I once had an attack and the doctor told me it was the vagus nerve. He said the remedy is to lie down flat with the feet elevated and to do that if I felt another one coming on. Do you feel the attacks coming on, with sweats or funny feelings?
You can also Google Vagus Nerve and find many exercises to "reset" the Vagus nerve in addition to many books on the subject. A Functional Medical Practitioner might be more helpful if you can find one.

I had esophageal banding done for varices which basically is bans put around enlarged blood vessels in my esophagus so they don't bleed. I have cirrhosis and this procedure is pretty common, what isn't is the fact that ever since I had it done I can't eat without my heart pounding for hours and blurry vision, burning in the side of my neck and down the middle of my chest, hoarse voice ect. All symptoms of a damaged Vegus nerve. I believe that it was damaged during the procedure. I'm miserable. I can't eat solid food without being u all night with a pounding heart with scary palpitations in between. I don't know what can be done because healing a damaged nerve can be permanent or take years to heal. Any advice?