Back in November 2009, had an instance of
atrial flutter. I woke up in the morning, got in the shower, and after a few minutes felt like I needed to cough and then rapid heartbeat (150 bpm) started. Didn't go away all day, so I went to the hospital. Was checked into the hospital, diagnosed with flutter, given digoxin and cardizem and eventually converted (not sure if the meds helped. Chest x-ray, echo and stress test were all normal, blood tests normal.