Impact of Air Pollutant on Heart Rate Variability in Healthy Young Adults

Autor(es)

Anita de Cássia Melinski ^[1] ; Aparecida Maria Catai ^[2] ; Sílvia Cristina Garcia de Moura ^[3] ; Juliana Cristina Milan-Mattos ^[4] ; Monica Yuri Takito ^[5]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo - Brasil

^[2] Universidade Federal de São Carlos - Brasil

^[3] Universidade Federal de São Carlos - Brasil

^[4] Universidade Estadual Paulista Júlio de Mesquita Filho - Brasil

^[5] Universidade de São Paulo - Brasil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Cardiovascular Sciences; v. 35, n. 4, p. 523-529, 2022-04-01.

Resumo

Abstract Background: Air pollution and sex independently affect cardiac autonomic control, which can be assessed by heart rate variability (HRV). The research hypothesis is that individuals exposed to low concentrations of pollution have higher cardiac autonomic modulation compared to those exposed to high concentrations and that women have better cardiac autonomic control than men. Objective: To analyze the impact of exposure to air pollutants, specifically smoke, and sex on HRV in healthy young people exposed to different concentrations of pollution over an average period of 22 years. Methods: From April to September 2011, 36 participants of both sexes (20-30 years old) were selected, grouped by levels of air pollution exposure according to indices provided by the Environmental Company of São Paulo State. The R-R intervals (R-Ri) of the electrocardiogram were captured using a heart rate monitor during supine rest. HRV was analyzed by spectral analysis and conditional entropy. The Queen's College step test was used to characterize functional capacity. A between-group comparison was performed using the two-way ANOVA statistical test (post hoc Tukey) and p<0.05. Results: Significant differences were found in mean R-Ri (p<0.01) and cardiac parasympathetic modulation between sexes in the same city (p=0.02) and between groups exposed to different air pollution concentrations (p<0.01). Conclusion: Our results suggest that long-term exposure to air pollutants, specifically smoke, has an unfavorable impact on HRV, with reduced cardiac vagal autonomic modulation in healthy young adults, especially females. (AU)

• Processo FAPESP: 11/18919-5 - O efeito da poluição e do exercício físico sobre a variabilidade da frequência cardíaca
• Beneficiário: Anita de Cássia Melinski
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica