Blood pressure values consist of two numbers. The upper value describes the pressure phase of the heart; the lower value describes the relaxation phase. Understanding your values helps you interpret logs better.
Systolic and diastolic explained simply
In a reading such as 120/80 mmHg, the first number is the systolic blood pressure. The second number is the diastolic blood pressure. Both values matter.
Guide values for adults
| Category | Systolic | Diastolic |
|---|---|---|
| Low blood pressure | below 100 or 110 mmHg | below 60 mmHg |
| Normal blood pressure | 100 or 110 to 129 mmHg | 60 to 84 mmHg |
| High-normal blood pressure | 130 to 139 mmHg | 85 to 89 mmHg |
| High blood pressure | from 140 mmHg | from 90 mmHg |
Why blood pressure values fluctuate
Exercise, stress, temperature, coffee, medication, sleep and measuring position can influence values. Trends are therefore more meaningful than a single reading.
Document your values
Record date, time, blood pressure values, pulse and special circumstances. This makes patterns visible and prepares medical appointments better.
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