Hi there, hope you are feeling better about things. I have been getting these missed beats for years off and on but they can still floor me if I get a bad run of them lasting a few days or more, even though ive had numerous negative tests over the years. As ive got older ive noticed a definate connection with my stomach though, since my digestive system doesn't seem to tolerate some food like before and if my stomach is irritated this seems to trigger a run of missed beats (something to do with the Vagus nerve being irritated, a large nerve that runs from the base of our brain down to the groin and meanders through various organs on its way!) Having said that, anxiety can trigger them through bad breathing, as can an imbalance in hormones too. Joyful stuff eh?