ACUTE MOUNTAIN SICKNESS (參考資料 uptodate )
通常是以海拔 2500 公尺以上算高海拔, 但在海拔 2000 公尺也有AMS案例報告.
在海拔 2400 公尺以上, 急性高山病 AMS 通常在6-12 小時內發作, 但也有一些案例是在到達高海拔一小時內, 或 24 小時才發作.
Acute mountain sickness (AMS) is the most common of the altitude diseases; it occurs in approximately 40 to 50 percent of people who live at a low altitude and sleep at an altitude above 10,000 feet (3000 m), and in approximately 25 percent of those sleeping above 8000 feet (2400 m). Some people can develop AMS as low as 6500 feet (2000 m).
Symptoms usually occur within 6 to 12 hours of arrival at altitudes above 8000 feet (2400 m). Symptoms can begin as soon as one hour or as long as 24 hours after arriving. AMS does not occur after adjusting to a given altitude for three or more days.