Climbing Mount Rainier. The<unk>  are considerable. The oxygen saturation of hemoglobin determines the content of oxygen in blood. After the human body reaches around above sea level, the saturation of oxyhemoglobin begins to decrease rapidly. However, the human body has both short-term and long-term adaptations to<unk>  that allow it to partially compensate for the lack of oxygen. There is a limit to the level of adaptation; mountaineers refer to the<unk> s above as the death zone, where it is generally believed that no human body can acclimatize.
Effects of high altitude on humans
Sudden cardiac death of athletes
risks of Hypoxia 
Cold and heat adaptations in humans
risks of Myocardial infarction
risks of Coronary artery disease
Myocardial infarction complications
Pathophysiology of heart failure