Uma única dose de chocolate amargo aumenta a modulação parassimpática e a variabilidade da frequência cardíaca em indivíduos saudáveis
Palavras-chave:
Sistema nervoso autônomo, Cacau, FlavonoidesResumo
Objetivo
O objetivo deste estudo foi investigar o efeito agudo de uma única dose de chocolate amargo (70% cacau) sobre a pressão arterial e a variabilidade da frequência cardíaca.
Métodos
Trinta e um indivíduos saudáveis (com idade entre 18-25 anos; ambos os sexos) foram divididos em dois grupos: 10 indivíduos no grupo chocolate branco (7,4 g) e 21 no grupo chocolate amargo (10,0 g); as avaliações foram realizadas no laboratório de fisiologia da Universidade Federal de Ciências da Saúde de Porto Alegre.
Resultados
O eletrocardiograma foi realizado para analisar o balanço simpatovagal através da análise espectral e simbólica. Uma única dose de chocolate amargo reduziu significativamente a pressão arterial sistólica e a frequência cardíaca. Depois de consumir 10 g de chocolate amargo, observou-se aumento significativo na variabilidade da frequência cardíaca, o desvio padrão dos intervalos, a raiz quadrada da média do quadrado das diferenças entre os intervalos RR normais adjacentes a raiz quadrada da média da soma dos quadrados das diferenças entre os intervalos NN normais adjacentes e um aumento na componente de alta frequência em valores absolutos, o que representa a modulação parassimpática.
Conclusão
Em conclusão, a importância dos resultados aqui apresentados reside na magnitude da resposta provocada por uma dose única de cacau (10 g). Esta provocou um aumento significativo da modulação parassimpática e da variabilidade da frequência cardíaca no coração. Esses efeitos, quando combinados, podem, potencialmente, aumentar a esperança de vida, porque a redução da variabilidade da frequência cardíaca está associada a doenças cardiovasculares e maior mortalidade.
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Copyright (c) 2023 Ana Amélia Machado DUARTE, Cristiano MOSTARDA, Maria Claudia IRIGOYEN, Katya RIGATTO
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
