High blood pressure is also known as hypertension. Blood pressure is the amount of force exerted against the walls of the arteries as blood flows through them.
Anyone whose blood pressure is 140/90 mmHg or more for a sustained period is said to have high blood pressure, or hypertension.
Blood pressure is usually divided into five categories:
1. Hypotension, or low blood pressure
Systolic mmHg 90 or less, or
Diastolic mmHg 60 or less.
2. Normal
Systolic mmHg 90-119, and
Diastolic mmHg 60-79
3. Prehypertension
Systolic mmHg 120-139, or
Diastolic mmHg 80-89
4. Stage 1 Hypertension
Systolic mmHg 140-159, or
Diastolic mmHg 90-99.
5. Stage 2 Hypertension
Systolic mmHg over 160, or
Diastolic mmHg over 100.
DIAGNOSIS
People measure two types of blood pressure:
• Systolic pressure: This is the blood pressure when the heart contracts.
• Diastolic pressure: This is the blood pressure between heartbeats.
If you are told that your blood pressure is 120/80 mmHg, it means you have a systolic pressure of 120 mmHg and a diastolic pressure of 80 mmHg.
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