Transient raised BP fits with transient raised pulse rate as both are mediated by the release of adrenaline when you see the doc.
As an AME, my pilots often have raised BP with me, yet if my nurse checks it's normal.
What is interesting is how often this happens, and im sure it's related to the personality type of pilots.
We like being in control, and having all the cards, when we go to the AME ( even when I go for my class 2) we are not in control anymore, and that's stressful, which causes release of which chemical?