High Blood Pressure
Blood pressure is a measurement of the force exerted against the walls of your arteries as your heart pumps blood to your body. Hypertension is the term used to describe high blood pressure.Blood pressure readings are given as two numbers. The top number is called the systolic blood pressure. The bottom number is called the diastolic blood pressure. For example, 120 over 80 (written as 120/80 mm Hg). One or both of these numbers can be too high. (Note: These numbers apply to people who are not taking medicines for blood pressure and are not ill.)Normal blood pressure is when your blood pressure is lower than 120/80 mm Hg most of the time.High blood pressure (hypertension) is when your blood pressure is 140/90 mm Hg or above most of the time.If your blood pressure numbers are 120/80 or higher, but below 140/90, it is called pre-hypertension. If you have heart or kidney problems, or you had a stroke, your doctor may want your blood pressure to be even lower than that of people who do not have these conditions.