Gluten
People who have gluten sensitivity should limit it in their diet if they also have AFib. Gluten sensitivity often triggers inflammation as an allergic reaction after you consume foods with gluten. This inflammation sometimes affects the vagal nerve [15] associated with your heart. An inflamed vagus nerve predisposes you to AFib symptoms.
Studies have shown [16] that people with untreated celiac disease have atrial electromechanical delay (EMD). EMD is a major AFib risk factor [17]. It refers to the delay between heart muscle contraction and the detection of electrical signals in the heart.
If you have a gluten allergy, you should avoid eating gluten-rich foods. Gluten is a type of protein found in wheat, barley, and rye. Bread, pasta, and many packaged foods contain gluten. Always check the labels before buying.