,

Effects of surgically induced weight loss by Roux-en-Y gastric bypass on cardiovascular autonomic nerve function.

CONCLUSION: Surgically induced weight loss has a favorable effect on autonomic function, but it does not appear to be directly attributable to reduced insulin resistance.
PMID: 22222304 [PubMed – as supplied by publisher] (Source: Surgery for Obesity and Related Diseases : official journal of the American Society for Bariatric Surgery)