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www.reference.com/article/causes-blood-pressure-60213c71456184b4

Blood pressure is caused by the force of the blood as it pushes against artery walls, according to WebMD. This pressure is measured during the active and resting phases of every heartbeat.

www.reference.com/article/normal-blood-pressure-38dbcc1737764139

According to About.com, normal blood pressure is 120 millimeters of mercury during a heart contraction and 80 millimeters of mercury during relaxation. This results in blood pressure readings in the range of 120/70 to 140/90. Blood pressure readings that surpass that am...

www.reference.com/article/good-high-blood-pressure-e26599e2d082068b

High blood pressure responds well to healthy lifestyle changes, such as cutting back on sodium and alcohol, exercising frequently, quitting smoking and eating a diet full of fresh fruits and vegetables, notes Mayo Clinic. It is crucial to get to an optimal weight and ma...

www.reference.com/article/considered-good-blood-pressure-a56732bd598ac468

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 blood pressure can cause unpleasant side effects, s...

www.reference.com/article/low-blood-pressure-1187ada3b7ccfd23

Low blood pressure, or hypotension, occurs when a person's blood pressure measures below 90 for systolic and 60 for diastolic, according to WebMD. Having just one number below these given figures is enough for a person to have hypotension.

www.reference.com/article/causes-high-blood-pressure-8fcc098e7658cad4

According to Mayo Clinic, primary hypertension, or high blood pressure, has no identifiable causes and develops over time. Medical conditions such as chronic kidney disease, thyroid disease, sleep apnea, congenital blood defects and adrenal gland tumors are causes of se...

www.reference.com/article/healthy-blood-pressure-381b607427584198

According to the American Heart Association, a healthy blood pressure reading is equal to or less than 120 over 80. The top number refers to systolic pressure, which is the pressure against artery walls when the heart pumps. The bottom number, diastolic pressure, repres...