Hello,
Thanks for writing to Health Care magic, I am Dr , Muhammad Ahmad , I have read your question closely, I understand your concern and will be helping you with your health related problem.
These readings are quite good as far as BP is concerned , you only concern here seems to be the changes in number of heart beats per minutes before it was 110 and now it is seventy.
Well if there is an abrupt change from 110 which has been regular since years and now it is 60, then this should be checked through a
stress test in my opinion, specially if there are symptoms like palpitations,
chest pain,
shortness of breath on exertion and black out or being light headed. You should meet your doctor and discuss a stress test.
Other reasons of change in evening
heart rate is change in life style or a habit.
Like may be he used to take coffee tea or any other heart stimulant like coffee, caffeine , energy drink, cigarette etc which he doesn't take or it is not more affecting him the same way. He wasn't taking enough water during his work but now he is, stress,
fever, pain, fear everything causes heart rate changes. If stress test is fine then there is nothing to worry about.
I hope this answered your question, If you have more queries I am happy to answer you.
Regards.
Dr.Muhammad Ahmad