AMS = Acute Mountain Sickness. I've taken the Sierra Backwoods Medical Course and done a couple 14'ers (including Mt Elbert)...more familiar with edemas and not acronym land...but cie la vie...
Sorry about tossing out the acronym. Be aware, people in Colorado get some instant acclimatization because Denver is at 5k elevation. So after a week there, climbing a fourteener is almost like climbing a 9k peak in Calif.
