Abstract
The antiarrhythmic activity of fluoride was studied in a model of CaCL2-induced heart arrhythmias in male albino rats. The prolonged intake of sodium fluoride with drinking water (2 mg/l for 1 month) significantly reduced the severity of arrhythmias that was evident as an increase in the latency and a decrease in the frequency and duration of arrhythmias. A less pronounced effect was noted when the concentration of sodium fluoride was increased to 5 mg/l. At larger concentrations (11 mg/l) the fluoride exerted a toxic effect and potentiated the arrhythmogenic action of CACL2. The antiarrhythmic action of fluoride in low concentrations may be associated with the blockade of an inward Ca current.
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Fluoride-induced oxidative stress in rat myocardium through the Bax/Bcl-2 signalling pathway
The purpose of this study was to investigate whether fluoride (F) induces cardiotoxicity in rats and to discuss its underlying mechanisms by detecting morphological change, enzyme activity of oxidative stress, and the expression of Bcl-2 family protein. With increasing dosages of F, obvious pathological changes occurred in the myocardial tissue
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Analysis of x-ray heart areas of 30 patients with endemic fluorosis
I. Targets and methods Based on diagnosis standards formulated at the 1981 Shijiazhuang National Prevention of Endemic Fluorosis Meeting, 30 patients were chosen, 15 men and 15 women with an average age of 45, average height of 1.63 meters, and average weight of 54 kilograms, and all with clinical diagnoses
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Sodium fluoride produces a K+ efflux by increasing intracellular Ca2+ through Na+-Ca2+ exchange.
Acute fluoride intoxication increases intracellular calcium (Cai), manifested by increased twitch tension in cardiac muscle, and by potassium efflux (mediated by Ca2+-dependent K+ channels) in fluoridated erythrocytes. Fluoride, like isoproterenol, stimulates adenylate cyclase, and could increase Cai via the effects of cAMP on Ca2+ channels. However, while the inotropic effects
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Dose effect relationship between high fluoride intake and biomarkers of lipid metabolism in endemic fluorosis
Fluorosis is a metabolic hard tissue disease caused by ingestion of excessive amount of fluoride mainly through drinking water. We aimed to explore the dose effect correlation among some biochemical indexes of lipid metabolism in fluoride toxicity. Blood samples from 705 patients, age 20–60, with endemic fluorosis living in seven
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Effect of sodium fluoride on catecholamine concentrations in tissues from developing rats.
Catecholamine concentrations were determined in newborn rats treated with large doses of sodium fluoride (10 mg/kg) for varying periods of time. When fluoride treatment was started on day 5 after birth and continued daily to day 35 of life, decreased catecholamine concentrations were observed in the heart, kidney and liver.
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Fluoride & Electrocardiogram Abnormalities
An electrocardiogram (ECG) is a diagnostic test that measures the electrical activity of the heart. An ECG can reveal heart rate, heart rhythym (i.e. steady or irregular), and the strength and timing of the heart’s natural electrical signals. ECGs are described in terms of “waves” (e.g. amplitude and duration). Problems
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Fluoride & Arterial Calcification
The major change involved with cardiovascular disease is development of atherosclerosis in critical arteries, which is partially characterized by vascular calcification. The level of coronary artery calcification is thought to be the most important indicator of future cardiovascular events. Increased arterial calcifications have frequently been reported in those with skeletal fluorosis
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Fluoride & Myocardial Damage
Structural damage to the heart resulting from fluoride toxicity has been observed in numerous human and animal studies. The general features of this damage include cloudy swelling, vacuolization or vacuolar degeneration, hemorrhages, interstitial edema, fibrous necrosis, dissolution of nuclei, and thickening of the vessel walls in the heart muscle (Basha
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Fluoride & Arteriosclerosis
Healthy arteries are flexible and elastic, allowing efficient transfer of blood and nutrients from the heart to the rest of the body. Arteriosclerosis refers to a stiffening of the arteries, including loss of elasticity. This is a slow, progressive disease that may begin early in life from damage to the
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Fluoride, Blood Pressure and Hypertension
Individuals with blood pressure readings that exceed 140/90 are considered hypertensive. Hypertension can increase the risk of stroke, heart attack, heart failure, aortic aneurysms, and peripheral arterial disease. An association between increased fluoride in ground water and increased prevalence of hypertension has been observed, especially among adult males (Amini et
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