I’m surprised you were take off Eliquis if you had blood cloths and Fac5Leiden Clotting gene. I had an extensive blood clot, and have the gene and my hematologist told me that I had to take it the rest of my life. I have no idea how higher altitude would affect that, but I don’t understand why you were taken off of the Eliquis, since you have the Fac5leiden gene. I think maybe a second opinion might be a good idea. Good luck.