Baroreflex Sensitivity
Mostrando 13-24 de 70 artigos, teses e dissertações.
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13. Influência da integridade dos barorreceptores nos ajustes morfofuncionais cardíacos à hipertensão espontânea em ratos / Influence of baroreceptor integrity on cardiac morpho-functional adjustments to spontaneous hypertension in rats
It has been demonstrated that reduced baroreflex sensitivity is an independent marker of mortality risk. The arterial baroreflex plays an important role in the maintenance of the moment-to-moment stability of blood pressure (BP). Although the contribution of blood pressure variability (BPV) to cardiovascular morbidity and mortality is well established, the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2011
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14. Efeitos do exercício físico prévio sobre a função renal, disfunção autonômica e atividade nervosa simpática renal no diabetes mellitus experimental, em ratos / Effects of previous exercise on renal function, autonomic dysfunction and renal sympathetic nerve activity in experimental diabetes, in rats
Background: The exercise training (ET) has been recognized as an important therapeutic intervention for the chronic degenerative diseases such as Diabetes Mellitus (DM) that cause renal and cardiovascular complications. However, little is known if previous ET intervention modulates the physiological and medical impact caused by these dysfunctions. We investi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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15. Efeito do Óxido Nítrico na Regulação de Parâmetros Cardiovasculares pela CVLM em Ratos com Hipertensão Renovascular 2R1C / Efeito do Óxido Nítrico na Regulação de Parâmetros Cardiovasculares pela CVLM em Ratos com Hipertensão Renovascular 2R1C
Hypertension may occur due to hyperactivity of neurons in the rostral ventrolateral medulla (RVLM) (Chan et al. 1991; Boone and McMillen, 1994, Suzuki et al. 1994; Minson et al., 1996) and/or due to a reduced tone of GABAergic neurons of the caudal ventrolateral medulla (CVLM) that projects to the RVLM. Furthermore, during hypertension occurs an elevation of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2010
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16. Strain differences in baroceptor reflex in adult Wistar Kyoto rats
OBJECTIVES: A subset of normotensive Sprague-Dawley rats show lower baroreflex sensitivity; however, no previous study investigated whether there are differences in baroreflex sensitivity within this subset. Our study compared baroreflex sensitivity among conscious rats of this specific subtype. METHODS: Male Wistar Kyoto (WKY) rats (16 weeks old) were studi
Clinics. Publicado em: 2010
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17. Effects of aerobic exercise training on cardiac hemodynamic, autonomic and morphofunctional adaptations in spontaneously hypertensive rats: role of baroreflex / Efeitos do treinamento físico aeróbio nas adaptações hemodinâmicas, autonômicas e morfofuncionais cardíacas da hipertensão espontânea: influência do barorreflexo
Baroreceptors regulate moment-to-moment changes in blood pressure (BP) and respond for the adequate modulation of autonomic nervous system in physiological situations. In arterial hypertension, there is autonomic function impairment with descreased baroreflex sensitivity and sympathetic activity predominance, besides the progressive cardiac morphofunctional
Publicado em: 2010
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18. Renin angiotensin system and cardiac hypertrophy after sinoaortic denervation in rats
OBJECTIVE: The aim of this study was to evaluate the role of angiotensin I, II and 1-7 on left ventricular hypertrophy of Wistar and spontaneously hypertensive rats submitted to sinoaortic denervation. METHODS: Ten weeks after sinoaortic denervation, hemodynamic and morphofunctional parameters were analyzed, and the left ventricle was dissected for biochemic
Clinics. Publicado em: 2010
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19. TREINAMENTO FÍSICO RESISTIDO PREVINE HIPERTENSÃO ARTERIAL E MELHORA MODULAÇÃO AUTONÔMICA CARDÍACA EM RATOS DIABÉTICOS INDUZIDOS PELA ALOXANA. / RESISTANCE TRAINING PREVENTS HYPERTENSION AND IMPROVES CARDIAC AUTONOMIC MODULATION IN ALLOXAN DIABETIC RATS.
O objetivo desse estudo foi avaliar os efeitos do treinamento físico resistido sobre a pressão arterial, repolarização ventricular, sensibilidade barorreflexa e balanço autonômico cardíaco em ratos diabéticos. A avaliação cardiovascular foi realizada em animais conscientes treinados e sedentários, após 8 semanas do início do diabetes com aloxana
Publicado em: 2010
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20. Avaliação da função autonômica em portadores de cardiomiopatia hipertrófica com e sem síncope / Assessment of autonomic nervous function in patients with hypertrophic cardiomyopathy with and without syncope
BACKGROUND: Unexplained syncope is considered a risk factor for sudden death in hypertrophic cardiomyopathy (HCM). Several mechanisms are involved in its pathogenesis, including the difficulty in adaptation of the systemic vascular resistance to exertion and to orthostatic stress, which may be influenced by a dysfunction of the autonomic nervous system. The
Publicado em: 2010
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21. Efeitos da obesidade no sistema calicreína-cininas: estudo dos receptores b1 e b2 de cininas em tecido adiposo humano e murino. / Obesity, Leptin and Renin-Angiotensin System: Role on blood pressure control and autonomic regulation in ob/ob and db/db mice.
The leptin deficient ob/ob mice are insulin resistant and obese. However, the control of blood pressure in this model is not well defined. The goal of this study was to evaluate the role of leptin and the renin-angiotensin system (RAS) in the cardiovascular abnormalities observed in obesity using a model lacking leptin. Leptin is a hormone related to metabol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2009
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22. Tonic and reflex cardiovascular autonomic control in trained-female rats
The effects of exercise training on cardiovascular and autonomic functions were investigated in female rats. After an aerobic exercise training period (treadmill: 5 days/week for 8 weeks), conscious female Wistar (2 to 3 months) sedentary (S, N = 7) or trained rats (T, N = 7) were cannulated for direct arterial pressure (AP) recording in the non-ovulatory ph
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-10
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23. Acute and chronic electrical activation of baroreceptor afferents in awake and anesthetized subjects
Electrical stimulation of baroreceptor afferents was used in the 1960's in several species, including human beings, for the treatment of refractory hypertension. This approach bypasses the site of baroreceptor mechanosensory transduction. Chronic electrical stimulation of arterial baroreceptors, particularly of the carotid sinus nerve (Hering's nerve), was p
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-01
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24. Efeitos hemodinâmicos e metabólicos do destreinamento no diabetes experimental / Hemodynamic and metabolic effects of detraining in experimental diabetes
Indivíduos diabéticos estão sujeitos a maior mortalidade cardiovascular relacionadas à disfunção autonômica e à neuropatia. Por outro lado o exercício físico é uma ferramenta importante no tratamento do diabetes, melhorando a função autonômica, melhorando a sensibilidade baroreflexa e quimioreflexa além de melhorar a freqüência cardíaca int
Publicado em: 2008