I had an ECG done a while back and it showed RBBB, Mild. I got so upset over it a few weeks later, I went back to the doc and had a holter, it was fine/ Now I had the episode a week ago, (see below_ that no one ever replied too. In the ambulance they saw it, in the er they saw it now two days later at my doc, she said on the EKG she just did, it did not show it? Can they come and go??