Systolic blood pressure values above 120 and diastolic blood pressure values above 80 are considered high, according to WebMD. Values between 120 and 139 for systolic, and 80 and 89 for diastolic blood pressure, indicate... More » Health Medical Ranges & Levels

People with close blood relatives who have a history of high blood pressure are more likely to develop the condition, reports the American Heart Association. Old age, gender, a sedentary lifestyle, an unhealthy diet and ... More »

The majority of those afflicted by high blood pressure, which is also called hypertension, experience no symptoms at all, even when blood pressure reaches dangerous levels. Those who do experience symptoms may have chest... More »

A person has high blood pressure when the systolic pressure reading is 140 or above and the diastolic pressure is 90 or above, according to WebMD. Both numbers need not be over the limit, as one or the other indicates hi... More » Health Medical Ranges & Levels

A blood pressure reading of 150 over 100 millimeters of mercury indicates that a person may have severe hypertension, according to Mayo Clinic. A physician takes at least two-to-three blood pressure readings before she d... More »

A blood pressure reading below 120/80 mm Hg is a good blood pressure reading, according to the National Heart, Lung, and Blood Institute. Low readings are usually best, but the American Heart Association warns that low b... More » Health Medical Ranges & Levels

The result of blood pressure dropping to 54/20 millimeters of mercury depends on the previous blood pressure level and why the reading dropped, reports the American Heart Association. Nothing may happen, or a person's he... More » Health Medical Ranges & Levels