Hi Kitt, hope all is well at home. You and your hubby are in my thoughts and prayers.
I stumbled on this link at Wiki. I usually am circumspect about
health articles there, but this one segued in to some of the things we're discussing in regard to non-heart causes of palpitations. My only caution is that the article states that if you have more than 6 per minute (say of PVCs), that "it can indicate a problem". By this, they are addressing people who have not been seen by a doctor and tested. If you've been cleared by a doctor, you can have far more than 6 per minute and still have a benign condition, and if I persistently had any per minute I'd see my doctor for an evaluation. The odd thing is many, if not most, people do not feel their palpitations, so even if they had more than 6 they'd be unaware.
My rule of thumb: if you've experiencing palpitations for the first time, see your doctor for a consultation. If you typically experience them, but they markedly worsen, see your doctor. If they are accompanied by other symptoms, such as pain, difficulty breathing, unexpected sweating, etc, visit the Emergency Room.
Now to the Wiki Link:/en.m.wikipedia.org/wiki/Palpitation
They even covered this:
"Gastrointestinal distress such as bloating or indigestion, along with muscular imbalances and poor posture, can also irritate the vagus nerve causing palpitations)"
I have noted a change in belching that is concomitant with my increased PVC frequency (and according to my rule of thumb, I have been seen by 2 cardiologists, 2 E.P.s, and my family doctor), I now have to lean forward to belch. Pursuant to this, I'm going to push for an upper GI.
Hope you enjoy the info at the link, I think it was fairly well organized.