After eating a toasted butter sandwich as a midnight snack, I experienced irregular heartbeats. Should I be worried?

It's possible that you experienced irregular heartbeats because the sandwich was high in saturated fat. Saturated fat has been linked to heart disease, so it's a good idea to avoid eating foods high in saturated fat. Foods that are high in unsaturated fats are a better option for your health. Unsaturated fats can improve your blood cholesterol levels and reduce your risk of heart disease.