HAPE: Acronym for High Altitude Pulmonary Edema, the accumulation in the lungs of extravascular fluid (fluid outside of blood vessels) at high altitude, a consequence of rapid altitude ascent, especially when that ascent is accompanied by significant exercise. HAPE leads to dyspnea (shortness of breath), cough, tachycardia (fast heart rate) and dec... Found on http://www.medterms.com/script/main/art.asp?articlekey=19529