I havn't had a drop of alcohol in close to 20 years and I have afib. My ablation doc told me what caused my afib was that the electrical connections in my heart were metaphorically "rusty." And he had to ablate the "rust." When he did that the connections could be made and voila! my heart beat in perfect rhythm. Now as to what causes the "rusty" spots to occur, I havn't the slightest idea. For years I tried to figure out what made my heart go out of rhythm. Was it stress? No, on very stressful days my heart would beat regularly, and it would go out of rhythm when I was meditating and extremely calm. Was it the weather? No. It was out on hot days. It was out on cold days. Was it food? No. It was out when I ate Mexican food. It was in when I ate Mexican food. Was it when I exercised? No. It was out when I went to the gym. It was out when I didn't go to the gym. I don't think anyone knows why it goes out. Am I wrong?