30 years ago I went for my initial class 1 and my blood pressure was high. After a bit of a lie down it dropped to acceptable levels and the class one was issued. Needless to say every time I go to the doc's for a medical the bp is high. But readings at home a good. Some 30 years later I've had to go onto bp medication and now bp at doc's and home is very good. So the morel of the story is don't worry. As long as you have a class one the airlines don't really care about your bp. As I side note I told my airline I am now on bp tablets and they've been more than helpful in a number of ways. Even offered no earlies. Tempting as it is I'm happy to keep a normal roster pattern.