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Mostrando ítems 11-20 de 228
Infarto do miocárdio experimental em ratos: Análise do modelo
(2009-10-01)
One of the most often used strategies to study the physiopathological alterations caused by coronary occlusion is the use of the experimental infarction model in rats. Among other factors, this is due to the similarities ...
The effect of eccentric strength training on heart rate and on its variability during isometric exercise in healthy older men
(2009-01-01)
The purpose of this study was to investigate if chronic eccentric strength training (ST) affects heart rate (HR) and heart rate variability (HRV) during sub-maximal isometric voluntary contractions (SIVC). The training ...
Myostatin and follistatin expression in skeletal muscles of rats with chronic heart failure
(Wiley-Blackwell Publishing, Inc, 2010-02-01)
P>Skeletal muscle abnormalities can contribute to decreased exercise capacity in heart failure. Although muscle atrophy is a common alteration in heart failure, the mechanisms responsible for muscle mass reduction are not ...
Myosin heavy chain expression and atrophy in rat skeletal muscle during transition from cardiac hypertrophy to heart failure
(Blackwell Publishing, 2003-08-01)
The purpose of this investigation was to determine whether changes in myosin heavy chain (MHC) expression and atrophy in rat skeletal muscle are observed during transition from cardiac hypertrophy to chronic heart failure ...
Influência da pós-carga sobre a taxa de variação da tensão desenvolvida (dT/dt). Estudo em músculo cardíaco isolado.
(1995-11-01)
PURPOSE: To evaluate the effects of afterload on peak rate of tension rise (dT/dt) in the isolated muscle. METHODS: Left ventricular papillary muscles from Wistar rats were studied in isometric and isotonic afterloaded ...
Heart failure alters matrix metalloproteinase gene expression and activity in rat skeletal muscle
(Blackwell Publishing, 2006-12-01)
Heart failure is associated with a skeletal muscle myopathy with cellular and extracellular alterations. The hypothesis of this investigation is that extracellular changes may be associated with enhanced mRNA expression ...
Modificacoes na ação mecânica do coração isolado de cobaia por doses de propafenon capazes de alterar o eletrocardiograma
(1979-12-01)
Inotropic effects of Propafenon were studied in isovolumic isolated guinea pig hearts submitted to infusion of the drug during 10 minutes. The dosages utilized caused: bradycardia, depression of AV nodal conduction and QRS ...
Is coronary sinus blood oxygen tension behavior determined by myocardial oxygen tension variation during cardiac reperfusion?
(1988-01-01)
The relationship between coronary sinus blood oxygen tension (CSPO 2) and myocardial oxygen tension (MPO 2) variations during cardiac ischemia and reperfusion was studied in anesthetized open-chest dogs. Oxygen tension was ...
A comparative study of myocardial function and morphology during fasting/refeeding and food restriction in rats
(2010-09-01)
Background: This study compared the influence of fasting/refeeding cycles and food restriction on rat myocardial performance and morphology. Methods: Sixty-day-old male Wistar rats were submitted to food ad libitum (C), ...