Decreased systolic blood pressure

Systolic blood pressure is when the human heart contracts, the pressure in the arteries is the highest. At this time, the pressure on the inner wall is called systolic blood pressure, also known as high pressure. High altitude hypotension is mainly caused by lower systolic blood pressure, and it is more common in women than men. The mechanism of its occurrence is unclear. It may cause autonomic dysfunction due to hypoxia, increase vagal nerve tension, cause bradycardia and reduce peripheral resistance. Some scholars also believe that hypoxia can reduce the tension of small artery smooth muscle and increase the opening of capillaries through the action of certain physiologically active substances. As a result, cardiac output is reduced, peripheral vascular resistance and systolic blood pressure are reduced, and diastolic blood pressure is not as significant as systolic blood pressure.