Originally Posted By: Harvey Lankford
...Hypoxia-Inducible Factor (HIF) whether from high altitude or lack of blood flow in subacute coronary occlusion stimulates angiogenesis (new blood vessel growth)
Thanks for that info. Have often wondered about how the heart/body is triggered to generate new blood vessel growth.

And thanks for all the info you've shared over the years with acclimatization. A couple of years ago on Kilimanjaro, the night before we summitted, the O2 saturation level of our party of six was tested after dinner (as per the guide company's protocol). I was amazed that everyone's, including 3 of the party who were newbies, measured in the mid 90's. I attributed it to our slow, methodical ascent and the daily use of diamox.