arrhythmia
"Have only been on Tikosyn for five days now (first three while in hospital). Writing this at 2:00 AM, so having some insomnia issues, and slight pain in chest upon deep breaths. First two doses did not cardiovert me, so had cardioversion via paddle, which got me back to sinus rhythm very easily, perhaps because of Tikosyn on board. Had previously gone out of sinus rhythm 19 days after successful ablation, with much post-surgical complications, which is probably why I didn't stay in sinus. Have yet to give this a really good test by exerting myself, maybe too soon yet, so don't know if I'll ever be able to be as active as I was. Other Tikosyn side effects so far - heart rate seems a bit rapid and get winded more easily. Will report back."