Longitudinal study of the sympathovagal balance in women submitted to bariatric surgery

Abstract

Studies have shown improvement of the cardiac autonomic balance in postbariatric 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.

Does bariatric surgery improve cardiac autonomic modulation assessed by heart rate variability? A systematic review

“…HRV was assessed in a comprehensive manner using five studies through Holter ECG, [37,41,43,44,45] followed by the Electrocardiogram (four studies) [35,38,39,40].…”

“…Seven studies were performed during the rest period considering a recording between 5 to 30 minutes of HRV duration [34,35,38,39,40,43,46]. A further five studies [37,41,42,44,45] performed the recording of HRV for 24 hours, and two studies did not report the recording time [36,47].…”

“…Vertical Sleeve, Biliopancreatic Diversion, Duodenal Switch and Adjustable Gastric Band) on restoring autonomic control of HR[34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In a corresponding way, recent experiments have correlated the improvement of HRV with other physiological variables that have implications for the morbidity profile of obesity (e.g., Leptin, GLP-1, NT-Pro-BNP, Insulin Resistance) as they have an affinity with the cardiovascular functioning[34,[36][37][38][39][40][41][42].Nevertheless, thus far, no study has anticipated investigating the techniques needed to access HRV after BS in primary studies and, what are the effects of different types of BS techniques on HRV?…”