Blood is carried from the heart to all the body's tissues and organs in pipes, called arteries and veins. Blood pressure is the force of the blood pushing against the walls of those pipes. The unit for measuring blood pressure is millimeters of mercury (mmHg).
In most people, hypertension, or high blood pressure, is defined as either:
- a systolic pressure consistently at 140 or higher or
- a diastolic pressure consistently at 90 or higher.
In some groups, such as those with diabetes or kidney disease,...