I was 5 weeks out from my second ablation when I too went into flutter. Mine looked typical, but I read when it is post ablation you can't really tell the location based on the ecg. I wound up getting cardioverted on day 6, 50 J did the trick. I was sweating non-stop and my mitral regurgitation murmur was getting worse and I was getting short of breath at rest starting on day 4 of the flutter. I think my pulmonary hypertension wasn't liking that flutter crap. I wound up spending 7.5 hours in the ER waiting room. I definitely wasn't the sickest person there but I wasn't tolerating the 150 heart rate alternating with the BP in the 90s when I took the metoprolol to control the heart rate. I did okay the first 3 days, but then things fell apart. They had scheduled me for an outpatient cardioversion that would have happened on day 10. I got pretty dehydrated despite drinking a lot of water and eating okay. I'm told I'll be getting another ablation to fix this flutter issue in the winter or spring, 90% chance it will reoccur. I'm 2.5 weeks post cardioversion and am back up to my usual exercise. The flecainide and metoprolol they sent me home on lasted 4 days, I couldn't handle the beta blocker induced chronotropic incompetence. I couldn't make it up a single flight of stairs without gasping when taking the metoprolol. No way was I going to just take the flecainide, I'm scared of 1:1 conduction while in flutter, I'm sure I wouldn't tolerate a heart rate of 240! The coolest part of this nightmare was seeing my vena cava flutter on ultrasound. I didn't know it would do that.