Dizziness and fast heartbeat after meals may be caused by high blood pressure, heart failure, coronary heart disease, etc. It is recommended that the patient should consult a doctor in time for examination and make a clear diagnosis before carrying out the relevant treatment. 1. Hypertension: If you suffer from hypertension, you may experience increased blood pressure after eating, and it may also be accompanied by fast heartbeat, dizziness, headache and other symptoms. 2. Heart failure: after eating, the burden on the stomach will be increased, and there will be a lot of blood flow to the stomach, which will cause the heart to be overburdened, and if you suffer from heart failure, the patient may also experience dizziness, fast heartbeat and other symptoms after eating. 3. Coronary heart disease: coronary heart disease is also one of the causes of dizziness and fast heartbeat after meals, after eating heart muscle contraction will be enhanced, the heart rate will become faster, myocardial oxygen consumption will increase, which will cause the patient to experience dizziness, fast heartbeat, chest tightness and other discomforts. It is recommended that patients should go to the hospital in time to find out the actual cause, and receive relevant treatment as soon as possible without delay, so as not to aggravate the condition.