Trust me on this, your Cardiologist has your health and best interest in mind. See a Gastroenterologist. I have had both heart issues as well as GERD issues, your symptoms sure sound like you have an issue with digestion. PVC's are something almost everyone has, and because eating is a trigger, you may have problems with GERD, a swallowing issue, or other issues associated with eating.
It sounds to me like you have a great Cardio doctor, based on your post. Trust him/her.
Keep us informed.
It could be a gastric problem, even a hernia such as a hiatal hernia. I would probably start with the gastroenterologist because it is associated with eating. These experts soon know if it is heart related and steer you towards a cardiologist anyway.