Hi daizy, welcome to healing well forum. I am not a doctor nor do I have this condition so I cant really comment on your diagnosis or findings of your tests here. I would however say if your not feeling comfortable with the level of care that your getting at this point then most certianly get a second opinion. In any case it is good to get one regardless when your diagnosed with something of this magnitute.
I have seen other members post regarding this same thing so hang tight...sometimes the heart forum here gets a little slow but I am sure they will be along shortly to post replies and advice/suggestions to you. Please do keep posting, I hope you find it helps with information and support. Take care