Heart test
Blood Pressure Test
A blood pressure test measures the pressure of blood in your arteries using an inflatable cuff. It is quick and painless, and helps detect high blood pressure, a major but often silent health risk.
Quick answer
Blood Pressure Test: what it is and what the results mean
A blood pressure measurement records two numbers: the pressure when the heart beats (systolic) and when it rests between beats (diastolic).
- Why it is done: It screens for and monitors high blood pressure (hypertension), which usually has no symptoms but raises the risk of heart attack, stroke and kidney disease, and for low blood pressure causing dizziness.
- Understanding results: Readings are given as "systolic over diastolic" (for example 120/80).
What it is
A blood pressure measurement records two numbers: the pressure when the heart beats (systolic) and when it rests between beats (diastolic).
Why it is done
It screens for and monitors high blood pressure (hypertension), which usually has no symptoms but raises the risk of heart attack, stroke and kidney disease, and for low blood pressure causing dizziness.
What to expect
A cuff is wrapped around your upper arm and inflated, then slowly released while the reading is taken — it takes under a minute and only feels like a brief squeeze. Home and 24-hour monitors are also used.
Understanding the results
Readings are given as "systolic over diastolic" (for example 120/80). What counts as high depends on the setting and your health; a single high reading is often rechecked before any diagnosis.
Good to know
Risks and limitations
The test is completely safe. Because readings vary with stress, activity and even the setting ("white coat" effect), diagnosis usually relies on several readings or home/24-hour monitoring.
Education and reference only. This explains the test in general terms and is not medical advice. Always follow the specific instructions from the team arranging your test, and discuss your results with your clinician.
Answers
Blood Pressure Test: frequently asked questions
What is a normal blood pressure?
For many adults, an ideal reading is around 120/80. What counts as "high" depends on the situation and your overall health, and is best interpreted by a clinician using several readings.
Why does high blood pressure matter if I feel fine?
High blood pressure usually causes no symptoms but silently raises the risk of heart attack, stroke and kidney disease — which is why it is checked and treated even when you feel well.
Related tests
Other heart test investigations
Sources
Where this is drawn from
- NHS — Tests and treatments
- NICE — diagnostic guidance
- Royal College of Radiologists / relevant professional body
Building patient-education content for tests or procedures?
We create clear, accurate, referenced medical explainers and decision aids for teams.