Avoid high-fat, greasy, thick food: The diet of coronary heart patients should adhere to the principle of “three low, two high and one excellent”, namely: low salt, low fat, low cholesterol, high vitamin, high fiber, high quality protein. Eating more animal offal, brain, spinal cord and egg yolk, roe and many kinds of shellfish and other high cholesterol foods, as well as high fat diet can aggravate coronary artery atherosclerosis. In addition, elevated blood lipids can make the blood sticky and cause the blood to run slowly, which can easily aggravate myocardial ischemia and hypoxia and induce angina. Elevated blood sugar is closely related to coronary heart disease and can increase the synthesis of triacylglycerol. Therefore, coronary heart patients should avoid high sugar diet. Excessive salt intake is one of the main causes of hypertension. And high blood pressure is the main risk factor of coronary heart disease, so coronary heart patients should also control the intake of sodium salt. 1, quit smoking and limit alcohol The harmful substances in cigarettes have a direct damaging effect on the circulatory system, which can make the human peripheral vasoconstriction, increased blood pressure, increased heart rate, increased myocardial oxygen consumption, arrhythmia. When smoking a large amount of carbon monoxide into the blood, so that the hemoglobin and oxygen binding capacity decreased, so that the heart muscle hypoxia, can induce angina pectoris, myocardial infarction, heart rhythm disorders, sudden death. And long-term heavy drinking, will accelerate atherosclerosis, so coronary heart patients should strictly quit smoking and limit alcohol. 2, avoid overeating and drinking a lot of excitatory drinks overeating can strengthen the blood flow of the digestive tract, resulting in a relative shortage of blood and oxygen supply to the heart muscle, and can make the gastrointestinal tract pressure rise, congestion. Blood sugar, blood lipids increase, blood stickiness, slow flow, causing myocardial ischemia and hypoxia. In addition, coronary heart patients should not eat food that is not easy to swallow, such as egg yolk, dry buns, etc., so as not to induce myocardial infarction. 3, caffeine in coffee can induce increased heart rate, arrhythmia, so that the myocardial oxygen consumption increased significantly, easy to cause patients angina, especially too strong coffee is more likely to cause such adverse reactions.