It is well known that the cold winter and spring seasons are a time of high incidence of coronary heart disease, as the cold can easily lead to sudden cardiovascular contraction and thus cause the disease. In summer, although the incidence is not as high as in winter, it should not be taken lightly. When the temperature rises, the human subcutaneous blood vessels expand and the blood flow to the skin increases 3 to 5 times more than usual, resulting in a decrease in the amount of blood returned to the heart, which may affect the blood supply to the heart muscle. And in the hot environment, sympathetic excitement and faster heart rate may also increase the risk of coronary heart attack. Therefore, even in summer, it is still important to be alert to the occurrence of coronary heart disease. To prevent coronary heart attack in summer, coronary heart disease patients, especially the elderly coronary heart disease patients, should start from the following aspects: a. Outdoor activities to pay attention to the heat and cooling Coronary heart disease patients in outdoor activities, be sure to wear a good sun hat and prepare enough water. When exercising, you should choose to do it in the cooler mornings, not when the sun is shining, and to shorten the exercise time. If the weather is hot and humid, you should reduce or even stop outdoor exercise. Second, pay attention to adjust the indoor temperature indoor temperature to 25 to 27 ℃ is appropriate, do not go below 20 ℃; from outside into the air-conditioned room to dry sweat; keep the indoor air fresh, with air-conditioned rooms to regularly open the windows for ventilation, the best way to keep the room open 2 to 3 times a day, sleep at night can not be open overnight air conditioning. Third, maintain emotional stability Coronary heart disease patients to maintain a healthy emotion, only psychological balance in order to physiological balance, the normal function of the organs, blood flow, away from the threat of heart attack. The diet of coronary heart disease patients should be mainly light, can eat some lean meat, fish, try to eat less too greasy or high fat, high cholesterol food. Eat more fresh vegetables, fruits, black fungus, soy products, to ensure the intake of fiber, as well as balanced nutrition. Five, pay attention to replenish water summer sweating, easy blood sticky, increase the pressure on the heart is not good for patients with coronary heart disease, so drink more water, to more than 1500 ml per day is better. In addition to plain water drinks preferred green tea. Warm drinking green tea has a strong anti-oxidant free radical effect, has a good anti-cancer, anti-atherosclerosis effect. In addition, you can appropriately drink some green bean soup, lotus seed soup, lily soup, etc., can replenish water, but also to relieve the heat, two birds with one stone. Try not to drink ice drinks, drinking a lot of ice drinks in a short period of time can induce angina, acute myocardial infarction. Six, to ensure adequate rest Coronary heart disease patients who go to sleep late at night, should not get up too early in the morning, noon to rest properly to supplement the lack of sleep. Half an hour before going to bed or waking up in the middle of the night and early in the morning, it is recommended that patients with coronary heart disease drink warm water in moderation. Seven, timely medical treatment Last but not least, if you have symptoms of coronary heart disease such as chest tightness, chest pain, dizziness and palpitations, panic attacks, please seek timely medical treatment.