Two weeks prior to the steps episode, I had been in the ER three successive days getting cardioverted. None of them worked. In fact, when I presented the first day of the three, the physician attending asked for me to be given adenosine, which put my heart into duress and slowed it right down. I was warned it would be a horrible, dreadful (as in a feeling of dread) when the drug hit my heart, but that it would be over inside of a few seconds. As the feeling of doom came over me, and I was alert for all of this experience, the internist triumphantly said, 'See, it's atrial flutter, not AF,' to the team of nurses around me. The slowed heart showed much more discrete information on the ECG panel display, allowing everyone (except me feeling more and more grateful to be rid of that awful sensation and flat on my back) to see what he meant. The flutter was news to me, and AFAIK, the only time I have had it.