Early spring is one of the most vulnerable times of the year for people to get sick. In our country, there has long been a saying that “it is difficult to endure the cold in spring”. From the medical point of view, it is easy to suffer from myocardial infarction at this time, which is closely related to the inability of some old patients to adapt to seasonal changes, especially the change of climate from cold to warm. Therefore, myocardial infarction should be prevented in early spring.
The spring weather in mainland China is characterized by cold winter, hot summer, dry and wet; The air pressure is also high and low, which is very unstable. The cold wind blowing in spring is very stimulating to the human body. If you always treat the spring wind as a warm wind and neglect it, you will often catch a cold due to the sudden attack of this cold. In spring life, some elderly people are prone to sudden myocardial infarction because they suffer from coronary heart disease and can not stand the sudden change of climate.
Medical research believes that the cold air of “cold in the spring” is the chief culprit of angina pectoris. Experiments have proved that when cold air of 5 ℃ ~ 10 ℃ is suddenly inhaled, ECG of patients with coronary heart disease often shows changes similar to angina pectoris.
Due to the stimulation of cold, the myocardial oxygen consumption index increases, the sympathetic nerve is excited, the peripheral blood vessels contract, the peripheral resistance increases, and the left ventricular load increases, resulting in myocardial hypoxia. In addition, cold may also trigger coronary artery spasm. Statistics show that 67% of patients with myocardial infarction are related to cold.