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Just after eating a meal? For the last several months, I would get PVCs everytime I swallowed. If you do a Google search for Swallowing Induced Arrhythmia, you will find quite a few links.
Also, please see Vagus Nerve at Wikipedia. The Vagal Nerve (look up Vagus Nerve at Wiki though), extends down through the throat and along the esophagus and terminates (from the view on Wiki at least) on the top of the Stomach. I had been told that the Swallowing Induced facet of my Arrhythmia was due to Vagal Stimulation. The Vagal nerve supplies the heart as well.
In the Autonomic Nervous System there are two principle parts. One is the Sympathetic Nervous System that speeds up your heart when you are frightened or angry. The other is the Parasympathetic Nervous System that slows your heart down when the fear goes away or as the anger subsides. The Parasympathetic Nervous System controls the heart rate (for slowing) via it's connection to the Heart via the (drum roll please) Vagal Nerve. Since the Sympathetic and Parasympathetic Nervous Systems are involved with other organs as well, such as digestion and therefore your stomach, some undesired interplay may result, such as my Swallowing Induced Arrhythmia. Perhaps your problems are from a similar effect.
Other factors may also cause PVCs on a full stomach, such as unusual indirect pressure against your heart from your filled stomach, possibly resulting in a point of irritation causing the PVCs. Hemodynamics also can play a part, with increased demand from your digestive tract for blood, the rate and forcefullness of your heart beat will be altered.
If I had too much to eat and I lie down, I often get initially get PVCs.
If you have been seen by a Doctor and the PVCs are not causing any other problems, they are probably harmless. If you are concerned or if you symptoms grow worse, consulting with your Family Doctor may be in order.
Best of health to you and yours.