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To determine the distribution and extent of myocardial edema resulting from ischemia and reperfusion, seven open-chest dogs underwent occlusion of the left circumflex coronary artery for 2 hours (group I), and 10 underwent occlusion for 2 hours and reperfusion for 2 hours (group II). Proton nuclear
BACKGROUND
In order to determine the impact of the severity of ischemia on malignant edema formation, we investigated various degrees of perfusional deficit by (11)C-flumazenil PET in patients with large middle cerebral artery (MCA) infarction.
METHODS
17 patients with large MCA stroke were
Diffusion-weighted and transversal relaxation time (T2)-weighted magnetic resonance imaging were used to study the relationship between the duration of hypoxia-ischemia [unilateral common carotid artery (CCA) ligation and exposure to 8% oxygen] and the in vivo visualization of brain edema in 7-d-old
Previous studies have demonstrated that a green tea polyphenol, (-)-epigallocatechine gallate (EGCG), has a potent free radical scavenging and antioxidant effect. Glutamate leads to excitotoxicity and oxidative stress, which are important pathophysiologic responses to cerebral ischemia resulting in
Recent studies suggest the protective effects of adrenomedullin (AM) on ischemic brain damage. The present study was aimed at investigating the effects of AM and its receptor antagonist, AM₂₂₋₅₂, on ischemia-induced cerebral edema and brain swelling in rats using magnetic resonance imaging. Rats
OBJECTIVE
The purpose of this study is to provide evidence that free radical damage is a component of retinal ischemia-reperfusion (I/R) injury, and to determine whether melatonin, vitamin E and octreotide can protect retina from this injury.
METHODS
The right eyes of 50 male guinea pigs weighing
This study examined the effect of AA-861, a specific 5-lipoxygenase inhibitor, on brain levels of leukotriene C4 (LTC4) and correlated any changes with changes in edema formation and cerebral blood flow (CBF) after transient ischemia in gerbils. Brain levels of LTC4 were observed to be increased at
We examined the therapeutic value of an interleukin-1 inhibitor on brain edema formation using a transient focal ischemia model in rats. Rats were given an interleukin-1 blocker, or interleukin-1 release inhibitor immediately after reperfusion. In rats treated with interleukin-1 inhibitor, ischemic
Effects of S-adenosyl-L-methionine (SAMe).2 sulphate.tosylate upon the ischemia-induced brain edema and survival rate in Mongolian gerbils and spontaneously hypertensive rats were investigated, since SAMe is known to be important as a physiologically active substance in numerous metabolic processes
The neuroprotective effect of methylene blue (MB) has been identified against various brain disorders, including ischemic stroke. In the present study, we evaluated the effects of MB on postischemic brain edema using magnetic resonance imaging (MRI) and transmission electron microscopy (TEM). Adult
Mild to moderate hypothermia (30-33 degrees C) reduces brain injury after brief (< 2-h) periods of focal ischemia, but its effectiveness in prolonged temporary ischemia is not fully understood. Thirty-two Sprague-Dawley rats anesthetized with 1.5% isoflurane underwent 3 h of middle cerebral artery
We have investigated whether there is a duration threshold for the effects of phenylephrine-induced hypertension on CBF, brain energy metabolism, and cerebral parenchymal specific gravity (SG) following transient forebrain ischemia in gerbils. Sixty gerbils were randomly assigned to one of the four
T2 and diffusion weighted MRI, as well as 31P and 1H MRS were performed in kaolin-induced hydrocephalic rats. Extracellular white matter edema was detected in the early stages of progressive hydrocephalus. Phosphocreatine (PCr)/inorganic phosphate (Pi) ratios in hydrocephalic animals were decreased
OBJECTIVE
To establish a new macrophotographic measurement of brain surface area to evaluate brain edema after focal cerebral ischemia in mice.
METHODS
Permanent focal cerebral ischemia was induced by middle cerebral artery occlusion (MCAO) in mice. The brains were removed 10,30 min,1,3,6,12 and 24
The 4-vessel occlusion rat model of cerebral ischemia was modified to permit the simultaneous measurement of cerebral blood flow (hydrogen clearance), brain edema (specific gravity), cerebrovascular permeability (14C-AIB) and electrocardiogram. Surgery was performed in one stage in the anesthetised,