Summer is another high incidence period for cardiovascular diseases. Due to more water loss in the body in summer, the blood viscosity rises and blood circulation is obstructed, while the demand for oxygen and nutrients increases due to the accelerated metabolism of the body in summer, and the blood supply to the heart and brain decreases, which can aggravate the ischemic-hypoxic reaction. It is easy to induce heart attacks, strokes and other cardiovascular and cerebrovascular diseases. Every year from June to September, the hospitalization rate of stroke and coronary heart disease patients shows an increase. In hot weather above 35℃, the mortality rate of cardiovascular and cerebrovascular diseases increases significantly, so high temperature is a potential threat to patients with cardiovascular and cerebrovascular diseases. In addition, the summer overheating weather there are many people are prone to turn the air conditioning on very low, so that the temperature difference between indoor and outdoor is large, then this will easily lead to our vascular nerve regulation ability is poor, easy to induce cardiovascular disease attacks. Prevention of cardiovascular disease 1, summer easy to lose potassium and sodium should be supplemented at the right time into the heat, a little movement will sweat, the urgent need for hydration. Summer can not drink water only when you are thirsty as usual, but should take the initiative to replenish water, the daily urine volume of about 1500 ml that means that the body has enough water. Summer sweating, just hydration is not enough. Because with the loss of sweat is not only the body’s water, but also sodium salt; to maintain normal electrolytes, you can add some salt to plain water. The usual meals should be light, but in summer you can put more salt in the dishes, in addition, you should eat more fruits containing potassium, such as oranges, to maintain the balance of sodium and potassium. 2, avoid excessive temperature difference Summer outdoor heat, the room air conditioning cool, cold drinks, this repeatedly from hot to cold, from cold to hot environmental changes, is extremely detrimental to cardiovascular patients. Cardiovascular disease and temperature are very closely related. When the temperature is too high, it will increase blood flow in the blood vessels and increase the pressure on the heart; and when the temperature is too cold, it will make the blood vessels contract accordingly. If it is hot and cold, the strong contraction of the blood vessels will cause the plaque formed in the coronary arteries to be pulled and ruptured, causing thrombosis, blocking the blood vessels and sudden myocardial infarction. The environment should be kept as relatively constant temperature as possible, open the air conditioning can not be too cold, to move the body on a slight sweating is good. In addition, because the air conditioning makes the room closed, the air circulation is not good, easy to cause respiratory diseases. This is particularly dangerous for patients with cardiac insufficiency, such as lung infection, will be difficult to treat. 3, stable blood pressure can not reduce the drug hypertension and heart disease are twins. The high temperature in summer, the blood vessels are dilated to a certain extent, so that the blood pressure is stable. Some hypertensive patients see that their blood pressure is stable and stop taking their own medication, and then eat again when it is cool. This is completely wrong. Hypertension is a disease that requires lifelong medication and treatment is continuous. In the summer, patients can adjust the amount of medication under the guidance of a doctor, but must not stop the medication, bringing adverse effects to the treatment of autumn and winter. 4, to do the living in moderation, the appropriate time to exercise. Summer should be a season of “rest and recuperation” for the elderly, not a lot of exercise. Many elderly people are willing to get up early for morning exercise because of the early dawn in summer, but according to the survey, 70%-80% of cardiovascular and cerebrovascular diseases occur in the morning from 6 to 10 a.m., which is also the time of cardiovascular and cerebrovascular diseases. Therefore, you should try to avoid this time for exercise. Avoid going out unnecessarily, especially to places with high temperature, high humidity and dense population. When you must go out, wear light-colored, breathable and loosely woven cotton clothes and wear a sun hat or use a sunshade. Investigation shows that when the ambient temperature reaches 32 ℃, it is best to reduce physical activity, can take a variety of methods to regulate the indoor temperature, such as the start of electric fans, ventilation; ground sprinkling or the use of air conditioning, so that the indoor temperature is regulated at about 26 ℃, the temperature difference between indoor and outdoor control at 6 ℃ -8 ℃. In recent years, more and more families are using air conditioners, forming a temperature difference between inside and outside the apartment. Out of the home outdoors when the large temperature changes make it difficult for cardiovascular patients to adapt, because the sharp change in temperature will cause the human body vascular contraction and diastole, resulting in changes in blood pressure, causing blood circulation disorders, inducing myocardial infarction or stroke, therefore, the elderly with a history of cardiovascular disease should pay attention to properly reduce outdoor activities, more rest indoors, and nap 1 hour to supplement the lack of sleep at night 5, regulate Diet, meals should be “good color”. Patients with cardiovascular disease in the summer diet must be “good color”, such as yellow vegetables (carrots, sweet potatoes, tomatoes, etc., rich in carotene, lycopene) or green leafy vegetables, can reduce atherosclerosis. At the same time, eating the right amount of white food (oat flour, oatmeal, etc.) and black food (black fungus, etc.), to reduce blood viscosity, cholesterol has a significant effect. Diet should be a reasonable mix of meat and vegetables, eat more vegetables, drink more water, eat less and more meals, and eat lightly. 6, a balanced mind, regular life, adequate sleep. ”The heart is quiet and dangerous less”, emotional excitement is a cardio-cerebral vascular disease taboo, coronary heart disease, hyperlipidemia patients in particular should be relaxed, maintain a good state of mind, do not let the emotional ups and downs too much. Summer life should be regular, due to the long day and short night, people who do not sleep well at night, it is best to take a lunch break to ensure adequate rest and healthy living behavior. Patients with cardiovascular and cerebrovascular diseases should avoid participating in stimulating activities such as stock speculation and mahjong.