Acute mountain sickness (AMS) and high altitude cerebral edema
(HACE) represent a continuum of one form of such illness.
High altitude cerebral edema
(HACE) is an advanced and potentially fatal form of mountain sickness.
Severe consequences include high altitude pulmonary edema and high altitude cerebral edema
, which are both medical emergencies.
Acute mountain sickness, if left untreated, may get complicated by the development of High Altitude Cerebral Edema
(HACE)5 which is potentially fatal.
In moderate--to high-risk situations of AMS such as prior history of AMS and climbing over 2500-2800 m in 1 day, rapid ascent above 2800-3500 m and increase in sleeping elevation more than 500 m/24 hours above 3000 m, a prior history of high altitude pulmonary edema (HAPE) or high altitude cerebral edema
(HACE) pharmacological prophylaxis may be considered as an addition to gradual ascent [4,6].
52% patients had Acute Mountain Sickness, 12% hypertension, 10% High altitude cerebral edema
, 8% Tension type headaches, 6% Dural venous sinus thrombosis, 6% migraine, 2% encephalitis, 2% were of Subarachnoid hemorrhage and 2% patients Hydrocephalus.