I am a 42 yo male in excellent health, diagnosed with AFIB in March after a 2-month mystery virus (fever, flu-like symptoms). Ultrasound, stress test, and cardiac cath were all normal/negative. Bystolic and flec worked great but switched to propaf due to side effects (tremoring, anxiety). NSR most of the time. Saw EP for 2nd opinion and dose was increased last Tues to 225 mg 3x day + 25 mg metop ER 2x day. Thurs, I went into AFIB and have been in it since, my longest episode ever.