Vital signs
Blood Pressure - Diastolic
LOINC 8462-4 · mmHg
Ranges
Reference range: 60–80 mmHg
What it is
Diastolic blood pressure is the lower number — the pressure in your arteries between heartbeats, while the heart rests and refills.
Why it matters
Together with the systolic number, it is a core measure of cardiovascular health and risk.
What high values can mean
A higher value contributes to a diagnosis of high blood pressure, which strains the heart and arteries over time.
What low values can mean
A lower value is often fine, but a very low reading with dizziness can matter.
How to improve it
Regular activity, less salt, a healthy weight, limiting alcohol, managing stress and any prescribed medication help control it.
Food & lifestyle
A diet rich in vegetables, fruit and whole grains with less salt and alcohol supports healthy blood pressure.
Preparing for the test
Sit and rest 5 minutes, feet flat, arm supported; avoid caffeine and exercise just before measuring.
When to talk to a doctor
Discuss consistently high readings with a doctor; seek care for very high readings with symptoms.
Related markers
Sources
- American Heart Association
- MedlinePlus (NIH)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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