Don’t most potential climbers get physicals first? Considering that a number are wealthy, why not choose to do a full head to toe check including MRI and CTSCAN before and after. That could provide good information for comparisons. I wonder if any place in Pakistan has an excellent Radiology department to do these tests? Thus getting the best results as close as possible to getting off the mountain.
I would suspect that any rational peoson would be certain of good health before attempting such a climb. Heck, even getting to Everest in the first place is no pleasure cruise.
However, I’ll bet that a goodly percentage of people making the attempt don’t get past one of the lower-altitude base camps before deciding they don’t have the physical stamina to attempt the summit.