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noradrenaline/кръвоизлив
Линкът е запазен в клипборда
Страница 1 от 408 резултата
Reduced noradrenaline uptake and retention in cerebrovascular nerves associated with angiographically visible vasoconstriction following experimental subarachnoid hemorrhage in rabbits.
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Rabbits were injected with 1-2 ml autologous blood into the chiasmatic and basal cisterns to stimulate subarachnoid hemorrhage. Selective vertebral angiography performed at various time-periods following blood injection showed a 27 per cent reduction in basilar artery diameter within 3-5 days,
Effect of subarachnoid hemorrhage on contractile responses and noradrenaline release evoked in cat cerebral arteries by histamine.
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This study analyzes the changes induced by subarachnoid hemorrhage (SAH) on the contractile responses and the noradrenaline release evoked in cat cerebral arteries by histamine. The dose-dependent vasoconstriction induced by histamine on the cerebral arteries of normal cats was significantly reduced
Cardiovascular effects of noradrenaline in hypovolemic haemorrhage: role of inducible nitric oxide synthase.
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Hypovolemia has been associated with the induction of nitric oxide synthase which is believed to result in an over-production of nitric oxide. In the present study, we have examined the effects of noradrenaline following haemorrhage on cardiac output, blood pressure, mean circulatory filling
Changes of noradrenaline in brain homogenate of rats with brain injury secondary to intracerebral hemorrhage: a study of the mechanism.
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OBJECTIVE
To observe the changes of noradrenaline (NE) content dynamically in the homogenate of rat brain tissues during experimental intracerebral hemorrhage (ICH), so as to understand the role of NE in secondary brain injury.
METHODS
Seventy Wistar rats were randomly assigned into sham operation
Spectrum of altered reactivity of isolated cerebral arteries following subarachnoid haemorrhage--response to potassium, pH, noradrenaline, 5-hydroxytryptamine, and sodium loading.
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The circular contractile responses to various stimuli have been measured in segments of cerebral arteries (both middle cerebral and basilar) taken from dogs either 3 or 7 days following the cisternal injection of autologous blood under anaesthesia. The maximum contractile response to
Cerebrovascular reactivity to noradrenaline and serotonin following experimental subarachnoid hemorrhage.
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This study analyzes the time course of the changes induced by subarachnoid hemorrhage (SAH) in the sensitivity of cat cerebral arteries to noradrenaline and serotonin. Cerebral arteries to noradrenaline and serotonin. Cerebral arteries displayed a supersensitivity to these amines, which was most
Haemorrhage-induced release of noradrenaline, 5-hydroxytryptamine and uric acid in the supraoptic nucleus of the rat, measured by microdialysis.
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Concentrations of monoamines and metabolites and uric acid were measured in sequential 15-min microdialysis samples taken from the area of the supraoptic nucleus (SON) in 9 urethane-anaesthetized rats. A decrease in blood pressure of 40 mm Hg was induced by withdrawing 3-4 ml of blood from an
Noradrenaline concentrations and electrocardiographic abnormalities after aneurysmal subarachnoid haemorrhage.
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Serial ECGs and serial assessment of plasma noradrenaline concentrations were carried out in 37 consecutive patients with aneurysmal subarachnoid haemorrhage and 18 operated controls. Electrocardiographic abnormalities reflecting possible signs of cardiac ischaemia occurred significantly more often
On the patterns of blood pressure, heart rate, and blood levels of noradrenaline and adrenaline during haemorrhage in the rat.
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Mean arterial blood pressure (MAP), heart rate (HR), and blood levels of noradrenaline (NA) and adrenaline (A) were studied in Sprague-Dawley rats during haemorrhage. The bleeding was performed in different ways towards complete exsanguination or into a reservoir kept at a constant pressure of 35
Neonatal administration of a specific neuropeptide Y antiserum alters the vasopressin response to haemorrhage and the hypothalamic content of noradrenaline in rats.
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The possibility that neuropeptide Y (NPY) exerts organizational effects on central noradrenergic systems was investigated by treating newborn rats with subcutaneous injections of a specific NPY-antiserum. Three months later, neuroendocrine function was determined by measuring plasma vasopressin
Noradrenaline and dobutamine effects on the volume expansion with normal saline in rabbits subjected to hemorrhage.
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UNASSIGNED
To evaluate the effects of dobutamine (DB), noradrenaline (NA), and their combination (NADB), on volume retention in rabbits submitted to hemorrhage.
UNASSIGNED
Thirty six rabbits were randomly divided into 6 groups: SHAM, Control, Saline, DB, NA, DB+NA. All the animals, except for SHAM,
Effects of hydrocortisone, phenoxybenzamine and propranolol on the blood plasma levels of adrenaline and noradrenaline during hemorrhagic hypotension in the dog.
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The adrenergic aspects of the mechanism(s) of the vasodilating action of phenoxybenzamine and massive doses of hydrocortisone were studied in anesthetized dogs subjected to controlled hemorrhagic shock. During the predrug hypotension period with decreased cardiac output and heart rate, the plasma
Noradrenaline release in the median preoptic nucleus area caused by hemorrhage in the rat.
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The present study was designed to examine whether noradrenergic projections from the A1 cell group in the ventrolateral medulla to the median preoptic nucleus (MnPO) transmit information from the peripheral baroreceptors. In urethane-anesthetized male rats, extracellular concentrations of
Noradrenaline synthesis, release and vesicular transport in the rat brain following subarachnoid haemorrhage.
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The present study was designed to estimate the release of noradrenaline, and to evaluate the efficiency of noradrenaline vesicular transport, as indicated from measures of dihydroxyphenylglycol (DHPG), and synthesis in the medulla and hypothalamus following subarachnoid haemorrhage in rats.
Clinical significance of plasma adrenaline and noradrenaline concentrations in patients with subarachnoid haemorrhage.
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Plasma adrenaline and noradrenaline concentrations were measured in 21 patients after subarachnoid haemorrhage and in 13 control patients. Plasma noradrenaline concentrations were significantly raised in patients recovering from subarachnoid haemorrhage, confirming clinical evidence of overactivity
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