Intrinsic Heart Rate
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Association of exercise training and angiotensin-converting enzyme 2 activator improves baroreflex sensitivity of spontaneously hypertensive rats
The present study sought to determine cardiovascular effects of aerobic training associated with diminazene aceturate (DIZE), an activator of the angiotensin converting enzyme 2, in spontaneously hypertensive rats (SHRs). Male SHRs (280–350 g) were either subjected to exercise training or not (sedentary group). The trained group was subjected to 8 weeks of
Braz J Med Biol Res. Publicado em: 01/08/2016
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2. Adaptações autonômicas e cardiovasculares em atletas de alto rendimento: influência da modalidade e periodização do treinamento físico / Autonomic and cardiovascular adaptations in high performance athletes: influence of sport modality and physical training periodization
INTRODUÇÃO: O treinamento físico provoca adaptações cardiovasculares, sendo que maiores adaptações estruturais cardíacas são observadas em atletas de elite, que realizam treinamento físico de alta intensidade com o objetivo de aumento no rendimento. Além disto, atletas apresentam diminuição da frequência cardíaca de repouso, embora os mecanism
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/08/2011
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3. Análise da existência de máxima fase estável de lactato nos exercícios resistidos leg press 45º e supino reto / Analysis of the existance of a maximal lactate steady state on resistance exercises leg press 45° and bench press
The purpose of the study was to verify if there is a maximal lactate steady state (MLSS) for the Leg Press (LP) and Bench Press (BP) exercises and to analyse ventilatory responses ventilation (Ve) and oxygen uptake (VO2), heart rate (HR), blood lactate concentration (BLC) and ratings of perceived exertion (RPE) to those exercises performed on MLSS intensity
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2010
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4. Effects of exercise training on autonomic and myocardial dysfunction in streptozotocin-diabetic rats
Several investigators have demonstrated that diabetes is associated with autonomic and myocardial dysfunction. Exercise training is an efficient non-pharmacological treatment for cardiac and metabolic diseases. The aim of the present study was to investigate the effects of exercise training on hemodynamic and autonomic diabetic dysfunction. After 1 week of d
Publicado em: 2010
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5. Estudo dos efeitos do fármaco propranolol para ceriodaphnia silvestrii (cladocera, crustacea) com ênfase em efeitos nas populações / STUDY OF THE EFFECTS OF THE PHARMACEUTICAL COMPOUND PROPRANOLOL TO CERIODAPHNIA SILVESTRII (CLADOCERA, CRUSTACEA) WITH EMPHASIS ON THE EFFECTS ON POPULATIONS.
The pharmaceutical products occurrence in the aquatic environment could cause adverse effects on the human health and aquatic communities. Propranolol, non selective -blocker, is widely prescribed for the treatment of heart related diseases as angina and hypertension. Simple effect measures, like LC50, dont provide information about contaminant impacts in po
Publicado em: 2008
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6. Efeito do citrato de sildenafil sobre o controle autonômico cardiovascular em ratos normotensos.
Sildenafil citrate (Viagra) is a broadly used agent to treat erectile dysfunction. Several clinical trials, however, have demonstrated that in heart diseased patients in use of organic nitrates, the association with sildenafil could significantly enhance cardiac events risk. The possible mechanisms implicated in this increased risk are not completely
Publicado em: 2007
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7. Alterações de Parâmetros Cardiovasculares e Envolvimento dos Receptores AT2 na CVLM sobre a Pressão Arterial, induzidas por Atividade Física de Baixa Intensidade em Ratos com Hipertensão Renovascular
10 Low intensity physical activity has been used as a non-pharmacological treatment for hypertension. The caudal vetrolateral medulla (CVLM) represents the major tonic inhibitory afferece to the rostral ventrolateral medulla (RVLM). Regarding hypertensive states, CVLM neurons seem to be inefficient in counteracting the increased intrinsic pressor activity of
Publicado em: 2007
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8. Efeitos da dieta bÃsica regional hiperssÃdica sobre parÃmetros hemodinÃmicos, autonÃmicos cardÃacos e bioquÃmicos em ratos em diferentes fases do desenvolvimento
The aim of this study was to investigate the effects of malnutrition on heart autonomic control, lipid and serum eletrolyte levels in male Wistar rats fed two types of diet: Standard Labina (normal sodium 0.36g%) and Regional Basic Diet high sodium (RBDh, sodium 0.95%) with a protein content of 23% and 8%, respectively. The animals were divided into three gr
Publicado em: 2006
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9. Loss of resting bradycardia with detraining is associated with intrinsic heart rate changes
The mechanisms underlying the loss of resting bradycardia with detraining were studied in rats. The relative contribution of autonomic and non-autonomic mechanisms was studied in 26 male Wistar rats (180-220 g) randomly assigned to four groups: sedentary (S, N = 6), trained (T, N = 8), detrained for 1 week (D1, N = 6), and detrained for 2 weeks (D2, N = 6).
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-07
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10. A semi-automatic computerized method to measure baroreflex-mediated heart rate responses that reduces interobserver variability
Arterial baroreflex sensitivity estimated by pharmacological impulse stimuli depends on intrinsic signal variability and usually a subjective choice of blood pressure (BP) and heart rate (HR) values. We propose a semi-automatic method to estimate cardiovascular reflex sensitivity to bolus infusions of phenylephrine and nitroprusside. Beat-to-beat BP and HR t
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-06
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11. Heart rate variability in athletes and nonathletes at rest and during head-up tilt
The purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG H
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-04
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12. Swimming training increases cardiac vagal activity and induces cardiac hypertrophy in rats
The effect of swimming training (ST) on vagal and sympathetic cardiac effects was investigated in sedentary (S, N = 12) and trained (T, N = 12) male Wistar rats (200-220 g). ST consisted of 60-min swimming sessions 5 days/week for 8 weeks, with a 5% body weight load attached to the tail. The effect of the autonomic nervous system in generating training-induc
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-12