Hypertension is the medical term for a condition in which the arterial blood pressure is consistently above the normal range. A blood pressure reading consists of two numbers. The number at the top represents systolic pressure. This is the amount of pressure that the heart generates when pumping blood out through the arteries. The number below represents diastolic pressure. This is the amount of pressure in the arteries when the heart is at rest, in between beats. When the reading is above the 140 (systolic)/90 (diastolic) range, it denotes hypertension.
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