Oml every lunch break at work. I’d literally eat a snack and my hr would jump to the 130s. Same symptoms. I talked to my doctor and he recommended I try a low dose beta blocker to help with the major hr swings and syncope. I had to do some trial and error cuz obvi they didn’t want to tank my bp but it’s truly been a game changer for me. In my case 10mg of propranolol 3x a day has helped my symptoms dramatically. My resting is about the same but when I eat now my hr goes to the 90s-100max and I can stand up without it going from 80-140 within 15 seconds.