Perhaps everyone considering ETS surgery should see this: the National Institute of Health (NIH) Clinical Studies book, where sympathectomy is listed as a "Neurocardiologic Disorder", right alongside Parkinson's Disease, etc.
http://www.truthaboutets.com/Pages/NIH.html
I think it is fair to assume that of the thousands of people who have undergone sympathectomy for excessive sweating or facial blushing, few if any of them understood they were consigning themselves to a permanent autonomic system disorder.