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Blood pressure is the tension exerted by blood against the arterial walls. It reaches its
highest values in the left ventricle during systole, and decreases in the arterial system
as the distance from the heart increases, and is lower in capillaries than in arteries.
While the systolic arterial blood pressure rises during activity and lowers during sleep,
the normal, relaxed, healthy adult could have pressure of 100-140 mm Hg. Abnormal or high
blood pressure is a systolic pressure persistently above 140 or diastolic pressure
persistently above 90. When either the systolic pressure is 160+ or the diastolic pressure
is 115+, the elevation is considered severe. Such factors as age, body build, previous
blood pressure, and the state of mental and physical health should be considered when
making a determination.
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![]() High Blood Pressure
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![]() lood pressure varies with
age, sex, altitude, muscular development, and states of mental and physical stress and
fatigue. Women generally have lower blood pressure than men, low in childhood, and higher
in elderly. It can also be affected by diet, hormones, and blood loss due to menstruation
or severe injury. Blood pressure is measured in terms of how much the arteries contract
and dilate. ![]() ![]() ![]() |
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