Afib is a very dangerous condition, it can and often leads to a stroke, so often an ablation is used to get the heart back beating correctly, as
Ed and claytex mentioned. Amiodarone is a drug that is extremely effective in getting the heart to beat regularly, but as claytex mentioned, it has side effects. However, danger of a stroke trumps the side effects of the drug. I went into Afib after bypass surgery and was administered Amiodarone, and it stopped the Afib within twenty-four hours.