Análise da variabilidade da frequência cardíaca em diferentes estímulos de treinamento em indivíduo com síncope vasovagal: estudo de caso

Abstract

The present study, characterized as a case study, aimed to show the simpatovagal behavior resulting from different stimuli of physical exercises, in an individual diagnosed with vasovagal syncope. Thus, the research was performed with a 52- year-old male, diagnosed with vasovagal syncope vasodepressor type. This individual during 8 encounters was submitted to different physical exercise stimuli and monitored by means of heart rate variability. The results to the respiratory exercise stimulus indicate a decrease of the RR Mean and activation of the identified parasympathetic system by means of the decrease of the LF / HF index, suggesting a greater nerve performance. The elongation generated similar responses to that of healthy individuals. corresponding to the RMSSD. The stimulus applied on the bicycle generated a high level of stress and the RR, RMSSD and SDNN averages presented the lowest results when compared to the other stimuli applied. The pre and post hipopressive abdominal exercise values showed a considerable increase in all indices. In addition, when compared to the other stimuli, the SDNN, RMSSD, pNN50, LF / HF indices were higher. In conclusion, it was verified that the parameters at rest of the heart rate variability had, in the majority, results in concordance with healthy individuals of the same age group, where it is demonstrated the viability of the use of the HRV in individuals with this particularity. Thus, the greatest contribution of this study, both for the study participant and for the team, was the perception that after collection and analysis of data and results, the evidence suggests that the individual's sympathovagal balance may be under adverse effects of the medication Combodart®.