I've had tachycardia for more than 3 years, have had 4 cardioversions (two lasted 8 or 10 months), several Rx meds, and am now on the appallingly expensive dofetilide/tikosyn for one month (after a required 3-day observation in the hospital). This morning I'm back in tachycardia–after only one month! It's a holiday, so I don't know what my cardiologist will recommend. I think tikosyn is the last hope for the medicines used for tacchy. I'm an 82-year-old woman living with some other health concerns, and I know that my cardiologist is reluctant to do ablations on someone my age (and he's highly experienced and respectful) and doesn't think a pacemaker would work for me. I'm strong enough to run errands by bike (can't do the 30+ rides anymore, alas) but I do get tired and sometimes weak in the legs. Do keep me informed. I'm also taking Eliquis (another $$ Rx).