Análise do drive respiratório neural em indivíduos hipertensos durante a ventilação máxima
Introduction: The neural respiratory drive (NRD) is a strategy for assessing respiratory muscle activity to maintain pulmonary efficiency. This has been investigated in several diseases in order to understand the repercussions they impose on breathing pattern. In hypertensive individuals, there i...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/31440 |
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| Resumo: | Introduction: The neural respiratory drive (NRD) is a strategy for assessing respiratory muscle
activity to maintain pulmonary efficiency. This has been investigated in several diseases in
order to understand the repercussions they impose on breathing pattern. In hypertensive
individuals, there is still a gap in the literature, despite the close cardiovascular and
respiratory relationship present in this dysfunction. Aims: To evaluate the NRD in
hypertensive during the maximum voluntary ventilation (MVV) and to correlate this variable
with the anthropometric data. Methods: This is a cross-sectional study with hypertensive
individuals, aged between 35 and 64 years, where anthropometric measurements were
evaluated according to the guidelines of the International Society for the Advancement of
Kinanthropometry (ISAK), the VVM collected through the spirometer and the neural
respiratory drive index (iDRN), collected through surface electromyography of the second
intercostal space (EMGpara). Correlations were assessed by Pearson and Spearman tests, and
for the NRD comparison, paired t-test was used, a significance level of 5% (p <0.05) was
adopted. Results: 17 patients were studied with a mean BMI of 27.8 (± 2.5) kg / m2, MVV (L
/ min) of 104.4 (± 24.2), iNRD at rest of 1746.88 (± 531.57) AU (arbitrary units) and iNRD in
the MVV of 13972.04 ± 3810.64 AU. Ventilatory capacity correlated with measurements of
waist-to-hip ratio (r = -0.553; p = 0.021), waist-to-height ratio (r = -0.502; p = 0.040), taper
index (r = -0.514; p = 0.035), relative fat (r = -0.612; p = 0.009) and lean mass (r = 0.612; p =
0.009). The activation of parasternal muscles was greater during MVV when compared to rest
(p = 0.001), as well as iNRD (p <0.001). Conclusions: There is a greater myoelectric activity
through parasternal activation during MVV and this is reflected in a higher rate of iNRD in
hypertensive individuals during maximum effort, and that there is a correlation between
anthropometric measures and the ventilatory capacity of these individuals. |
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