President Fords historic trip and fall down the steps of Air Force One. 1  People & Blogs. 2  Standard YouTube License.
The bottom number, called the diastolic pressure, is the measurement as the heart relaxes between beats. Normal blood pressure is a systolic pressure of less than 120 millimeters of mercury (mm Hg) and a diastolic pressure of less than 80 mm Hg, or 120/80 mm Hg, according to the American Heart Association (AHA). Having a blood pressure greater than 140/90 mm Hg is considered high blood pressure or hypertension. A blood pressure level between normal and hypertension, is called prehypertension, meaning it is higher than normal, but not high enough to be considered hypertension.
The normal blood pressure is between 90/60 mmHg and 130/80 mmHg. You can term a blood pressure reading of 90 mercury (mm Hg) or less systolic blood pressure or 60 mm Hg or less diastolic blood pressure, as a case of hypotension. [ Read: Symptoms Of Anemia In Children ]