Did you mean : Systolic Blood Pressure
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www.webmd.com/hypertension-high-blood-pressure/guide/...

If your blood pressure is elevated -- systolic blood pressure between 120 and 129 or diastolic blood pressure of less than 80 -- your doctor will probably want to check it every 3-6 months.

en.wikipedia.org/wiki/Blood_pressure

Blood pressure is usually expressed in terms of the systolic pressure (maximum during one heartbeat) over diastolic pressure (minimum in between two heartbeats) and is measured in millimeters of mercury , above the surrounding atmospheric pressure.

www.heart.org/en/health-topics/high-blood-pressure/...

Systolic blood pressure (the first number) – indicates how much pressure your blood is exerting against your artery walls when the heart beats. Diastolic blood pressure (the second number) – indicates how much pressure your blood is exerting against your artery walls while the heart is resting between beats.

blood-pressure.emedtv.com/systolic-blood-pressure/systolic-blood...

Systolic blood pressure is the amount of pressure that blood exerts on vessels while the heart is beating. In a blood pressure reading (such as 120/80), it is the number on the top. If the top and bottom blood pressures are both too high, a person is said to have high blood pressure.

www.medicinenet.com/script/main/art.asp?articlekey=16163

For example, with a blood pressure of 120/80 ("120 over 80"), the systolic pressure is 120. By "120" is meant 120 mm Hg (millimeters of mercury). A systolic murmur is a heart murmur heard during systole, the time the heart contracts, between the normal first and second heart sounds.

www.healthline.com/health/high-blood-pressure-hypertension/...

You’ll generally be diagnosed with high blood pressure if your systolic blood pressure reaches between 130 and 139 mm Hg, or if your diastolic blood pressure reaches between 80 and 89 mm Hg.

www.verywellhealth.com/systolic-and-diastolic-blood...

If the systolic blood pressure is lower than normal, systolic hypotension is said to be present. If systolic hypotension is severe enough, it can cause lightheadedness, dizziness, syncope, or (if it lasts long enough), organ failure.

www.cdc.gov/bloodpressure/measure.htm

What Blood Pressure Numbers Mean. Blood pressure is measured using two numbers. The first number, called systolic blood pressure, measures the pressure in your blood vessels when your heart beats. The second number, called diastolic blood pressure, measures the pressure in your blood vessels when your heart rests between beats.

www.diffen.com/difference/Diastolic_vs_Systolic

Diastolic pressure occurs near the beginning of the cardiac cycle. It is the minimum pressure in the arteries when the pumping chambers of the heart — ventricles — fill with blood. Near the end of the cardiac cycle, systolic pressure, or peak pressure, occurs when the ventricles contract. As the ...

www.mayoclinic.org/diseases-conditions/high-blood-pressure/...

It is the most common form of high blood pressure in people older than age 65, but it is possible for younger people to be affected by this type of high blood pressure as well. Doctors now know that high systolic pressure is as important as high diastolic pressure — and even more important in people older than age 50.