The lowest level of blood pressure measured in the main arteries. Diastolic pressure is the pressure between heartbeats when the ventricles are relaxed and filling with blood. Systolic pressure, the highest level of blood pressure in the arteries, occurs when the ventricles contract. The normal range varies with age and between individuals, but a young adult usually has a diastolic pressure of about 80 mmHg (mm of mercury) and a systolic pressure of around 120 mmHg. A persistently high diastolic pressure occurs in most cases of hypertension.
Diastolic pressure |
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