EverydayHealth reports that patients who suffer from atrial fibrillation should cut back on dairy and meat in their diet because the saturated fat content in animal-based foods aren't heart-healthy. Alcohol and caffeine also can trigger symptoms of atrial fibrillation. A diet rich in lean proteins, whole grains, fruits and vegetables is recommended.
Healthline lists several nondiet-related triggers of atrial fibrillation including illness, fatigue, stress, hormonal fluctuations, physical exertion and certain medications. Cold medications and nasal sprays present problems for many people with heart arrhythmias. Sleep deprivation also can be a trigger. Each person's experience with atrial fibrillation is unique, so it may take time to determine individual triggers.