A festive dinner, a buffet plate piled high, or a late-night meal can leave the stomach feeling uncomfortably full. For most healthy people, one heavy meal is unlikely to suddenly damage the heart. But that does not mean the heart is completely unaffected.A very large meal, particularly one high in fat, salt and refined carbohydrates, can temporarily change the body's workload. Digestion increases blood flow to the gut, while certain foods can influence blood pressure, blood vessels and blood su