I would be careful with straight chelation of one metal while dealing with AF. My nutritionist and I were just talking about this a few days ago. She did chelation before doing nutritional balancing and after all that she still had a lot of metal toxicity. The body has to be strong enough and nourished properly to be able to really release and eliminate these things. Chelation can be really hard on a person, especially if you are already in a weakened state.