What is altitude sickness? Causes, symptoms and treatment

Updated June 5 2016 - 10:13am, first published May 23 2016 - 8:58am
Maria Strydom, who died on a climb to the summit of Mount Everest, and her husband Robert Gropal.
Maria Strydom, who died on a climb to the summit of Mount Everest, and her husband Robert Gropal.
Maria Strydom was an experienced mountaineer who had successfully climbed Denali in Alaska, Aconcagua in Argentina, Mount Ararat in eastern Turkey and Kilimanjaro in Africa. Photo: Monash University
Maria Strydom was an experienced mountaineer who had successfully climbed Denali in Alaska, Aconcagua in Argentina, Mount Ararat in eastern Turkey and Kilimanjaro in Africa. Photo: Monash University