Thanks for writing in.
I am a qualified and certified cardiologist. I read your mail with diligence.
If it was the only episode brought on by exertion and your worry is why it took so long to settle to your usual heart rate
then it is not serious. For normal heart ranges between 60-90. With exercise it can go up to 150 and in someone who is taking drugs for blood pressure the coming down of heart rate can be slow (by your version it would have reached 90 in about 20 minutes) it is OK. If heart rate, without exertion or coffee or any stimulant goes to 150, I would be concerned enough to suggest to you get investigated. If you have had chest pain
, black outs then also it is matter of serious concern. In absence of all this I will let it pass. Good Luck.
With Best Wishes
Dr Anil Grover