Abstract:O sistema nervoso autônomo (SNA) sofre importantes adaptações ao treinamento físico aeróbico e alterações na sua função estão relacionadas à gênese e prognóstico de várias doenças. A variação da freqüência cardíaca em função da respiração constitui fenômeno natural no qual se baseia o teste da arritmia sinusal respiratória (ASR), utilizado para avaliar o funcionamento do ramo parassimpático do SNA sobre o sistema cardiovascular. Calcula-se a ASR através da razão entre o maior intervalo R-R do eletrocardiograma… Show more
“…The increase in R-R intervals and their greater irregularity suggest that there was a longer expiration time [ 45 , 46 ], which is in accordance with the respiratory data presented, due to muscle relaxation.…”
“…The increase in R-R intervals and their greater irregularity suggest that there was a longer expiration time [ 45 , 46 ], which is in accordance with the respiratory data presented, due to muscle relaxation.…”
The autonomic maneuvers, especially RSA, are useful methods to evaluate cardiac autonomic function in hemodialysis patients. The acquisition of the RSA index by independent cycles should not be used in this population.
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