HAPE: The Silent Killer at Ten Thousand Feet High-altitude pulmonary edema (HAPE) is an extremely dangerous form of altitude sickness that can often have fatal consequences. As opposed to acute mountain sickness and high altitude cerebral edema, which are caused by a decrease in oxygen concentration and brain swelling, HAPE is caused by an increase in pulmonary pressure during a significant ascent. While some of their symptoms overlap, […] Climbing Lucy Ferneyhough | November 1, 2018 1 Comment