136 resultados para High blood pressure


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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

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Hypertension is a disease that affects a large part of the world population, in which the treatment consists in changing habits of life, which include diet, weight loss and smoking cessation, among others, attending the physical activity outstanding recommendations, supported by its positive effects on the maintenance of blood pressure levels within the limits of normality. Objective: To characterize the post-exercise hypotensive response on individuals with hypertension. Method: Literature review from 1990 to 2011, searching the electronic databases MEDLINE, ScIELO, Lilacs and Cochrane. Articles were selected using keywords hypertension, physical exercise and high blood pressure. Results: One session of physical activity promotes the reduction of arterial hypertension, which is called post-exercise hypotension. However, this phenomenon will depend on some related factors such as the type, intensity and duration of exercise. Conclusion: The performance of activity and/or physical exercise is important in non-pharmacological treatment for lowering blood pressure, but is not yet defined the best type of exercise.

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Adopting a healthy lifestyle it is critical for the prevention of high blood pressure and is an indispensable part of the treatment of those with hypertension. High levels of physical activity and greater fitness are associated with reduced incidence of hypertension. However until the beginning of the 1990 decade, the resisted exercise was not inclued at the internacionals statements for people with heart disease. Fortunately, in the past few years, this type of exercise started to take into account as a possible strategy for the first and second prevention of diferents cardiovascular diseases. The aim of this study it is to evaluate, through a systematic review, the contribution of the resisted exercise on the cardiovascular responses in hypertensive male adults. Twenty eight articles were pre-selected for this study, four attend to the requirements. The results were not consistent in this review, only the diastolic blood pressure demonstrated decrease in three of the four studies, in circuit protocol as much as in the conventional protocol. Otherwise one study proved an increase in the VO2max, wich is an important data, because it is an anaerobic exercise and, an improve was not expected. An other article analised the harm issues of the Valsalva manouvre, where it was presented the maximum blood pressure values (345/245 mmHg) and evidences of lower blood pressure rises in the intra-arterial, intrathoracic and intra-abdominal pressures when the exercise was performed without the manouvre, enhancing the necessity to avoid the use of this manouvre in hypertensive individuals.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Dexamethasone is a synthetic glucocorticoid widely used to treat allergic and inflammatory processes. This drug is used in three main situations, are used to contain acute or chronic inflammatory processes, or like immunosuppressive drug's. In these cases the patient will receive high doses for a chronic period and, therefore, has a much greater chance of adverse side effects, such as hypertension, diabetes and dyslipidemia. Dexamethasone promotes deleterious effects on the arachidonic acid pathway, when administered in high doses, because it is a potent anti-inflammatory drug. We recently demonstrated that dexamethasone significantly reduces the protein expression of vascular endothelial growth factor (VEGF) in both skeletal muscle and heart, but the mechanisms involved remain unclear. Meanwhile, exercise has been shown to be effective against high blood pressure, diabetes and dyslipidemia, promoting, among other factors, the increase in VEGF and angiogenesis. One possible explanation for these effects would be the creation of new vessels mediated by inflammation, or by the stimulation of the formation of products of the metabolism of arachidonic acid (AA), such as prostaglandin E2 (PGE2) and VEGF, by increasing the stimulation of the enzymes cyclooxygenase 1 and 2 (COX-1 and COX-2). Little is known about the preventive effects of training on the action of dexamethasone in the arachidonic acid pathway. Therefore, the aim of this study was to determine whether aerobic exercise training, performed before and concomitant treatment with dexamethasone, was able to prevent the effects of the dexamethasone in the protein expression of COX-2 and VEGF. For this, we used young Wistar rats (n = 40) which were randomly divided into 4 groups: sedentary control (SC), sedentary and treated with dexamethasone (SD), trained control (TC) and trained and treated with dexamethasone (TD). These rats performed aerobic exercise training, 60% of maximum capacity, 5

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Nitric oxide (NO) is a free radical gas, inorganic, which has seven electrons of nitrogen and oxygen eight, possessing an unpaired electron. This radical is produced from L-arginine by a reaction mediated by the enzyme NO synthase. NO it is about a radical of who acts abundant on a variety of biological processes, particularly when produced by endothelial cells plays a significant role in cardiovascular control, as a modulator of peripheral vascular resistance and platelet aggregation. This free radical has also a neurotransmitter and mediator of the immune system. NO kidney function has been considered in many physiological functions such as: (a) regulation of hemodynamics and glomerular function tubuloglomerular, (b) participation in pressure natriuresis (c) maintaining medullar perfusion (d) inhibiting sodium reabsorption tubular, and (e) acting as a modulator of the activity of the sympathetic nervous system. Given these functions, the occurrence of its deficiency is associated with chronic kidney disease (CKD) in vasoconstriction and consequently glomerular hypertension, high blood pressure (HBP), proteinuria and progression of renal dysfunction. This work has the scope to describe the role of NO in renal physiology and pathophysiology of CKD.

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A 25-year-old hypertensive female patient was referred to our institution. Initial workup exams demonstrated a 2.8 cm cortical lower pole tumor in the right kidney. She underwent laparoscopic partial nephrectomy without complications. Histopathologic examination revealed a rare juxtaglomerular cell tumor known as reninoma. After surgery, she recovered uneventfully and all medications were withdrawn. Case hypothesis: Secondary arterial hypertension is a matter of great interest to urologists and nephrologists. Renovascular hypertension, primary hyperadosteronism and pheocromocytoma are potential diagnosis that must not be forgotten and should be excluded. Although rare, chronic pyelonephritis and renal tumors as rennin-producing tumors, nephroblastoma, hypernephroma, and renal cell carcinoma might also induce hypertension and should be in the diagnostic list of clinicians. Promising future implications: Approximately 5% of patients with high blood pressure have specific causes and medical investigation may usually identify such patients. Furthermore, these patients can be successfully treated and cured, most times by minimally invasive techniques. This interesting case might expand knowledge of physicians and aid better diagnostic care in future medical practice.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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