Your symptoms are not soley from stimulation or compression of the Vagal nerve of course. Most people have a hiatal hernia that was repaired at the time of banding, the top of the stomach is still healing and we take bites that are too large when eating, and drinking with our new device. That having been said the Vagal nerve is the 10th cranial nerve, a nerve that passes through the skull, and has both sensory and motor properties. It controls digestion, swallowing, heartrate, bloodpressure, and many other functions. The nerve, as it relates to gastric banding, passes through the diaphragm and runs across the upper part of the stomach. When you are banded or have a hiatal hernia repair the nerve is compressed and can cause symptoms such as chest pressure and/or dysphasia or difficulty swallowing. Nonetheless it is self-limiting and will improve over time. Keep in touch August folks!