I have been delaying buying a heart monitor system such as an AliveCor or Kardia as I think they are now sold. I was in Persistent AF for nine months prior to an unsuccessful CV this week and that hasn't changed. My question is, is it worth purchasing one of these units if it's only going to tell me what I already know, or is there some other useful information that I can get from it. Would love to hear from users the pros and cons of them. Thanks.