Hi,
I do not know if this applies to you or not...
Are you on any over the counter ephedrines, or sinus meds?
Ephedrines and over the countr sinus meds have what you call beta blockers in them, which cause heart damage and also eurhythmia.
Also, the medications cause the same thing as they are also beta blockers, according to Dr Schulze.

Regular doses of some herbs do not cause this because they are not at extreme levels.
It is when herbs are abused that they also become a problem.
And Beta Blocker meds are always a problem.

If you are on beta blockers it is not safe to just go off them as it causes heart attacks, a good reason to go see Dr Schulze if you are.

Dr Schulze has suggested:
Hawthorn berry syrup
Dr Christopher's Nervine Formula for nerve impulse and heart.
Cayenne.

If you are dealing with sinus infections, then get off any dairy and use Dr Schulze's Herbal Snuff.

Of course you need to do the rest, which is changing your diet to fresh fruits and veggie juices, a raw food diet, pure water, hydrotherapy, rest and relaxation.
I would also suggest a good potassium broth on a regular basis to replace minerals... and balance the body as we have been so deficient from our diet.
I also would suggest you actually see Dr. Schulze , which is what many do when they are dealing with this, and what he actually suggests.
You may not know but Dr. Schulze battled a very serious heart condition when he was young, and was told he would not live very long, of course he did not settle with what the medical Dr's were telling him, and he proved them wrong!

Hope this helps and take care!