Every year when summer comes, when the temperature exceeds 33℃, the air humidity is high and the air pressure changes rapidly, the number of cardiovascular and cerebrovascular patients will increase significantly, especially those with coronary heart disease. It can be said that summer is the most difficult time for coronary heart disease patients. So, how can patients with coronary heart disease prevent heart attacks and spend the summer safely? The following points deserve your attention. 1. prevent heatstroke: wear a sun hat and have enough water when you are outdoors or working. It is not advisable to go out for labor or long-distance travel when the temperature is high from 10:30 to 15:00 every day. Prevent the reduction of coronary artery blood supply due to peripheral vasodilation and insufficient blood volume. Myocardial ischemia and induced angina pectoris. When the temperature exceeds 35 ℃, should use air conditioning, the room temperature control at 25 ℃ ~ 26 ℃ is appropriate, sleep should pay attention to cover the abdomen to avoid cold and cold. 2. Eat a light diet, eat less and more meals: advocate “four low and one high”: low calories, low salt, low fat, low cholesterol, high vitamin, preferably eat warm food, should not eat more sweets and spicy stimulation, cold drinks and cold food products. Also pay attention to hydration, drink more cool boiled water or light salt water. 3. Stable emotions: hot, windless, humid, suffocating are easy to make the patient’s emotions fluctuate. Irritability, depression, unwarranted anger, etc., which for people suffering from cardiovascular disease. All will pose a great threat. Easy to occur angina, myocardial infarction cerebral infarction and other sudden diseases. 4. moderate exercise: summer activities and exercise should be simple and light, after dinner when it is cool to carry out the appropriate intensity of activity is appropriate, the intensity of exercise to have control, reduce the heart load, reduce myocardial oxygen consumption. Rainy weather, sultry weather. Or hot weather, outdoor activities should be reduced. 5. Timely medical consultation: patients with a history of coronary heart failure, once the chest tightness and other uncomfortable symptoms, must be timely medical consultation. 6. Do not stop or reduce medication at will: especially statins need to be taken for a long time for patients with coronary heart disease.