Data/hora: 01/06/2024 05:35:57

Provedor de dados: | Anais da Academia Brasileira de Ciências
País: | Brazil
Título: | Longitudinal study of the sympathovagal balance in women submitted to bariatric surgery
Autores: | LUCAS,CRISTINA M.S.; ZANIQUELI,DIVANEI; ALVIM,RAFAEL O.; MIGUEL,GUSTAVO P.S.; MILL,JOSÉ GERALDO.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Bariatric surgery; Autonomic control; Heart rate variability; Vagus outflow.
Resumo: | Abstract  Studies have shown improvement of the cardiac autonomic balance in post-bariatric patients. Most of these studies included patients using drugs interfering in the autonomic nervous system. This study assessed the time course of changes in the sympathovagal balance after bariatric surgery (Roux-en-Y gastric bypass) in 26 women free from drugs. A 10-min electrocardiographic recording was obtained at baseline and at 3 and 6 months after surgery. Temporal and spectral domains of heart rate variability were analysed. The time domain components of cardiac vagal modulation increased progressively after surgery. In the frequency domain, high frequency power increased from 24.9 at baseline (18.0 to 46.3) to 44.5 at 3 months (23.4 to 65.6), and 54.1 at 6 months after surgery (37.6 to 64.0) (median and IQR in normalized units). Low frequency spectral power decreased from 56.2 at baseline (39.6 to 74.4) to 36.8 at 6 months after surgery (24.9 to 53.9) (P= 0.036). Low frequency/high frequency ratio decreased from 2.3 at baseline (1.0 to 4.2) to 0.8 at 6 months after surgery (0.4 to 1.3) (P= 0.038). Progressive shift towards predominance of vagal tonus was detected in the follow-up. Most of the patients recovered low frequency/high frequency at 6 months after surgery.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100907
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765202020181184
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.92 n.1 2020
Fonte: | info:eu-repo/semantics/openAccess