I am a 79 yr. old female. I had my first atrial fibrillation in 1983 when I was 48 yrs old and was in intensive care for two weeks. I was given medication and reconverted (without using defibrillator); I was prescribed digoxin which was my sole medication until Jan. 2002, when I avoided a heart attack by undergoing angioplasty. Since then I have been taking amlodipine besylate, losartan, isosorbide mononitrate, and digoxin. I didn't have any fibrillation again until June 2005 and was pharmaceuticaly converted (in the hospital for three days, no difibrillator used). It recurred again in Feb. 2006, (in hospital for 3 days), and again exactly one month later, in March 2006 (in hospital for 5 days), again reconverted by medication with no defibrillator used; prescribed amiodarone 200 mg daily; I have been been taking this amiodarone since then for 7 years; I do not have a valvular problem; I am concerned about low pulse of 46; Thank you; appreaciate any advice you can offer me.