Possible causes of rapid heartbeat after eating include excessive eating, diaphragm elevation, occult ischemia of the heart, and cardiac arrhythmia. You should pay attention to controlling your diet and go to the hospital for ECG and other tests to rule out organic diseases or treat the symptoms. 1. When eating too much, a large amount of blood will gather in the gastrointestinal tract, which will lead to ischemia of the heart, so it is easy to reflexively appear the symptoms of panic, heartbeat, and in serious cases, chest tightness, shortness of breath and chest pain. 2. In the oversaturated state, the diaphragm will lift upward and compress the bottom of the heart, thus causing myocardial ischemia in the lower wall, and after myocardial ischemia, symptoms of panic and rapid heartbeat may occur. 3. When there is hidden ischemia in the heart, there is usually no abnormality, but after meals, the gastrointestinal tract needs more blood, the coronary artery blood supply will be relatively insufficient, causing myocardial ischemia and hypoxia and thus rapid heartbeat. It is recommended to go to the regular hospital to complete the relevant examinations, such as electrocardiogram, Doppler ultrasound, if the heart rate is simply accelerated, there is no need to worry too much. 4. If there is arrhythmia or insufficient blood supply to the heart, timely medical treatment is needed. If it is serious, an electrocardiogram or coronary angiogram should be done to clarify the cause. If the condition is not relieved after resting, it is recommended to consult a doctor in time to avoid delaying the condition.