As always, talk to a doctor about this. They will be able to give you a definitive answer.
Hah, asking here because I talked to my doc about it at an appointment today and they couldn't give me an answer. Guess I'm gonna need to find a specialist.
It's been fine and my energy levels are good, and I enjoy the workouts. Just wasn't sure if it was potentially problematic because as you noted, it's a high heart rate for my age. My max HR seems to be around 188-190.