Three years ago I had Ablation for A.F..in the last month I have developed a low heart rate in the 40's and mid 50's ( I am comfortable at 70) My Rhythum Doc. doesn't seem too concerned and told me when I started having heart rate in the 30's and 40's and being dizzy, passing out etc. we would be concerned... four years ago I had an arteriogram that was good ( I am 71 ) I am on coumadin and Tambacor for heart rhythm,blood pressure med. Cholestrol med...at a recent visit with the rhythm Doc I got the impression that he thought I was being too concerned with the problem.., that is a little difficult when you are living alone and frankly, I am concerned about driving , I was sitting down and talking on the phone when the last episode occured...any suggestions ???