What Is It?
Blood pressure has two components:
Blood pressure is measured in millimeters of mercury (mmHg). So blood pressure would be expressed, for example, as 120/80 mmHg.
High blood pressure is diagnosed when one or both of these numbers is too high. High blood pressure is also called hypertension.
Blood pressure is categorized as follows:
Normal: Less than 120/80 mmHg
Prehypertension: 120/80 to 139/89 mmHg
Stage 1 hypertension: 140/90 to 159/99 mmHg
Stage 2 hypertension: 160/100 mmHg and above
Usually, systolic pressure increases as we age. However, after age 60, diastolic pressure usually begins to decline.
Prehypertension is not a disease—yet. But it does mean you are at increased risk for developing high blood pressure.
Why worry about high blood pressure? High blood pressure can damage many organs, including the:
Hypertension increases your risk of heart attack, stroke, and kidney failure.
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