Does hot weather have an effect on hypertension?

For the analysis of impact, please refer to the following six points:

1. With the temperature rising, the subcutaneous blood vessels of human body dilate, the blood flow of skin increases 3-5 times than usual, and the blood flow back to the heart also increases obviously, which will inevitably increase the burden on the heart.

2. When people are at high temperature, the excitability of sympathetic nerve increases, the heart rate accelerates and the coronary artery contracts, thus increasing the workload of the heart.

3. Sweating a lot in summer, a lot of water in the human body evaporates through sweat, and blood viscosity increases. When it reaches a certain level, there may be a tendency of blood coagulation, leading to ischemia or cardiovascular and cerebrovascular blockage, and in severe cases, it may cause myocardial infarction or stroke.

4. The weather is sultry, people's emotions are easily excited, and their autonomic nerves are disordered. Medical research shows that people who are exposed to high temperature for a long time are prone to nervousness and depression. With the aggravation of symptoms, the probability of cardiovascular events such as sudden death and myocardial infarction will gradually increase.

In summer, the weather is hot and dry, and the days are long and the nights are short, so people often can't get a good sleep. Poor rest is one of the important causes of cardiovascular and cerebrovascular diseases.

6. The humidity in the air increases and the oxygen content decreases, which easily leads to hypoxia. People with hypertension, coronary heart disease or cerebral arteriosclerosis all have different degrees of cardiovascular and cerebrovascular stenosis. When the oxygen content in the air is sufficient, the activity is moderate, and effective vasodilators are taken, patients may not feel any discomfort.