High altitude creates a hypoxic state with increased oxidative stress activity, causing vascular endothelial dysfunction, which can also activate sympathetic nerves, leading to increased blood pressure.
With the increase in altitude, the oxygen content is relatively low, and oxygen cannot enter the alveoli for a short period of time, which makes the cardiac output increase, and the oxidative stress activity is activated, resulting in vascular endothelial dysfunction, intima-media thickening, and vascular remodeling, which cause the blood pressure to rise.
In addition, the hypoxia of the high altitude state leads to a further increase in sympathetic nerve activity and an increase in plasma norepinephrine secretion, resulting in vasoconstriction and further elevation of blood pressure.
Therefore, people living at high altitude for a long time may have elevated blood pressure, and if they are found to have high blood pressure, they should seek medical attention in time to avoid the occurrence of various complications.