hyperthyroidism/hypoxia

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Effect of hypoxia on mechanical properties of hyperthyroid cat papillary muscle.

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It has been previously established that hyperthyroid myocardium exhibits increased performance under well-oxygenated conditions. To date, it is not known whether hyperthyroid cardiac muscle can maintain this increased performance during hypoxia. The responses of isolated right ventricular papillary

Effect of hypoxia and catecholamine stimulation on cardiac performance in the isolated working hyperthyroid rat heart.

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The hyperthyroid heart has a greater oxygen demand due to its enhanced contractile state and higher basal metabolic rate. Consequently, it may be more sensitive to conditions of decreased oxygen supply or increased oxygen use. We, therefore, investigated the effect of a restricted oxygen supply

Halothane hepatotoxicity in hyperthyroid rats as compared to the phenobarbital-hypoxia model.

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Halothane hepatotoxicity was observed after exposing hyperthyroid rats to 0.625% halothane for 4 hr under hypoxic conditions (10% O2). In this model, increases in serum enzyme activities of the alanine aminotransferase (GPT) and the sorbitol dehydrogenase (SDH) were evident immediately following

[Impact of intermittent hypobaric hypoxia on the thyroid morphofunctional state in experimental hyperthyroidism].

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Within 5 days of hypoxia there was an increase in thyroid functional activity, but on days 15-30 there was a decrease in T3 and T4 concentrations and an increase in thyroid-stimulating hormone. Clear correlations were found between the morphometric indices of the thyroid epithelium and the blood

[EXPERIMENTAL ANIMAL STUDIES ON CEREBRAL CHANGES IN ACUTE AND CHRONIC HYPERTHYROIDISM AND THEIR MODIFICATIONS IN OXYGEN DEFICIENCY].

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The electrocardiographic response to the anoxemia test in patients with hyperthyroidism.

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[Potentiation of the radioprotective effect of hypoxic hypoxia in experimental hyperthyroidism].

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Comparison of effects of experimental hyperthyroidism and hypothyroidism on resistance to anoxia in rats and mice.

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Altered platelet indices in dogs with hypothyroidism and cats with hyperthyroidism.

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Changes in platelet indices (platelet count and platelet size) and PCV associated with thyroid disease were studied in 7 dogs with hypothyroidism and 21 cats with hyperthyroidism that were admitted to the veterinary teaching hospital. Compared with control (euthyroid) dogs, dogs with hypothyroidism

Thyroid hormone regulates fibronectin expression through the activation of the hypoxia inducible factor 1.

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Thyroid hormones regulate gene expression via both canonical and non-canonical signaling. Hyperthyroidism is associated with elevated plasma levels of fibronectin (FN): in this study we elucidate the molecular mechanism through which triiodothyronine (T3) regulates FN and demonstrate that T3 induces

Effects of thyroid hormone and hypoxia on 2,3-bisphosphoglycerate, bisphosphoglycerate synthase and phosphoglycerate mutase in rabbit erythroblasts and reticulocytes in vivo.

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OBJECTIVE The effects of triiodothyronine (T(3)) and hypoxia on 2,3-bisphosphoglycerate (2,3-BPG) studied in vitro are unclear. To clarify these effects we selected a more physiologic approach: the in vivo study in rabbits. We also present the changes produced by T(3) and hypoxia on phosphoglycerate

Thyroid state and tolerance of mammalian myocardium to hypoxia.

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Thyroid hormone is known to affect myocardial glycogen stores and thereby possibly limit anaerobic performance of mammalian cardiac muscle. Thyroid hormone administration (3,5,3'-triiodo-L-thyroxine, 300 microg/kg/day, sc) for 10 days decreased left ventricle (LV) glycogen concentration relative to

Effects of hypoxia and thyroid hormone on mRNA levels and activity of phosphoglycerate mutase in rabbit tissues.

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OBJECTIVE In the present work, we studied the effects of hypoxia and triiodothyronine (T(3)) on phosphoglycerate mutase (PGAM) activity and expression in rabbit liver, brain, and skeletal muscle under in vivo conditions. METHODS Hypoxia was induced in a methacrylate cage with a mixture of 90%

Regulation of breathing in hyperthyroidism: relationship to hormonal and metabolic changes.

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We sought to examine the breathing pattern, inspiratory drive and chemosensitivity of hyperthyroid patients and to explore the interactions between their thyroid hormones, basal metabolism and chemosensitivity. We studied 15 hyperthyroid patients and 15 sex- and age-matched controls. Thyroid hormone

[Hyperthyroidism as a cause of chronic anemia].

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Hyperthyroidism like cause of anemia is rare, normally in this pathology there is a increase of the erythropoiesis secondary to the cellular hypoxia causes by the increase of the basal metabolism. We have revised the histories of diagnostical hyperthyroidism in our center, which presented anemia, we

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