When it comes to haze, I believe many people know that it can cause respiratory diseases. But did you know? In fact, haze can also make blood pressure soar, which can lead to atrial fibrillation, arrhythmias and other cardiovascular diseases. Experts warn that the harmful substances in the haze are inhaled, especially for the elderly who already suffer from cardiovascular disease, which can easily lead to atrial fibrillation and arrhythmia. Many people mentioned air pollution, the first thought is PM2.5 will be bad for the lungs, did not think that the adjacent heart will also have an impact. But according to experts, the haze contains many harmful substances, such as the well-known PM2.5 is rich in many harmful gases, heavy metals, human inhalation, through the blood circulation to stimulate blood vessels, so that the adrenaline vasoactive components increase, which will lead to human vasoconstriction. The heart needs to beat the blood to the peripheral arteries, and once the peripheral arteries are contracted, the load of the heart’s blood discharge increases, the pressure increases, the blood pressure rises, and the oxygen consumption increases. In addition, the presence of these harmful substances in the endothelium of the blood vessel wall leads to increased output, and platelets are activated and then adhere to it, making it easy to form blood clots. The result of these effects is the triggering of myocardial ischemia and hypoxia, making it more likely that atrial fibrillation will occur. Therefore, the haze days should be minimized outdoor exercise, strenuous exercise, it is recommended that the main activities indoors, when going out need to wear a mask. Changing clothes and washing exposed face and hands in time after going out can reduce the pollution of indoor environment. The most important and basic thing is to maintain a relaxed mood, get enough sleep and eat more vegetables and fruits to improve immunity and reduce the occurrence of diseases.