I was like this last year PACs, PVCs and waking during the night with a heart rate at 140bpm-180bpm and a racing heart when I first got out of bed. **I also was having digestive issues**, bloating and intestinal pain. I ended up in A&E twice as my GPs would not deal with a tachy over 160bpm and phoned an ambulance.
As pooh1953 said these heart issues would improve after burping??? A cardiologist gave me the all clear and said PAC/PVC is normal it is just some people get it more often and some people notice them more, but my tachy was sinus rhythm which was odd for an arrythmia, so could only suggest an electrophysiology study (invasive and not without risk). I had a strong feeling my stomach bug and digestive issues where just too coincidental and my BIL (a medic in a different field) did say there was no reason to doubt this view. I undertook a lot of research and trial and error after getting no help from the GPs who did not understand how fed up, stressed and tired these issues can make you and who did not have a clue what to do with me and did not want to refer me to gastro.
To cut a very long story short I found mine is due to food intolerances and Histamine and controlling the Histamine has "cured" the heart issues. Basically GPs/Cardiologists do not tell you about
this and I firmly now believe many people are suffering when they don't need to (hence coming on here to try and help anyone suffering alone like I did last year before I joined the dots through diet diaries and endless research through scientific papers etc...). My GI consultant (also a uni prof. so up on the research) who I ended up paying private for as I needed the help, has also very clearly said what happens in your gut DOES affect your heart and PVC/PACs are common in IBS patients.
Histamine is the mechanism for postprandial tachycardia (speeding your heart up after you eat which is normal, as you will divert more blood flow to the intestine so there is greater demand like for example the demand from your muscles when you exercise). It is also why food intolerance aps now diagnose food intolerances using heart rate variability monitoring. Histamine Intolerance is not recognised yet in the UK, or US so do not expect your GP to know that much. It is however being recognised in some countries in Europe where PAC/PVC/Arrythmia is in the main list of symptoms. Histamine is a normal chemical signal mechanism in the body and we have receptors everywhere:
•Histamine H1 receptors: Smooth muscle and endothelial cells affecting skin; blood vessels (Benadryl and Claritin block activity of these receptors)
•Histamine H2 receptors: Cells in the intestines control acid secretion, abdominal pain, and nausea; heart rate (Histamine H2 receptor antagonist drugs have been used to reduce symptoms of dyspepsia and GERD)
•Histamine H3 receptors: Central nervous system controlling nerves, sleep, appetite and behavior
•Histamine H4 receptors: Thymus, small intestine, spleen, colon, bone marrow and white blood cells; immune function and inflammation
Histamine is released into your gut in the early hours of the morning and you need enzymes to break it down. Not everyone has enough of these... and probably explains why my issues hit me like a train after having a nasty stomach bug and the tachycardia was on time for it's 1:30am appointment most nights. I suspect I do not produce enough DAO, which makes sense as I also became lactose intolerant after the stomach bug as I no longer produced lactase. Most enzymes are produced in the ends of the finger-like villi and these can become damaged (often temporarily) after stomach infections/parasites etc...
I really hope this helps someone. My advice is; as odd and unrelated as it seems keep a diet diary along with a heart incident diary you may well find you cause is something you least suspect - my main cause was the humble potato! Do look at the nightshade group of foods as these are in the same group as atropine and we know what that does!
eta: if anyone wants any further info please just ask (this is the edited version of my experience or the post would be even longer!), I really do understand how awful you can feel when going through this.
Post Edited (Flo_Z) : 6/13/2015 1:29:37 PM (GMT-6)