The heart muscle is most afraid of ischemia, and with ischemia comes hypoxia. The decrease in cardiac blood output is mainly due to changes in the substances contained in the blood and pathological changes in the lumen of the blood vessels. In addition, high age, high blood pressure, diabetes, obesity, mood swings, alcohol and tobacco addiction, as well as adverse reactions to certain medications, can cause vascular changes resulting in reduced cardiac output and intravascular thrombosis. So what should we pay attention to in the diet of reduced cardiac output? 1, control calories, maintain the ideal weight. 2, control the quality and quantity of fat intake. 3, control the intake of sugar. 4.Appropriately increase the intake of dietary fiber. 5.Provide rich vitamins. 6.Ensure the supply of essential inorganic salts and trace elements. 7, a small number of meals, do not overeat, dinner should not eat too much, otherwise it is easy to induce acute myocardial infarction. 8, forbidden to drink strong alcohol. Alcohol can accelerate the heart rate, can aggravate myocardial hypoxia, so alcohol should be prohibited.