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Bls 1 frá 773 niðurstöður
Role of histamine and acid back-diffusion in modulation of gastric microvascular permeability and haemorrhagic ulcers in betel-quid-fed rats.
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Evidence concerning the pathogenesis of gastric haemorrhagic ulcer produced by betel quid chewing (BQC) is lacking. This research first proposes that alterations of mast cell histamine release and gastric acid back-diffusion are important in modulating gastric microvascular permeability and mucosal
Treatment with histamine H2 antagonists in acute upper gastrointestinal hemorrhage. Implications of randomized trials.
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Histamine H2 antagonists are widely used in treating patients with hematemesis and melena, despite the lack of reliable evidence of benefit from any of the randomized trials, considered separately. Examination of the data from all 27 available randomized trials, in which over 2500 patients were
Involvement of the sympathetic nervous system in the reversal of critical haemorrhagic hypotension by endogenous central histamine in rats.
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An increase in endogenous central histamine concentration after inhibition of histamine N-methyltransferase (HNMT) activity reverses critical hypotension and improves the survival of rats in haemorrhagic shock. The purpose of the study was to examine the involvement of the sympathetic nervous system
Involvement of proopiomenalocortin-derived peptides in endogenous central histamine-induced reversal of critical haemorrhagic hypotension in rats.
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An increase in endogenous central histamine concentrations, after loading with histamine precursor L-histidine or inhibition of histamine N-methyltransferase (HNMT) activity, produces the reversal of critical hypotension with improvement in survival of haemorrhage-shocked rats. In the present study,
Cardiovascular effects of H3 histamine receptor inverse agonist/ H4 histamine receptor agonist, clobenpropit, in hemorrhage-shocked rats.
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Hemorrhagic shock has a potential to be life-threatening when it is not treated. The main causes of hemorrhagic shock involve: (1) forces causing injury; and (2) diseases that can cause hemorrhage., Therefore, due to the causes of hemorrhagic shock and the life-threatening potential, the search for
Omeprazole versus histamine H2 receptor antagonists in the treatment of acute upper non-variceal bleeding.
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OBJECTIVE
To compare the efficacy of omeprazole, a proton pump inhibitor, with Histamine H2 receptors antagonists in the control and recurrence of non-variceal upper gastrointestinal bleeding.
METHODS
Seventy-one patients (Group A, Omeprazole) with definite diagnosis of upper gastrointestinal
[Effect of the histamine H2-receptor antagonist zantac on lipid peroxidation an antioxidant system in patients with gastroduodenal hemorrhage of ulcer etiology].
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High lipid peroxidation rates and lower antioxidative protection were found in the serum of 64 patients with gastric (n = 20) and duodenal (n = 44) ulcers complicated by hemorrhage. The administration of zantac, a histamine H2-receptor blocker, considerably reduced lipid peroxidation and enhanced
Role of histamine H2 receptor antagonists in nonoperative management of gastroduodenal ulcer haemorrhage.
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Acute massive gastroduodenal ulcer haemorrhage may be caused by peptic ulcers or acute stress ulcerations. The former is a clinical problem that is met with fairly frequently, associated with a mortality of 10-20%. Bleeding stress ulcerations are less common but have a still more serious prognosis.
Histamine level changes in the plasma and tissues in hemorrhagic shock.
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Histamine (H) levels have been reported during various types of shock, but there is a paucity of such data during hemorrhagic shock. The present study demonstrates a rapid, severalfold increase of radioenzymatically measured plasma H in conscious and anesthetized dogs subjected to experimental
Histamine-induced fluid efflux in the canine forelimb as affected by carotid occlusion or hemorrhage.
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Infusion of catecholamines concurrently with histamine into the forelimb of the dog prevents histamine-induced increases in lymph flow, protein concentration and forelimb weight. This study tested whether the sympathoadrenal discharge of catecholamines induced by carotid occlusion or hemorrhage
Endogenous central histamine-induced reversal of critical hemorrhagic hypotension in rats: studies with L-histidine.
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Activation of the histaminergic system is characteristic of response to the action of adverse or potentially dangerous stimuli that disturb circulatory homeostasis, such as dehydration and changes in blood pressure. Previous study demonstrates that inhibition of histamine N-methyltransferase, which
Central histamine-induced reversal of critical haemorrhagic hypotension in rats--haemodynamic studies.
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Volume-controlled irreversible haemorrhagic shock in rats produced by blood withdrawal until stabilisation of critical mean arterial pressure (MAP) 20-25 mmHg is associated with an extreme decrease in cardiac index (CI) and an increase in total peripheral resistance index (TPRI), with reductions in
Effect of histamine on haemorrhagic mucosal lesions is related to vascular permeability in rats: studies with histamine, H1-, H2- and H3-agonists and bradykinin.
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OBJECTIVE
To test the hypothesis that an early increase in vascular permeability is correlated with later gastric mucosal protection in the rat.
METHODS
Histamine, its agonists (H1, H2, H3) and bradykinin, were either given subcutaneously or intragastrically before the intragastric administration of
Histamine restores hemorrhage induced hypotension by activating cholinergic neurons in nucleus tractus solitarius.
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The purpose of the current study is to investigate the functional connections between the central histaminergic and cholinergic systems at NTS level in hypotensive condition. Experiments were carried out in male Wistar Albino rats. The hypotension was achieved by withdrawing a total volume of 1.5ml
Histamine in lambs with abomasal bloat, haemorrhage and ulcers.
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The median concentration of histamine in abomasal fluid of lambs with abomasal haemorrhage and/or ulcers (group 2) was significantly (P < 0.05) higher than the concentrations in lambs presenting abomasal bloat (group 1) and in the healthy and the diseased controls. In group 2, there was also a
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