Christie is right about the blood pressure but the heart doesn't necessarily stop beating during a heart attack.
--J
Initially, your pressure can rise from the pain, but then it may fall from inefficient pumping of the heart.
I am no Doctor, and am just guessing along logical thoughts, but when you have a hear attack, your heart generally stops beating (thats why you die) and when your heart stops pumping then you have no blood pressure. Therefore I assume that your blood pressure drops during an attack. But good question, anyone know for a fact?
Yes your blood pressure rises due to the pain.