Last spring I was diagnosed with atrial fibrillation. I am on medication and only had a couple of problems since. I had a follow up yesterday and it is all good. The current thought is that it is possibly caused by sleep apnea. I have a sleep study to look forward to next month. The nurse practitioner was great! She was the one who had done both of my stress tests and she remembered me and asked about my husband. It is tough getting old- but it beats the alternative!!