[Thoracic sympathectomy can alter many bodily functions, including sweating,[6] vascular responses,[7] heart rate,[8][9] heart stroke volume,[10][11] thyroid, baroreflex,[12]lung volume,[11][13] pupil dilation, skin temperature, goose bumps and other aspects of the autonomic nervous system, like the fight-or-flight response. It may diminish the body's physical reaction to exercise.[6][11][14]]
http://en.wikipedia.org/wiki/Endosco..._sympathectomy

and many more sites here -
http://www.google.com/search?q=sympa...ient=firefox-a

Did he say why the sympathectomy also??
Seems drastic unless other indications fit for you...