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Age Affects Exercise-Induced Improvements in Heart Rate Response to Exercise
(2013-10-16)
The aim of the present study was to analyze the effects of age on cardiorespiratory fitness (CRF), muscle strength and heart rate (HR) response to exercise adaptation in women in response to a long-term twice-weekly combined ...
Differential morphofunctional characteristics and gene expression in fast and slow muscle of rats with monocrotaline-induced heart failure
(Springer, 2011-06-01)
Heart failure (HF) is characterized by limited exercise tolerance, skeletal muscle atrophy, a shift toward fast muscle fiber, and myogenic regulatory factor (MRF) changes. Reactive oxygen species (ROS) also contribute to ...
Morphological aspects of neuromuscular junctions and gene expression of nicotinic acetylcholine receptors (nAChRs) in skeletal muscle of rats with heart failure
(Springer, 2011-12-01)
HF is syndrome initiated by a reduction in cardiac function and it is characterized by the activation of compensatory mechanisms. Muscular fatigue and dyspnoea are the more common symptoms in HF; these may be due in part ...
Cardiac remodeling induced by smoking: Concepts, relevance, and potential mechanisms
(2012-12-04)
Cardiac or ventricular remodeling is characterized by molecular, cellular, and interstitial alterations that lead to changes in heart size, mass, geometry and function in response to a given insult. Currently, tobacco smoke ...
A practical approach to assess leg muscle oxygenation during ramp-incremental cycle ergometry in heart failure
(Assoc Bras Divulg Cientifica, 2017)
Heart failure is characterized by the inability of the cardiovascular system to maintain oxygen (O2) delivery (i.e., muscle blood
flow in non-hypoxemic patients) to meet O2 demands. The resulting increase in fractional ...
Subjective, cardiovascular and EMG spectral recovery after lumbar extension exhaustion test
(2008-09-24)
The purpose of this randomized study was to evaluate EMG spectral, subjective and cardiovascular recovery parameters after isometric lumbar extension contractions. Ten healthy women performed isometric lumbar extensions ...
Direct effects of colchicine on myocardial function - Studies in hypertrophied and failing spontaneously hypertensive rats
(Lippincott Williams & Wilkins, 1999-01-01)
The aging spontaneously hypertensive rat (SHR) is a model in which the transition from chronic stable left ventricular hypertrophy to overt heart failure can be observed. Although the mechanisms for impaired function in ...
Participação do Estado Contrátil e do Relaxamento Miocárdico na Disfunção Ventricular durante a Transição Hipertrofia-Falência Cardíaca
(1997-12-01)
Purpose - To investigate the participation of contractile state and relaxation in cardiac muscle dysfunction during the transition from stable hypertrophy to cardiac decompensation in aging spontaneously hypertensive rats ...
Food restriction-induced myocardial dysfunction demonstrated by the combination of in vivo and in vitro studies
(2002-11-01)
The aim of this study was to test the hypothesis that protein-calorie undernutrition decreases myocardial contractility jeopardizing ventricular function, and that ventricular dysfunction can be detected noninvasively. ...