@woody5
I want to make sure I state not a medical professional nor trying to give medical advice. But are you going to a medical facility with experienced cardiologist? You did not mentioned seeing a Electrophysiologist (EP). They deal with electrical issues of heart and arrythmias, PVCs, PACs, VTAC, etc.

They can do studies to see what is going on electrically with your heart. I had LBB and tons of PVCs. An ablation was done on my RV and it stopped PVCs. I now have PVCs on left side that were really getting bad.

I wanted to do another ablation on LV but EP wanted to try medication first. FYI my heart to can speek up time to time when my PVCs get really out of whack. I was put on Amidaorone several years ago for tachacardia episodes but wanted to get off as if very toxic. I did wean off of it but took several months.

With the increase in PVCs in LV I was put on a medication to help with heart rympthm. It is called Mexiletine. Unlike Amidarone it is not highly toxic but because it leaves the body quite quickly you have to take it 3 times a day 8 hours apart. But it drastically reduced my LV PVCs and calmed down my heart rympthm.

What is your regular HR? I can only give you my experience with heart rympthm problems but from my expereience I would find a good electrophysiologist to see what is going on electrically with your heart to see what is causing the heart going into high rate you are feeling.

They probably (just my experience) will do ECG (you probably have had many) and a holter monitor. The holter monitor will monitor the electrical signals in your heart to help determine what is causing the high pulse rate.

For me the holter monitor found I had PVCs coming from 3 different area of my LV. Thus medicaion to help keep heart in rympthm and for the medical worked.