Certain fatty foods
Not all fatty foods are healthy, especially for your heart. If you eat foods high in saturated and trans fats, you may be increasing your risk [11] of developing AFib and other cardiovascular diseases. Recent studies have also found a link [12] between chronic AFib and diets rich in saturated fats but low in monounsaturated fats.
Avoid red meat and foods like butter and cheese, which all contain high amounts of saturated fats. Trans fats (a type of unsaturated fat found in fried foods, cookies, margarine, and partially hydrogenated vegetable oils) also increase your risk of coronary artery disease, among other conditions.
It is not clear whether replacing saturated fats with unsaturated fats removes the risk. One study found that men who consumed polyunsaturated fats had an elevated risk of AFib [13]. Other studies have found that the risk of AFib reduced [14] in people who consumed omega-3 polyunsaturated fats. More studies are needed to understand this topic.
If you are considering swapping saturated fats with unsaturated fats, go for healthy sources of omega-3 fats like salmon, tuna, and sardines. Nuts, avocados, and olive oil are great sources of monounsaturated fat.