New guidelines released this past fall by the American College of Cardiology and the American Heart Association have changed the way you should be looking at your blood pressure numbers. High blood pressure is now defined as 130/80 and higher, which differs from the older definition of high blood pressure as 140/90 or higher. But, what exactly is blood pressure, and what do these numbers mean? Blood pressure is the pressure blood puts on the walls of blood vessels as it circulates through … [Read more...] about Blood Pressure: Understanding the Numbers