According to the World Health Organization statistics, about 12 million people die of cardiovascular disease each year worldwide, the “number one killer”, becoming one of the major diseases that seriously affect the workforce and threaten lives. Nowadays, most of our country enters winter, the temperature is cold, the temperature difference between day and night is big, for cardiovascular disease patients this is a dangerous period. How to actively do a good job of preventive work, the disease “strangled” before the onset of the disease, is extremely important. 1, the following conditions should be checked in time to the hospital Middle-aged and elderly people suddenly appeared chest tightness, panic, shortness of breath, precordial pain, chest and back pain, toothache, epigastric pain and other symptoms, should be checked in time to the hospital. 2, middle-aged and elderly people should also actively prevent respiratory diseases Winter is also a variety of respiratory diseases season, easy to cause colds, bronchitis and other respiratory diseases, this should be actively prevented, and once it occurs, to actively and effectively treatment.