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- W2165992011 abstract "Although congestive heart failure subsequent to myocardial infarction is known to be associated with increased sympathetic activity, very little information regarding changes in the sympathetic nerves in the left and right ventricles at various stages after infarction is available. Male Sprague-Dawley rats were subjected to coronary artery ligation and studied 4 and 8 weeks later; these animals had mild and moderate stages of congestive heart failure. A sham group, without coronary ligation, was used as control. Four weeks after myocardial infarction, plasma and ventricular (left and right) epinephrine (EPI), unlike norepinephrine (NE), were markedly increased. Whereas plasma catecholamine (EPI and NE) levels were increased 8 weeks after infarction, NE concentration in the left ventricle was unchanged but EPI concentration was increased in comparison with sham control. The right ventricle showed an increased level of both NE and EPI 8 weeks after infarction. Measurement of the rate of change in the specific activity of NE (NE turnover) in the left and right ventricles 8 weeks after infarction revealed an increase in NE turnover in the left ventricle, without any changes in the right ventricle. The concentration of EPI, unlike NE, was increased in the kidney, spleen, and brain 8 weeks after coronary occlusion. These results are interpreted to mean that congestive heart failure caused by myocardial infarction is associated with differential changes in the status of sympathetic nerves in the left and right ventricles; sympathetic activity is increased only in the left ventricle, whereas the right ventricle may play an adaptive role by increasing catecholamine stores during the development of heart failure. (Am Heart J 1997;133:340-5.)" @default.
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- W2165992011 title "Differential changes in sympathetic activity in left and right ventricles in congestive heart failure after myocardial infarction" @default.
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- W2165992011 doi "https://doi.org/10.1016/s0002-8703(97)70230-8" @default.
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