@gaelgreen I also want to mention the book "The Afib Cure," by Day and Bunch. Although its focus is afib some of the suggestions might be helpful to you. Even before reading that book I did some of them: magnesium, low sodium V-8 for potassium, never reclining after eating, lying on my right side, tai chi for stress, breathing and exercise, daily walk and I use simethicone for GI gas. I continue to learn about my triggers. The book also covers "lifestyle factors" like weight, blood pressure, diabetes, diet and so on.

It sounds like your PVC's are so frequent that much of that is not relevant . In any case good luck with a cardiologist!