My boss has sleep apnea and did a sleep study. It turns out he was having roughly 80 episodes an hour where he stopped breathing. They also found that his heart rate was jumping up to 135 bpm during these episodes, as well as his cortisol levels rising way above normal.

I would say it is probably good to know the severity of the condition, as it might be good to know how treatment might need to be. Having your heart rate spike like that is not good, and it means that he will have more monitoring and checking in with his doctor as he adjusts to and uses his CPAP machine.