I'm not sure, but have you (or has he) checked with his cardiologist? If so, what does he/she say? Hope the move goes well and you enjoy your new home!
Connie
I live at near 6000 feet and hike at altitudes up to 11000 feet. While I don't have sents, I do have diagnosed 40-70% blockages in two arteries. There are plenty of people living at these altitudes with stents. It may take a few days to become adjusted to the new elevation, but I don't think there is any reason for concern.