Globally chaotic analysis of Heart Rate Variability during acute auditory stimulus by heavy metal music

Abstract

OBJECTIVE:Auditory stimulation with relaxing style music can improve cardiac autonomic regulation in subjects treated with a cardio-toxic medication. We assess the acute effect of heavy metal music on cardiac autonomic regulation, through novel high spectral chaotic global analysis techniques: (a) high spectral detrended fluctuation, (b) high spectral entropy (c) spectral multi-taper method. METHOD: We investigated young adult women between 18 and 30 years old exposed to heavy metal (75-84 dB) music for 20 min. Normality tests were applied: (i) Anderson-Darling, (ii) Ryan-Joiner (similar to Shapiro-Wilk); (iii) Lilliefors for low number of subjects. They all indicated a non-normal data distribution. Consequently we applied the Kruskal-Wallis non-parametric test. Also because of the small population, we used a broader than usual level of significance (critical p = 0.1). RESULTS:The application of the three tests for normality and the non-parametric test of significance by the KruskalWallis technique showed that acute musical auditory stimulation with heavy metal music lead to a significant increase (p < 0.07) in one of the seven combinations of chaotic globals. The most significant combination of chaotic globals is the Chaos Forward Parameter One (CFP1), which includes all three studied chaotic globals (high spectral detrended fluctuation, high spectral entropy, spectral multi-taper method). We found significantly increased values during musical auditory stimulation for this specific CFP1. CONLCUSION: It is suggested that acute musical stimulation with heavy metal influences cardiac autonomic regulation at a more complex level than previously reported and that this may be beneficial to heart function.

Linear and Complex Measures of Heart Rate Variability during Exposure to Traffic Noise in Healthy Women

“…A previous study reported that chaotic global analysis was unable to identify HRV changes during mental task [59]. Another research study investigated chaotic global analysis in RR intervals during exposure to heavy metal music [60]. The authors failed to reveal influences of this music style on the complexity of HRV.…”

Impacto da música na modulação autonômica em diferentes faixas etárias

“…Outro estudo avaliou o efeito de uma intervenção musical sobre a ansiedade e parâmetros vitais em 60 pacientes com idade igual ou superior a 18 anos com doença renal crônica em comparação ao cuidado de clínicas de hemodiálise, concluiu que o estímulo musical infere ter potencial de intervenção para a redução do estado de ansiedade durante sessões de hemodiálise (Melo et al, 2018). Já em outro estudo que avaliou o efeito agudo da música heavy metal na regulação autonômica cardíaca em mulheres adultas jovens entre 18 e 30 anos expostas a músicas "pesadas" (75-84 dB) por 20 min, sugeriu que a estimulação musical aguda com música "pesada" influencia a regulação autonômica cardíaca em um nível mais complexo sendo benéfico para a função cardíaca (Nogueira et al, 2015).…”

Ley exponencial de la dinámica cardiaca caótica aplicada a 18 horas

“…A partir de métodos lineales, la teoría del caos y el análisis fractal se han desarrollado nuevas metodologías para el estudio de las dinámicas fisiológicas [32][33][34][35][36][37][38] , con esto se han logrado contribuciones importantes, entre ellas, una nueva concepción de normalidad enfermedad 15 , así como mejores predictores de mortalidad, y nuevos índices para cuantificar la complejidad de las dinámicas estudiadas, sin embargo es necesario realizar más estudios para establecer su aplicabilidad clínica 39,40 .…”