C-protein and S-proteins…