The large temperature difference between morning and evening in northern Shaanxi and the cold climate can put the human body in a state of stress, which is a dangerous period for patients with cardiovascular diseases. Vasoconstriction increases blood pressure, coronary artery spasm, and even atherosclerotic plaque rupture, leading to vascular blockage, thus causing the occurrence of angina or myocardial infarction. At the same time, winter is also a high season for heart failure, cardiogenic shock and arrhythmia, and every year, the number of patients attending hospitals for cardiovascular diseases increases dramatically at this time. In order to make cardiovascular disease patients can successfully pass this dangerous season, the usual health care is very important, mainly should pay attention to the following aspects: 1, pay attention to keep warm. Cold weather can easily lead to vasoconstriction and spasm, causing cardiovascular blood supply deficiency, resulting in myocardial infarction. It is recommended that the indoor temperature should preferably be 18~25℃, the temperature difference between indoor and outdoor should not be too large, and the room should be ventilated frequently. Avoid walking sharply into the wind, and at the same time, according to the weather conditions, add clothes in a timely manner. 2, quit smoking and less alcohol. Smoking is an important factor causing myocardial infarction, stroke, should absolutely quit smoking. Drink a small amount of beer, yellow wine, wine and other low wine can promote blood circulation, blood and Qi reconciliation, but can not drink strong wine. 3, control emotions. Keep a normal heart, do not give yourself unlimited pressure, to do a combination of work and rest. Do not work overtime for a long time and stay up late, after a long period of work should be properly adjusted to rest. Can participate in appropriate recreational activities, adjust the mentality. Emotional excitement is a cardio-vascular disease taboo, coronary heart disease hyperlipidemia patients in particular should be relaxed, do not let the emotional ups and downs too much. 4.Control the diet. Drinking less water in winter, it is easy to make the blood concentrated and increase the burden on the heart. Coronary heart disease patients in the cold season to drink more boiled water, avoid high salt, high fat, high cholesterol food, eat more fruits and vegetables, do not eat or eat less hot pot, spicy hot food, eat more easily digestible and nutrient-rich light food. 5, appropriate exercise. General cardiovascular patients are not suitable for morning exercise, 6 to 12 am every day is the high incidence of myocardial ischemia and arrhythmias in patients with coronary heart disease, so patients with coronary heart disease suddenly and drastically exercise in the morning, the sudden increase in neural excitability, is very likely to induce cardiovascular disease. Wait until the temperature is more suitable for exercise, you can properly jogging, walking, etc. 6, adhere to treatment. Patients should take their medication on time in winter, do not reduce or stop medication without permission. Cardiovascular patients should always have emergency drugs, such as cardiac pain, nitroglycerin and compound salvia drops. If symptoms such as dizziness, headache, palpitation, chest tightness, chest pain, difficulty in breathing, unsteadiness in walking, etc. occur, stop all activities immediately and take sublingual cardiac pain or nitroglycerin, compound salvia drops, etc., and inform family members immediately, or call the emergency number for help. 7. Special attention. Those who already have cardiovascular disease should get enough sleep. Wash your face and brush your teeth with warm water, and wear warm clothes when you get up at night. Do not take a bath in the case of hunger, the water temperature should preferably be comparable to the body temperature, and the bathing time should not be too long. Patients with coronary heart disease should develop good bowel habits.