When it comes to the devil season with high incidence of heart attacks, the first thing that comes to mind is winter. But in fact, the incidence of myocardial infarction in summer has also shown an upward trend.
Obviously, the temperature is rising, and the blood vessels are in the stage of expansion due to the influence of high temperatures, so why is the incidence of myocardial infarction high in summer? To know the answer to this question, first of all, we must understand what a heart attack is!
The so-called myocardial infarction, in the clinic, is called acute myocardial infarction. It refers to the patient's original presence of atherosclerosis, coronary heart disease and other diseases, the coronary arteries are in a relatively narrow, hardened state. Once the narrowing area of blood vessels exceeds 70%, and the coronary arteries are thrombotic and blocked, it will lead to instantaneous hypoxia and necrosis of the myocardium, resulting in a sudden myocardial infarction.
During the onset of myocardial infarction, patients will not only have obvious symptoms of angina and atypical pain, but once the myocardial necrosis area is large, patients may gradually develop heart failure, shock, and even sudden death. According to the data available in clinical practice, myocardial infarction is the biggest risk factor for sudden death of Chinese residents due to disease.
The reason why summer is a high incidence of myocardial infarction is mainly related to the following three reasons:
1. The weather is hot
Whether in the north or the south, after entering the middle of summer, the local temperature will increase significantly, and even reach about 30 ° C.
It should be known that blood vessels are very sensitive to changes in temperature, the surface blood vessels of the body rapidly expand, the blood flow is supplied to the blood vessels on the surface of the body, the pumping burden of the heart will not only increase, but also the myocardium and brain tissue are in a state of ischemic oxygen, and the blood pressure will also rise, which can easily cause myocardial ischemia and myocardial infarction.
Moreover, in the summer, residents in many areas are accustomed to using air conditioning, when the difference between the outside temperature and the indoor temperature is large, the short-term hot and cold stimulation is easy to cause vasospasm, intravascular plaque shedding to form a blood clot, and myocardial infarction can also suddenly erupt;
2. Emotional aspect
One thing that has to be said is that people's mood can change due to changes in the weather. Cool weather can make people feel comfortable. On the contrary, in the case of hot climate, people are prone to a state of boredom and anxiety.
And affected by the hot temperature, summer sleep is more unstable, prone to insomnia and dreams and other problems. Long-term emotional hyperactivity, anxiety and irritability will cause irritation to endocrine organs, resulting in a large amount of adrenaline, angiotensin secretion, and increased blood pressure.
For patients with underlying diseases, especially coronary heart disease, the instantaneous fluctuation of emotions is precisely a major risk factor for promoting angina and myocardial infarction;
3. Lack of water in the body
The hot summer temperature will cause themselves to sweat a lot, and some people are accustomed to exercise, and the water in the body can gradually decrease with sweating.
Once a large amount of water is lost, it will lead to imbalance of water and electrolytes in the body, increased blood viscosity, and the pumping pressure of the heart will also be aggravated, affecting the normal blood supply of cardiomyocytes and aggravating the possibility of myocardial infarction.
Written in the end: the reasons for the high incidence of myocardial infarction in summer are mainly related to the above three aspects. To survive this devil's season, patients need to actively control their emotions, hydrate and regulate their diet in time, and maintain an optimistic and cheerful attitude.
Patients who have already developed primary diseases should also cooperate with doctors to carry out targeted treatment of the primary disease to reduce the incidence of myocardial infarction.