El magnesio sérico en niños normotensos, pre-hipertensos, hipertensos y obesos de edad escolar / Serum magnesium in normotensive, pre-hypertensive, hypertensive and obese school-age children

RESUMEN Introducción: la hipertensión, al igual que la obesidad, es un problema de salud a nivel mundial. En los últimos años esta situación ha aumentado en la edad infantil. Existe una estrecha relación inversa entre la ingestión del magnesio en la dieta, o en su suplementación, y los niveles de presión sanguínea. En la hipertensión hay presencia de las especies reactivas del oxígeno y las defensas antioxidantes pudieran estar afectadas. Objetivos: evaluar el comportamiento de las concentraciones del magnesio en niños pre-hipertensos, hipertensos y obesos en edad escolar. Métodos: se realizó un estudio descriptivo transversal. La muestra estuvo constituida por 501 infantes (8-11 años), los cuales se clasificaron según: los valores de presión arterial en reposo, sexo, color de la piel e índice de masa corporal. Las determinaciones del magnesio se realizaron por el método de absorción atómica con llama. Se utilizaron las pruebas: T student y U de Mann-Whinney, en la comparación de los grupos con un nivel de significación p< 0,05. Resultados: en el grupo total de niños no hubo diferencias en las concentraciones del magnesio. Los niños pre-hipertensos e hipertensos, del sexo femenino y piel blanca, de 9 años, presentaron disminución significativa de las concentraciones de magnesio. Los varones hipertensos normopesos presentaron diferencia significativa del magnesio en relación con los normotensos. No se encontró diferencia significativa en las concentraciones de magnesio al estudiar el índice de masa corporal. Conclusiones: las concentraciones de magnesio estuvieron disminuidas en los niños pre-hipertensos, hipertensos u obesos para determinados grupos de edad, sexo y color de la piel.

ABSTRACT Introduction: hypertension as obesity is considered a health problem worldwide. In recent years, this situation has increased in childhood. There is a close inverse correlation between the dietary intake of magnesium, or in its supplementation, and blood pressure levels. In hypertension, there is a presence of reactive oxygen species, as well as, antioxidant defenses may be affected. Objectives: to evaluate the manifestation of magnesium concentrations in pre-hypertensive, hypertensive and obese school-age children. Methods: a cross-sectional descriptive study was carried out. The sample consisted of 501 infants (8-11 years old), which were classified according to: blood pressure values at rest, gender, skin color and body mass index. The determinations of magnesium were made using flame atomic absorption spectrometry. Mann-Whitney U and Student's T Tests were used to compare groups with a significance level of p <0.05. Results: there were no differences in magnesium concentrations in the total group of children. Female pre-hypertensive and hypertensive white children aged 9 years showed a significant decrease in magnesium concentrations. Normal-weight hypertensive males had a significant difference in magnesium concentrations in relation to normotensive ones. No significant difference in magnesium concentrations was found when studying the body mass index. Conclusions: magnesium concentrations were decreased in pre-hypertensive, hypertensive or obese children for certain age groups, gender and skin color.

Acute Respiratory Failure Induced by Magnesium Replacement in a 62-Year-Old Woman with Myasthenia Gravis.

Magnesium is known to act at the neuromuscular junction by inhibiting the presynaptic release of acetylcholine and desensitizing the postsynaptic membrane. Because of these effects, magnesium has been postulated to potentiate neuromuscular weakness. We describe the case of a 62-year-old woman with myasthenia gravis and a metastatic thymoma who was admitted to our intensive care unit for management of a myasthenic crisis. The patient's neuromuscular weakness worsened in association with standard intravenous magnesium replacement, and the exacerbated respiratory failure necessitated intubation, mechanical ventilation, and an extended stay in the intensive care unit. The effect of magnesium replacement on myasthenia gravis patients has not been well documented, and we present this case to increase awareness and stimulate research. In addition, we discuss the relevant medical literature.

Association between carotid atherosclerosis and serum magnesium in hemodialyzed patients / 中国医师杂志

Objective To investigate the association between carotid atherosclerosis(AS) and serum magnesium(Mg) in hemodialyzed (HD) patients.Methods Clinical index was measured,and intimamedia thickness (IMT) of extracranial common carotid artery and presence of atherosclerotic plaques were determined by high-resolution B-mode ultrasonography.The data were analyzed between plaque positive group and plaque negative group.Results The age,serum phosphate (P),total cholesterol (TCH),low density lipoprotein (LDL),serum C-reactive protein (CRP),serum albumin(Alb),and serum Mg all had significant difference between two groups(t =4.153,2.908,2.301,6.322,5.791,2.341,7.778,P ＜0.01 or P ＜ 0.05).The risk factors of HD patients with AS were serum Mg and CRP(P ＜ 0.01).Conclusions The occurrence of AS was related to low Mg and high CRP in HD patients.

An Analysis of Microelements in Patients with High Myopia / 广州中医药大学学报

0.05) . Compared with group B, serum content of Cu2+ was markedly increased (P