Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
1.
Bol. malariol. salud ambient ; 62(1): 32-38, jun, 2022. tab, ilus
Artículo en Español | LILACS, LIVECS | ID: biblio-1379293

RESUMEN

Hay dos tipos principales de tejido adiposo; el subcutáneo, que es menos activo metabólicamente, y el tejido adiposo visceral, que secreta constantemente citocinas inflamatorias y está relacionado a enfermedades metabólicas y cardiovasculares. Nuestro objetivo fue identificar la asociación entre el exceso de grasa visceral y la severidad de enfermedad en pacientes con COVID-19. Se realizó un estudio observacional analítico que incluyó a pacientes con COVID-19 admitidos al Hospital Carrión de Huancayo, Perú. Se utilizó la balanza de bioimpedancia para cuantificar la composición corporal, la variable dependiente fue la severidad de enfermedad. Se utilizó el análisis de regresión logística para determinar la asociación de la grasa visceral y otros parámetros antropométricos con severidad de enfermedad. Se analizaron a 120 personas con COVID-19, la edad promedio fue 50 años, el sexo masculino fue 60%. De acuerdo a los valores de la composición corporal emitidos por el equipo de bioimpedancia: La grasa visceral > 15Kg (OR 7,31; p = 0,001); la grasa corporal total > 35% (OR 5,58; p = 0,009) y el exceso de peso > 20Kg (OR 6,96; p = 0,011) fueron los parámetros asociados a enfermedad severa por COVID-19. La relación positiva entre el perímetro abdominal y la cantidad de grasa visceral fue significativo (p = 0,01). En la composición corporal, el exceso de grasa visceral es el mayor parámetro asociado a enfermedad severa por COVID-19(AU)


There are two main types of adipose tissue; the subcutaneous, which is less metabolically active, and the visceral adipose tissue, which constantly secretes inflammatory cytokines and is related to metabolic and cardiovascular diseases. Our objetive was to identify the association between the excess of visceral fat and disease severity in COVID-19 patients. An analytical observational study was carried out which included patients with COVID-19 admitted to the Carrión Hospital in Huancayo, Peru. The bioimpedance balance was used to quantify the body composition; the dependent variable was the severity of the disease. A logistic regression analysis was used to determine the association of visceral fat and other anthropometric parameters with the severity of the disease. Out of 120 people with COVID-19 were analyzed, the average age was 50 years, the male sex was 60%. According to the body composition values issued by the bioimpedance team: Visceral fat> 15Kg (OR 7.31; p = 0.001); Total body fat> 35% (OR 5.58; p = 0.009) and excess weight> 20Kg (OR 6.96; p = 0.011) were the parameters associated with severe disease due to COVID-19. The positive relationship between abdominal circumference and the amount of visceral fat was significant (p = 0.01). In body composition, excess visceral fat is the main parameter associated with severe COVID-19 disease(AU)


Asunto(s)
Humanos , Masculino , Femenino , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Síndrome de Dificultad Respiratoria del Recién Nacido/epidemiología , Grasa Intraabdominal/fisiopatología , COVID-19/fisiopatología , COVID-19/epidemiología , Obesidad/fisiopatología , Perú/epidemiología , Índice de Severidad de la Enfermedad , Índice de Masa Corporal , Modelos Logísticos , Análisis de Regresión , Hospitales
2.
Acta cir. bras ; 37(1): e370105, 2022. tab, graf
Artículo en Inglés | LILACS, VETINDEX | ID: biblio-1364250

RESUMEN

Purpose: To evaluate how the induction of liver damage by ischemia and reperfusion affects the adipose tissue of lean and obese mice. Methods: Lean and diet-induced obese mice were subjected to liver ischemia (30 min) followed by 6 h of reperfusion. The vascular stromal fraction of visceral adipose tissue was analyzed by cytometry, and gene expression was evaluated by an Array assay and by RT-qPCR. Intestinal permeability was assessed by oral administration of fluorescein isothiocyanate (FITC)-dextran and endotoxemia by serum endotoxin measurements using a limulus amebocyte lysate assay. Results: It was found that, after liver ischemia and reperfusion, there is an infiltration of neutrophils, monocytes, and lymphocytes, as well as an increase in the gene expression that encode cytokines, chemokines and their receptors in the visceral adipose tissue of lean mice. This inflammatory response was associated with the presence of endotoxemia in lean mice. However, these changes were not observed in the visceral adipose tissue of obese mice. Conclusions: Liver ischemia and reperfusion induce an acute inflammatory response in adipose tissue of lean mice characterized by an intense chemokine induction and leukocyte infiltration; however, inflammatory alterations are already present at baseline in the obese adipose tissue and liver ischemia and reperfusion do not injure further.


Asunto(s)
Animales , Ratones , Daño por Reperfusión/veterinaria , Interleucina-6 , Endotoxinas/análisis , Grasa Intraabdominal/fisiopatología , Inhibidores del Factor de Necrosis Tumoral/análisis
3.
Int. j. cardiovasc. sci. (Impr.) ; 33(3): 245-251, May-June 2020. tab
Artículo en Inglés | LILACS | ID: biblio-1134360

RESUMEN

Abstract Backgroud: Central obesity, especially visceral adipose tissue (VAT), represents a health risk due to its endocrine and metabolic capacity, contributing to the development of the atherogenic profile and strongly associating with cardiovascular morbimortality. Objective: To identify the association between central obesity and biochemical markers of cardiometabolic risk in elderly patients treated at a geriatric outpatient clinic in Lagarto-SE. Method: This is a cross-sectional study of 159 elderly people of both sexes. Central adiposity was considered an independent variable, identified by measuring the Waist Circumference (WC). Total Cholesterol (TC), LDL-c, HDL-c, non-HDL-c, triglycerides, glycemia and Castelli I and II indices were considered dependent variables. Pearson's chi-square test was used to evaluate the association between central obesity and biochemical markers of cardiometabolic risk. Those with p < 0.20 were used in the bivariate regression analysis, adopting a 95% confidence interval. Results: Mean age was 70.9 ± 7.5 years. Central obesity was present in 43.2% of males and 56.8% of females (p = 0.002). There was statistically significant association between HDL-c, HDL-C and Castelli I Index and central obesity. Individuals with central obesity are 2.48 and 3.13 times more likely to develop changes in HDL-C and Castelli I index, respectively. Conclusion: There is an association between central obesity and biochemical markers of cardiometabolic risk in the elderly.


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Anciano , Grasa Intraabdominal/fisiopatología , Obesidad Abdominal/complicaciones , Factores de Riesgo Cardiometabólico , Biomarcadores , Estudios Transversales , Circunferencia de la Cintura , HDL-Colesterol/sangre
4.
Arch. endocrinol. metab. (Online) ; 64(2): 150-158, Mar.-Apr. 2020. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1131066

RESUMEN

ABSTRACT Objective This study was designed to investigate the role of visceral adiposity along with other clinical parameters in predicting poor coronary collateral circulation (CCC) among patients with severe obstructive coronary artery disease (CAD). Subjects and methods A total of 135 patients with severe obstructive CAD and good (n = 70) or poor (n = 65) CCC were included. Data on angiographically detected CCC, the quality criteria for CCC (Rentrop scores) and visceral fat index (VFI) obtained via bioelectrical impedance were compared between good and poor CCC groups. Independent predictors of poor CCC, the correlation between VFI and Rentrop score and the role of VFI in the identification of CCC were analyzed. Results A significant negative correlation was noted between VFI and Rentrop scores (r = -0.668, < 0.001). The presence of hypertension (OR 4.244, 95% CI 1.184 to 15.211, p = 0.026) and higher VFI (OR 1.955, 95% CI 1.342 to 2.848, p < 0.001) were shown to be independent predictors of an increased risk for poor CCC. ROC analysis revealed a VFI > 9 (AUC [area under the curve] (95% CI): 0.898 (0.834-0.943), p < 0.0001) to be a potential predictor of poor CCC with a sensitivity of 95.38% and specificity of 85.71%. Conclusion In conclusion, our findings revealed comorbid hypertension and higher VFI to significantly predict the risk of poor CCC in patients with severe obstructive CAD.


Asunto(s)
Humanos , Masculino , Femenino , Anciano , Enfermedad de la Arteria Coronaria/fisiopatología , Circulación Colateral/fisiología , Circulación Coronaria/fisiología , Grasa Intraabdominal/fisiopatología , Índice de Severidad de la Enfermedad , Enfermedad de la Arteria Coronaria/diagnóstico por imagen , Valor Predictivo de las Pruebas , Curva ROC , Angiografía Coronaria , Persona de Mediana Edad
5.
Rev. Assoc. Med. Bras. (1992) ; 63(2): 156-163, Feb. 2017. tab, graf
Artículo en Inglés | LILACS | ID: biblio-842534

RESUMEN

Summary Introduction: The accumulation of visceral fat in obesity is associated with excessive production of proinflammatory adipokines, which contributes to low-grade chronic inflammation state. Moreover, the literature has shown that mineral deficiency, in particular of magnesium, has important role in the pathogenesis of this metabolic disorder with relevant clinical repercussions. Objective: To bring updated information about the participation of hypomagnesemia in the manifestation of low-grade chronic inflammation in obese individuals. Method: Articles published in PubMed, SciELO, LILACS and ScienceDirect, using the following keywords: "obesity," "magnesium" and "low grade inflammation." Results: Scientific evidence suggests that magnesium deficiency favors the manifestation of low-grade chronic inflammation in obese subjects. Conclusion: From literature data, it is evident the participation of magnesium through biochemical and metabolic reactions in protecting against this metabolic disorder present in obesity.


Resumo Introdução: O acúmulo de gordura visceral na obesidade está associado à produção excessiva de adipocinas pró-inflamatórias, o que contribui para o estado de inflamação crônica de baixo grau. A literatura também tem mostrado que a deficiência de minerais, em particular do magnésio, possui papel importante na patogênese desse distúrbio metabólico com repercussões clínicas relevantes. Objetivo: Trazer informações atualizadas sobre a participação da hipomagnesemia na inflamação crônica de baixo grau em indivíduos obesos. Método: Bases de dados Pubmed, SciELO, Lilacs e ScienceDirect, utilizando as palavras-chave: "obesity", "magnesium" e "low grade inflammation". Resultados: As evidências científicas sugerem que a deficiência de magnésio favorece a manifestação da inflamação crônica de baixo grau em indivíduos obesos. Conclusão: É evidente a participação do magnésio, por meio de reações bioquímicas e metabólicas, na proteção contra esse distúrbio metabólico presente na obesidade.


Asunto(s)
Humanos , Masculino , Síndrome Metabólico/etiología , Grasa Intraabdominal/metabolismo , Inflamación/etiología , Deficiencia de Magnesio/complicaciones , Obesidad/complicaciones , Grasa Intraabdominal/fisiopatología , Adipoquinas/metabolismo , Magnesio/administración & dosificación , Deficiencia de Magnesio/fisiopatología , Obesidad/fisiopatología
6.
The Korean Journal of Internal Medicine ; : 846-855, 2015.
Artículo en Inglés | WPRIM | ID: wpr-195234

RESUMEN

BACKGROUND/AIMS: Obstructive sleep apnea (OSA) is associated with an increased risk of obesity and non-alcoholic fatty liver disease (NAFLD), but it remains unclear whether the risk of NAFLD is independently related to OSA regardless of visceral obesity. Thus, the aim of the present study was to examine whether OSA alone or in combination with excessive daytime sleepiness (EDS) or short sleep duration was associated with NAFLD independent of visceral fat in Korean adults. METHODS: A total of 621 participants were selected from the Korean Genome and Epidemiology Study (KoGES). The abdominal visceral fat area (VFA) and hepatic fat components of the participants were assessed using computed tomography scans and they were then categorized into four groups depending on the presence of OSA and EDS. RESULTS: The proportions of NAFLD were 21.1%, 18.5%, 32.4%, and 46.7% in participants without OSA/EDS, with only EDS, with only OSA, and with both OSA and EDS, respectively. A combination of OSA and EDS increased the odds ratio (OR) for developing NAFLD (OR, 2.75; 95% confidence interval [CI], 1.21 to 6.28) compared to those without OSA/EDS, and this association remained significant (OR, 2.38; 95% CI, 1.01 to 5.59) even after adjusting for VFA. In short sleepers (< 5 hours) with OSA, the adjusted OR for NAFLD was 2.50 (95% CI, 1.08 to 5.75) compared to those sleeping longer than 5 hours without OSA. CONCLUSIONS: In the present study, OSA was closely associated with NAFLD in Korean adults. This association was particularly strong in those with EDS or short sleep duration regardless of VFA.


Asunto(s)
Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adiposidad , Pueblo Asiatico , Distribución de Chi-Cuadrado , Trastornos de Somnolencia Excesiva/diagnóstico , Grasa Intraabdominal/fisiopatología , Modelos Logísticos , Análisis Multivariante , Enfermedad del Hígado Graso no Alcohólico/diagnóstico , Obesidad Abdominal/diagnóstico , Oportunidad Relativa , República de Corea/epidemiología , Factores de Riesgo , Sueño , Apnea Obstructiva del Sueño/diagnóstico
7.
Arq. gastroenterol ; 51(2): 118-122, Apr-Jun/2014. tab, graf
Artículo en Inglés | LILACS | ID: lil-713583

RESUMEN

Context The mesenteric fat is drained by the portal system, being related to the metabolic syndrome which is an impor­tant risk factor for non-alcoholic fatty liver disease (NAFLD). Objectives Graduate of visceral fat thickness and correlate with the NAFLD degree through ultrasonography method. Methods We studied 352 subjects for age, gender, measures of subcutaneous fat thickness and visceral fat thickness as well as the presence and degree of liver fatty. Was analyzed the independent relationship between visceral fat thickness and NAFLD, and linear regression analysis was used in order to predict the visceral fat thickness from subcutaneous fat thickness. Results The mean age of 225 women (63.9%) and 127 men (36.1%) was 47.5 ± 14.0 (18-77) years, 255 subjects had normal examinations, 97 had NAFLD thus distributed, 37 grade 1, 32 grade 2, and 28 grade 3. The subcutaneous fat thickness ranged from 0.26 to 3.50 cm with a mean of 1.3 ± 0.6 cm and visceral fat thickness ranged from 0.83 to 8.86 cm with a mean of 3.6 ± 1.7 cm. Linear regression showed that for every increase of 1 cm in subcutaneous fat thickness the visceral fat thickness will increase 0.9 cm. Conclusions The visceral fat thickness measured by ultrasonography is a useful and seems to be able to help estimate the risk of NAFLD. .


Contexto A gordura mesentérica é drenada pelo sistema venoso portal, estando relacionada à síndrome metabólica, que é um importante fator de risco para doença de infiltração gordurosa do fígado. Objetivos Graduar a espessura do tecido adiposo visceral e correlacionar com o grau de doença de infiltração gordurosa do fígado através do exame ultrassonográfico. Métodos Foram estudados 352 indivíduos, avaliando-se idade, gênero, medidas da espessura da gordura subcutânea e tecido adiposo visceral, a presença e o grau de doença de infiltração gordurosa do fígado. Foi analisada a relação independente entre tecido adiposo visceral e doença de infiltração gordurosa do fígado, e a regressão linear foi utilizada para prever a tecido adiposo visceral pela espessura da gordura subcutânea. Resultados A idade média de 225 (63,9%) mulheres e 127 (36,1%) homens foi 47,5 ± 14,0 (18-77) anos, 255 indivíduos apresentaram exames normais, 97 apresentaram doença de infiltração gordurosa do fígado assim distribuídos: 37 grau 1, 32 grau 2 e 28 grau 3. A espessura da gordura subcutânea variou de 0,26 e 3,50 cm, com uma média de 1,3 ± 0,6 cm e a tecido adiposo visceral variou de 0,83 a 8,86 cm, com uma média de 3,6 ± 1,7 cm. A regressão linear demonstrou que para cada aumento de 1 cm da espessura da gordura subcutânea o tecido adiposo visceral aumentará 0,9 cm. Conclusão O tecido adiposo visceral medido por ultrassonografia é um instrumento útil e parece ser capaz de estimar o risco de doença de infiltração gordurosa do fígado. .


Asunto(s)
Adolescente , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Grasa Intraabdominal , Enfermedad del Hígado Graso no Alcohólico/fisiopatología , Índice de Masa Corporal , Grasa Intraabdominal/fisiopatología , Valor Predictivo de las Pruebas , Estudios Prospectivos , Factores de Riesgo , Índice de Severidad de la Enfermedad
8.
Braz. j. med. biol. res ; 43(5): 515-521, May 2010. ilus, tab
Artículo en Inglés | LILACS | ID: lil-546331

RESUMEN

This study evaluated the effects of chronic treadmill training on body mass gain and visceral fat accumulation in overfed rats. Overfeeding was induced by reducing the litter size to 3 male pups per mother during the suckling period. The litter size of control rats was adjusted to 10 male pups per mother. Seven weeks after birth overfed and normally fed rats were selected and assigned to a sedentary protocol or to a low-intensity treadmill training protocol (60 min, 5 times/week, for 9 weeks). Four groups (overfed sedentary, N = 23; normally fed sedentary, N = 32; overfed exercised, N = 18, and normally fed exercised, N = 18) were evaluated at 18 weeks. Data are reported as means ± SEM. Initial body weight was similar in control and overfed rats [8.0 ± 0.2 g (N = 42) vs 8.0 ± 0.1 g (N = 50); P > 0.05] and body weight gain during the suckling period was higher in the overfed rats (30.6 ± 0.9 vs 23.1 ± 0.3 g; P < 0.05). Exercise attenuated the body weight gain of overfed compared to sedentary rats (505 ± 14 vs 537 ± 12 g; P < 0.05). The sedentary overfed rats showed higher visceral fat weight compared to normally fed animals (31.22 ± 2.08 vs 21.94 ± 1.76 g; P < 0.05). Exercise reduced visceral fat by 36.5 percent in normally fed rats and by 35.7 percent in overfed rats. Exercise attenuated obesity in overfed rats and induced an important reduction of visceral fat.


Asunto(s)
Animales , Femenino , Masculino , Ratas , Grasa Intraabdominal/fisiopatología , Obesidad/fisiopatología , Condicionamiento Físico Animal/fisiología , Aumento de Peso/fisiología , Animales Recién Nacidos , Ratas Wistar
9.
Arq. bras. endocrinol. metab ; 52(1): 47-54, fev. 2008. graf, tab
Artículo en Portugués | LILACS | ID: lil-477434

RESUMEN

O objetivo do estudo foi avaliar o efeito da obesidade induzida pela administração neonatal de glutamato monossódico (MSG) sobre o peso corporal, a pressão arterial de cauda, a hemodinâmica sistêmica e a função ventricular esquerda de ratos Wistar. Dois grupos de ratos Wistar foram preparados: a)18 animais foram tornados obesos por meio da administração de 2 mg/kg/SC de MSG durante os 11 primeiros dias do período neonatal e b)16 animais controles (que receberam o veículo do MSG pelo mesmo período). Animais adultos foram acompanhados dos três aos seis meses de vida e tiveram pressão arterial e peso corporal medidos duas vezes por semana. Ao final desse período, em parte dos animais dos dois grupos, avaliou-se a função ventricular por intermédio da preparação do coração isolado de Langerdorff, e os animais restantes foram usados para o estudo da hemodinâmica sistêmica por meio de um método de termodiluição. Resultados: Nos animais MSG houve aumento da gordura epididimal relativa (WST = 2,076 ± 0,622; MSG = 2,731 ± 0,722 g/100 g), aumento significante da freqüência cardíaca (WST = 235,0 ± 35,1; MSG = 312,0 ± 90,8 bpm), da resistência periférica total (WST = 0,312 ± 0,100; MSG = 0,535 ± 0,195 mmHg.ml-1.min), e diminuição do volume sistólico (WST = 1,020 ± 0,364; MSG = 0,748 ± 0,455 µl/bat). No estudo hemodinâmico, também detectou-se nos animais obesos aumento da pressão arterial média. Os aumentos da FC e da RPT e a diminuição do VS sugerem que houve aumento da atividade simpática nos ratos normotensos com obesidade associado ao aumento da deposição de gordura visceral.


The aim of this study was to evaluate the effects of obesity induced by neonatal Monosodium Glutamate (MSG) administration upon body weight, tail blood pressure, systemic hemodynamics and left ventricular function of Wistar rats. Two groups of Wistar rats were prepared: a) 18 animals made obese through the administration of 2mg/Kg/SC of MSG during the first 11 days of the neonatal period and b)16 control animals (vehicle treated for the same period). Adults animals were followed from the 3rd up the 6th month of life with blood pressure and body weight being measured twice a week. At the end of this period, in part of animals from both groups, we evaluated the left ventricular function through the Langendorff isolated heart preparation whereas the remainders were used to evaluate the systemic hemodynamics through a termodilution method. Results: MSG animals showed significant increases in heart rate (WST = 235,0 ± 35,1; MSG = 312,0 ± 90,8 bpm), total peripheral resistance (WST = 0,312 ± 0,100; MSG = 0,535 ± 0,195 mmHg.ml-1.min) and in relative epididymal adipose tissue content (WST = 2,076 ± 0,622; MSG = 2,731 ± 0,722 g/100g) and a reduction of systolic volume (WST = 1,020 ± 0,364; MSG = 0,748 ± 0,455 ml/bat). An increase in mean arterial pressure was also detected in obese animals during the hemodynamic evaluation. The increases in HR and TPR and the reduction in SV suggest an augmentation in the sympathetic activation of those obese normotensive rats associated with an increased visceral fat deposition.


Asunto(s)
Animales , Ratas , Presión Sanguínea/fisiología , Sistemas Neurosecretores/fisiología , Obesidad/fisiopatología , Función Ventricular Izquierda/fisiología , Animales Recién Nacidos , Peso Corporal/efectos de los fármacos , Modelos Animales de Enfermedad , Aditivos Alimentarios , Hemodinámica , Grasa Intraabdominal/efectos de los fármacos , Grasa Intraabdominal/fisiopatología , Obesidad/inducido químicamente , Obesidad/metabolismo , Ratas Wistar , Glutamato de Sodio , Factores de Tiempo
10.
An. acad. bras. ciênc ; 79(4): 617-638, Dec. 2007.
Artículo en Inglés | LILACS | ID: lil-470036

RESUMEN

Obesity is traditionally linked to diabetes and cardiovascular diseases. Very recent experimental, clinical and epidemiological, sometimes provocative, data challenge this automaticity by showing that not the amount but the distribution of fat is the important determinant. Moderate abdominal fat accumulation may thus be more harmful than even consequent overweight. In view of the worldwide burden of obesity, factors leading to it in children and young adults must urgently be identified. Since obesity is a very complex cardiometabolic situation, this will require to focus investigations on uncomplicated obese subjects and adequate animal models. The recent discovery of intergenerational transmissions of obesity risk factors and also the key role played by gestational and perinatal events (epigenetic factors) give rise to completely new concepts and research avenues. Considering the potential close relationship between microcirculation and tissue metabolism, demonstrations of structural and/or functional abnormalities in microvascular physiology very early in life of subjects at risk for obesity might provide a solid basis for further investigations of such links. Microcirculation(arterioles, capillaries and venules) is conceivably a key compartment determining over one or several decades the translation of genetic and epigenetic factors into fat accumulation. Available animal models should serve to answer this cardinal question.


A obesidade é tradicionalmente associada ao diabetes e adoenças cardiovasculares. Dados muito recentes, algumasvezes provocativos, experimentais, clínicos e epidemiológicos questionam essa associação automática mostrando que não é a quantidade, mas a distribuição de gordura que é o determinante importante. O acúmulo moderado de gordura abdominal pode ser mais danoso que o conseqüente sobrepeso. Tendo em vista o aumento mundial da obesidade, fatores que levam a isso em crianças e adultos jovens devem ser urgentemente identificados. Como a obesidade é uma situação cardiometabólica muito complexa, essa identificação deve ser feita em obesos não-complicados e em modelos animais adequados. A recente descoberta da transmissão inter-geração de fatores de risco da obesidade e também do papel fundamental da gestação e de eventos perinatais (fatores epi-genéticos) dão origem a conceitos e linhas de pesquisa completamente novos. Considerando a estreita relação potencial entre a microcirculação e o metabolismo tecidual, demonstrações de anormalidades estruturais e/ou funcionais na fisiologia microvascular muito cedo na vida de pessoas com risco para obesidade podem fornecer uma base sólida para investigações futuras dessas ligações. A microcirculação (arteríolas, capilares e vênulas) é conceitualmente um compartimento chave na determinação em uma ou várias décadas dos fatores genéticos e epi-genéticos em acúmulo de gordura. Os modelos experimentais disponíveis devem servir para responder essa questão extremamente relevante.


Asunto(s)
Animales , Humanos , Grasa Intraabdominal/fisiopatología , Microcirculación/fisiopatología , Obesidad/fisiopatología , Enfermedades Cardiovasculares/etiología , Diabetes Mellitus/etiología , Endotelio Vascular/fisiopatología , Grasa Intraabdominal/metabolismo , Microcirculación/metabolismo , Obesidad/genética , Obesidad/metabolismo , Factores de Riesgo , Vasoconstricción , Vasodilatación
11.
Arq. bras. cardiol ; 89(2): 86-92, ago. 2007. graf, tab
Artículo en Portugués | LILACS | ID: lil-460771

RESUMEN

OBJETIVO: Avaliar a relação da obesidade central, hiperinsulinemia e hipertensão arterial (HA) com a massa e a geometria do ventrículo esquerdo em mulheres. MÉTODOS: Foram avaliadas 70 mulheres (35 a 68 anos), divididas em quatro grupos de acordo com a presença de obesidade central e hipertensão arterial. Determinou-se a área de gordura visceral. A glicose e insulina plasmáticas foram determinadas antes e 2 h após uma sobrecarga oral de 75 g de glicose. Realizada avaliação cardiológica. RESULTADOS: Comparado ao grupo NT-OB, o grupo HT-OB apresentou insulinemia mais elevada no TOTG de 2 h (127,5 ± 73,0 vs 86,8 ± 42,7 æU/ml; p = 0,05) e menor relação onda E/A (0,8 ± 0,1 vs 1.2 ± 0,3; p < 0,05). Comparado ao grupo NT-NO, o grupo HT-NO apresentou insulinemia elevada antes da sobrecarga de glicose (7,46 ± 3,1 vs 4,32 ± 2,1 æU/ml; p < 0,05), maior índice HOMA-r (1,59 ± 0,72 vs 0,93 ± 0,48 mmol.mU/l²; p = 0,006), maior leptinemia (19,1 ± 9,6 vs 7,4 ± 3,5 ng/ml; p = 0,028), maior área de GV (84,40 ± 55,7 vs 37,50 ± 23,0 cm²; p = 0,036), maior EDSIV (9,6 ± 1,2 vs 8,2 ± 1,7 mm; p < 0,05) e maior MVE/alt (95,8 ± 22,3 vs 78,4 ± 15,5 g/m; p < 0.05). Uma análise de regressão linear múltipla revelou impacto da idade, IMC e glicemia de jejum sobre MVE/altura (R² = 0,59; p<0,05). CONCLUSÃO: Nossos resultados indicam uma associação entre HA, obesidade central e hipertrofia ventricular esquerda, resultante de ativação simpática e resistência à insulina.


OBJECTIVE: To evaluate the relationship between central obesity, hyperinsulinemia and arterial hypertension with left ventricular mass and geometry in women. METHODS: This study included 70 women (35-68 years), divided into four groups according to the presence of central obesity and hypertension. Visceral fat area was determined. Blood glucose and plasma insulin were determined before and two hours after an oral 75g glucose load and the patients were submitted to cardilogical evaluation. RESULTS: Compared to NT-OB, HT-OB presented higher levels of plasma insulin at 2h-OGTT (127.5 ± 73.0 vs 86.8 ± 42.7 æU/ml; p = 0.05), and reduced E wave/A wave ratio (E/A) (0.8 ± 0.1 vs 1.2 ± 0.3; p < 0.05). Compared to NT-NO, HT-NO showed higher insulin levels before glucose load (7.46 ± 3.1 vs 4.32 ± 2.1 muU/ml; p < 0.05), higher HOMAr (1.59 ± 0.72 vs 0.93 ± 0.48 mmol.mU/l²; p = 0.006), higher leptin level (19.1 ± 9.6 vs 7.4 ± 3.5 ng/ml; p = 0.028), greater VF area (84.40 ± 55.7 vs 37.50 ± 23.0 cm²; p = 0.036), increased IVSTd (9.6 ± 1.2 vs 8.2 ± 1.7 mm; p <0.05) and (LVM/height) (95.8 ± 22.3 vs 78.4 ± 15.5 g/m; p < 0.05). Multiple linear regression analysis showed age, BMI and fasting glucose as determinants on LVM/height (R² = 0.59; p < 0.05). CONCLUSION: Our results indicate an association among hypertension, central obesity and left ventricular hypertrophy through increases in sympathetic activity and insulin resistance.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Persona de Mediana Edad , Hipertensión/fisiopatología , Hipertrofia Ventricular Izquierda/fisiopatología , Resistencia a la Insulina/fisiología , Grasa Intraabdominal/fisiopatología , Obesidad/fisiopatología , Factores de Edad , Índice de Masa Corporal , Glucemia/análisis , Métodos Epidemiológicos , Prueba de Tolerancia a la Glucosa , Frecuencia Cardíaca/fisiología , Hipertensión/sangre , Hipertensión/complicaciones , Hipertrofia Ventricular Izquierda/etiología , Hipertrofia Ventricular Izquierda , Insulina/sangre , Obesidad/sangre , Obesidad/complicaciones , Valores de Referencia , Disfunción Ventricular Izquierda/etiología , Disfunción Ventricular Izquierda/fisiopatología , Disfunción Ventricular Izquierda
12.
Acta Med Indones ; 2006 Jul-Sep; 38(3): 135-41
Artículo en Inglés | IMSEAR | ID: sea-46958

RESUMEN

AIM: This study was aimed to measure left ventricular mass, which partly determines the function of the left ventricle, in obese women. METHODS: The total number of study subjects was 90, which consisted of 45 obese women (BMI >or= 25 Kg/m2) and 45 non-obese women (BMI < 25 Kg/m2) as control group. They were evaluated by M mode echocardiography and abdominal CT to measure visceral fat, blood pressure, insulin resistance and waist circumference. Correlation was assessed for both groups. RESULTS: There were significant differences in the left ventricular mass of the obese and non-obese group (P= 0.000), systolic blood pressure (P = 0.000), diastolic blood pressure (P = 0.006), waist circumference (P = 0.000), visceral fat (P = 0.000), and HOMA-IR (P = 0.000). With bivariant analysis, it is concluded that there are significant correlations between left ventricular mass and visceral fat (r = 0.67, P = 0.000); between BMI and left ventricular mass (r = 0.67, P = 0.000); between waist circumference and left ventricular mass (r = 0.72, P = 0.000); and also between HOMA-IR and left ventricular mass (r = 0.57, P = 0.000). CONCLUSION: There are significant correlations between increased left ventricular mass and visceral fat, BMI, waist circumference and HOMA-IR among Indonesian women. So far, this study has shown a correlation between obesity and high cardiovascular risk.


Asunto(s)
Adulto , Índice de Masa Corporal , Estudios Transversales , Femenino , Ventrículos Cardíacos/fisiopatología , Humanos , Hipertrofia Ventricular Izquierda , Resistencia a la Insulina/fisiología , Grasa Intraabdominal/fisiopatología , Persona de Mediana Edad , Obesidad/fisiopatología , Riesgo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA