官网地址bwin:The blood pressure is the pressure of the blood within the arteries. It is produced primarily by the contraction of theheartmuscle. Its measurement is recorded by two numbers. The first (systolic pressure) is measured after the heart contracts and is highest. The second (diastolic pressure) is measured before the heart contracts and lowest. A blood pressure cuff is used to measure the pressure. Elevation of blood pressure is called "hypertension".
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