Sort of, yes. When we consume food, our Stomach has to start to break down the food. This requires energy which means a greater supply of Oxygen, which has to be pumped by the Heart. So, eating does put an extra demand on the Heart. There is also a link to
the Heart and Acid production in the Stomach. The Vegas nerve has many functions in the body. It sends back data from many bodily processes to the central nervous system so adjustments can be made if necessary. It controls acid production in the Stomach and how much bile is produced by the Liver. It controls how much blood flow is sent to the Liver and it slows down the heart rate when necessary. If this nerve is compressed, by for example a bloated Stomach, it is theorised it can explain many strange symptoms felt in the body which are unexplainable by Doctors. It is thought that this may be why many people feel a sudden relief of discomfort if they can expel wind up through their esophagus.