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Transmural distribution of myocardial edema by NMR relaxometry following myocardial ischemia and reperfusion.
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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
The severity of ischemia determines and predicts malignant brain edema in patients with large middle cerebral artery infarction.
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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
Magnetic resonance imaging of brain edema in the neonatal rat: a comparison of short and long term hypoxia-ischemia.
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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
Protective effect of green tea polyphenol EGCG against neuronal damage and brain edema after unilateral cerebral ischemia in gerbils.
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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
Pre-treatment of adrenomedullin suppresses cerebral edema caused by transient focal cerebral ischemia in rats detected by magnetic resonance imaging.
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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
The protective effects of melatonin, vitamin E and octreotide on retinal edema during ischemia-reperfusion in the guinea pig retina.
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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
Protective effect of the 5-lipoxygenase inhibitor AA-861 on cerebral edema after transient ischemia.
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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
Blocking of interleukin-1 activity is a beneficial approach to ischemia brain edema formation.
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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 upon ischemia-induced brain edema in Mongolian gerbils and spontaneously hypertensive rats.
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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
Methylene Blue Ameliorates Ischemia/Reperfusion-Induced Cerebral Edema: An MRI and Transmission Electron Microscope Study.
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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 intraischemic hypothermia reduces postischemic hyperperfusion, delayed postischemic hypoperfusion, blood-brain barrier disruption, brain edema, and neuronal damage volume after temporary focal cerebral ischemia in rats.
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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
Duration threshold of induced hypertension on cerebral blood flow, energy metabolism, and edema after transient forebrain ischemia in gerbils.
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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
Cerebral ischemia and white matter edema in experimental hydrocephalus: a combined in vivo MRI and MRS study.
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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
[Macrophotographic measurement of brain surface area for evaluating brain edema after focal cerebral ischemia in mice].
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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
Recirculation after cerebral ischemia. Simultaneous measurement of cerebral bloodflow, brain edema, cerebrovascular permeability and cortical EEG in the rat.
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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,
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