So I am a 30 year old male who in August of last year was diagnosed with suspected POTS syndrome, I have tachycardia when I stand up and I often feel cold extremities, and other symptoms of autonomic dysfunction.
The big issue has been in the last 4 or so months my PVCs have been getting steadily more frequent. I am desperately trying to find a cause of these ectopics or a way to lessen them but to no avail. I have had an echo done which showed a structurally and functionally normal heart. I've had several holter monitors including a 72 hour monitor which shows that I have around 1,079 ectopic beats per day, with an ectopic burdon of 1.1% and a few instances of trigeminy (although generally only PVC, beat, beat, PVC then back to sinus rhythm so I am not sure if it barely qualifies) - the weird thing is a huge number of my PVCs are apparently "interpolated" - I feel these a lot worse than normal ones as it feels like a beat, beat, beat beat beat, beat, like a big flutter in my chest.
I've tried magnesium and potassium supplements, at best these reduce the intensity of the thudding but do not reduce their frequency by any stretch. I find they are often triggered more when I am talking and also after I sit down from being stood and my heart rate slows right down quickly as it usually shoots way up very quickly due to the pots when standing. I find when standing and my HR is a little faster that the PVCs either reduce in frequency or go away completely, or at worst, stay the same.
I have had tests to rule out Addison's and Cushing's syndrome. The only other possible pertinent thing is that I have a very bad lower back after I herniated a disc about just over 1 year ago (late 2017).
What could be the cause of so many PVCs? Especially so many interpolated PVCs? They're scary and really annoying and although I've never had, as far as tests go, any couplets, NSVT etc. I am scared of NSVT, VT and VF and dying...