Audiology - Communication Research
https://www.audiolcommres.org.br/article/doi/10.1590/2317-6431-2023-2867en
Audiology - Communication Research
Original Article

Análise da variabilidade da frequência cardíaca para identificar a perda auditiva no primeiro ano de vida

 Analysis of heart rate variability to identify hearing loss in the first year of life

Bárbara Cristiane Sordi Silva; Lilian Cássia Bórnia Jacob; Vitor Engrácia Valenti; Eliene Silva Araújo; Kátia de Freitas Alvarenga

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Resumo

Objetivo: investigar a existência de associação entre a Variabilidade da Frequência Cardíaca (VFC) e a sensibilidade auditiva em crianças saudáveis no primeiro ano de vida, por meio dos índices RMSSD (Raiz Quadrada Média das Diferenças Sucessivas) e SD1 (Desvio padrão perpendicular à linha de identidade do gráfico de Poincaré).

Métodos: trata-se de um estudo metodológico, com a avaliação de 20 crianças, divididas em dois grupos: 10 crianças sem perda auditiva (G1) e 10 crianças com perda auditiva, independentemente do tipo e/ou do grau (G2). O estímulo clique foi apresentado nas intensidades de 30-60 dB nNA. Para a captação da VFC utilizou-se o monitor cardíaco Polar RS800CX, com taxa amostral de 1.000 Hz. Foram selecionadas séries estáveis com 60 intervalos R-R e apenas àquelas com mais de 95% de batimentos sinusais foram incluídas. A análise de variância ANOVA 2 critérios de medidas repetidas foi utilizada para avaliar os efeitos da estimulação acústica nos índices RMSSD e SD1, no silêncio e na presença do estímulo clique, nos grupos G1 e G2. A análise fatorial foi aplicada para avaliar os índices com os fatores sexo, orelha testada, estado comportamental da criança e período do teste.

Resultados: não houve diferenças estatisticamente significantes para os índices RMSSD e SD1, no silêncio e na presença do estímulo clique, nos grupos G1 e G2, e entre ambos. Não houve interação entre os índices da VCF e todos os fatores de confusão analisados.

Conclusão: a associação entre a VFC e a sensibilidade auditiva pode não ser aplicável para identificar crianças com perda auditiva no primeiro ano de vida, por meio dos índices RMSSD e SD1, utilizando-se o estímulo clique nas intensidades de 30-60 dB nNA.

Palavras-chave

Sistema nervoso autônomo; Estimulação acústica; Audição; Perda auditiva; Criança

Abstract

Purpose: to investigate the existence of an association between Heart Rate Variability (HRV) and hearing sensitivity in healthy children in the first year of life, using the RMSSD (Root Mean Square of Successive Differences) and SD1 (Poincaré plot standard deviation perpendicular to the line of identity) indices.

Methods: this is a methodological study with evaluation of 20 children divided into two groups: 10 children without hearing loss (G1) and 10 children with hearing loss, regardless of type and/or degree (G2). The click stimulus was presented at intensities of 30-60 dB nHL. To capture the HRV, a Polar RS800CX heart monitor was used, with a sample rate of 1.000 Hz. Stable sets with 60 R-R intervals were selected and only those with more than 95% sinus beats were included. The analysis of the 2-way repeated measures ANOVA test was used to evaluate the effects of acoustic stimulation on the RMSSD and SD1 indices, in silence and in the presence of the click stimulus, in groups G1 and G2. The factor analysis was applied to evaluate the indices with the factors sex, tested ear, behavioral state of the child and test period.

Results: there were no significant differences for the RMSSD and SD1 indices, in silence and in the presence of the click stimulus, in groups G1 and G2, and between both groups. There was no interaction between the HRV indices, and all the analyzed confounders.

Conclusion: there was no association between HRV and hearing sensitivity, so the HRV researched with click stimulus at intensities of 30-60 dB nHL was not effective to identify children with hearing loss in the first year of life, through the RMSSD and SD1 indices.

Keywords

Autonomic nervous system; Acoustic stimulation; Hearing; Hearing loss; Child

References

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Submitted date:
10/30/2023

Accepted date:
05/01/2024

69979c1da953956ba83a9194 acr Articles
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