Acute left heart failure is a clinical syndrome of ischemia and hypoxia and respiratory distress due to heart valve disease, myocardial damage, arrhythmias, and anterior and posterior left ventricular overload resulting in acute decreased myocardial contractility, increased left ventricular end-diastolic pressure, and decreased blood displacement, which causes ischemia and hypoxia, mainly pulmonary circulatory stasis. Acute pulmonary edema is the most important manifestation, and cardiogenic shock or cardiac arrest may occur. How to eat to prevent pulmonary stasis caused by acute left heart failure? 1. Small and frequent meals. Patients with heart disease should not eat too much, and the total daily caloric energy should be divided into 4 to 5 intakes to reduce excessive gastrointestinal filling and diaphragmatic elevation after meals and to avoid increased workload of the heart. Dinner should be eaten earlier, should be light, after dinner not into or less into any food and water. All kinds of salted vegetables, soybean products, pickled foods (because they contain sodium salt) are contraindicated. 2.Limit sodium salt. This is a more appropriate method to control heart failure. In order to reduce edema, salt should be limited to about 3 grams per day. Vegetables such as golden cauliflower, celery, fennel, water spinach, etc. have high sodium content and should be eaten sparingly. 3.Appropriately limit the intake of protein and caloric energy. In heart failure, daily protein can be controlled at 25-30 grams and 600 kcal of caloric energy; after 2-3 days, protein can be increased to 40-50 grams and 1000-1500 kcal of caloric energy. After the disease improves, gradually increase protein and caloric energy, but should not be too high, so as not to increase the load on the heart. 4, should eat easily digestible food. Heart disease patients due to reduced blood circulation, gastrointestinal stasis, edema, affecting the digestion and absorption of food. Therefore, a liquid or semi-liquid diet can be used at the beginning, and then change to soft meals. The daily amount of staple food for heart failure patients should be controlled at 150-300 grams, with more vegetables and fruits, and moderate amount of fish, lean meat and dairy products. 5. Sufficient vitamins and appropriate amount of inorganic salts should be supplied. Such as vitamin B1 and vitamin C, to protect the heart muscle. Supply the right amount of calcium to maintain normal muscle activity. Potassium has a protective effect on the heart, and causes arrhythmia when insufficient. When using diuretics, in addition to potassium, attention should be paid to the supply of magnesium and zinc.