I agree.

My ex used to go to the blood bank regularly to donate plasma. He would sit down and they would always say his BP was too high. He would close his eyes and imagine playing 18 holes of golf on a beautiful green tree-lined course. In five minutes, his BP was down enough to donate. So, he "psyched" himself down to normal blood pressure.

You can also lower your BP by petting your favorite pet.

So, yes, there is a mind-body connection.