Influencia da atividade fisica na função cardiaca de ratos hipertensos pela inibição da sintese de oxido nitrico
AUTOR(ES)
Rogerio Brandão Wichi
DATA DE PUBLICAÇÃO
2001
RESUMO
Chronic nitric oxide inhibition by L-NAME treatment leads to hypertension. Regular exercise has been used as a nonpharmacological approach to prevent or to treat hypertension. The aim of this study was to investigate the effect of physical preconditioning and or physical activity simultaneously to LNAME treatment by swim training on the blood pressure, cardiomyocyte size, amount of connective tissue in the heart and chronotropic responses from right atria in L-NAME-treated rats. Our study shows that physical preconditioning by swim training attenuates the increase in blood pressure in L-NAME treated rats. However, physical activity simultaneously to L-NAME treatment does not attenuate the rise of blood pressure induced by long-term treatment with L-NAME The potency of isoproterenol was not altered in alI studied groups while the potency of carbachol was significantly lower in trained groups. Swim training by itself increased the amount of connective tissues in right atria and ventric1es and it was not modified by L-NAME treatment. No changes were observed in cardiomyocytes size in trained groups. It is concluded that preconditioning physical can prevent or attenuate the hypertension induced by L-NAME treatment, but it can not improve the blood pressure values when hypertension is establishing or is already established
ASSUNTO(S)
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=vtls000218770Documentos Relacionados
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