arrhythmia
"Diagnosed with atrial fibrillation in 2007. Three electrocardioversions, two ablations, a Medtronic ICD and 1000 mcg a day of Tikosyn and I am in sinus rhythm 99.998% of the time. Before treatment I was in A-Fib for 10 months. My Electrophysiologist prescribed  25mg twice daily of atenolol to help with the pounding heart beat side effect of Tikosyn. I turn 37 in August so my major concern is the long term use of Tikosyn. Its a fairly new medicine and there isn't any research of long term (20 yrs) dosage. So far, so good. It does make me tired, but that is a small price to pay to live without A-Fib."