New data identifies two key risk factors for high-altitude pulmonary edema, a leading cause of death on the mountain.

High altitude pulmonary edema, or HAPE, is a progression of the breathlessness feeling. It is caused by a dilation of blood vessels in the lungs to allow more oxygen to flow. If the blood vessels leak ...

There are two other severe forms of altitude illness, High Altitude Cerebral Edema (HACE) and High Altitude Pulmonary Edema (HAPE). Both of these happen less frequently, especially to those who are ...

One victim was trying to become the oldest woman to climb Indonesia's seven highest peaks. Three other climbers in their ...