July 29, 2006 Hour Two: High blood pressure, pulse pressure and the risk of heart attacks.

You've heard about blood pressure, but what about something called pulse pressure?  According to a new study, if your pulse pressure is high, you may be at a much greater risk of heart attack. We'll also explain why blood pressure goes down at night. We'll discuss new research that indicates there may be a link between migraine headaches and heart disease. Plus, we'll share a way runners can try to beat the heat. Dr. Cooper takes calls.