What form of Magnesium for Premature Ventricular Contractions?

Good morning/afternoon/evening! I'm a 56 yo male currently having bigeminy PVCs multiple times a day, lasting anywhere from ten seconds to around a minute. I had them about 4 years ago, went through stress test, nuclear stress test, echocardiogram, etc. but they found no cause for the PVCs. Eventually they went away. About 5 months prior to those I had come off Eliquis for a DVT blood clot in my left leg that lasted 9 months. They don't believe the blood clot caused the PVCs. Last October I started having them again, more frequently. I have gone through the echocardiogram, stress test, and sleep study this time and everything looks good except for when the PVCs occurred. During the stress test the PVCs happened most frequently when my heart rate was between 89 and 110, but in ever day situations they happen at any heart rate. I have bradycardia (resting heart rate is around 44...and it's not because I'm in great shape) therefore I've been told that beta blockers aren't an option. I don't see the electrophysiologist until May 2nd so I'd like to try taking Magnesium to see if it helps with my PVCs. I've read different opinions throughout the internet as to what's the best Magnesium to take: Glycinate, Threonate, or Taurate. Can anyone please give some clarification as to which form is really the best for PVCs? Or at least give me your experiences with the forms you've tried? Thank you very much!!!