High blood pressure, also known as arterial hypertension, is a chronic condition in which the pressure within the arteries remains persistently elevated. Often referred to as the ‘silent killer’, high blood pressure may remain symptom-free for a long time while gradually damaging the blood vessels and heart. If left untreated, it can lead to serious health problems, including heart attack, stroke and kidney disease. Early detection and appropriate treatment are crucial for reducing the risk of complications and maintaining overall health.
Possible symptoms of high blood pressure
High blood pressure often causes no noticeable symptoms. However, some people may experience:
- Headache
- Dizziness
- Nosebleeds
- Tinnitus (ringing in the ears)
Signs of possible organ damage may include:
- Visual disturbances
- Shortness of breath
- Chest pain
- Dyspnoea (breathlessness)
Over time, untreated high blood pressure can lead to severe health complications such as cardiovascular disease, stroke and kidney damage. Regular blood pressure monitoring at home is important for detecting hypertension early and taking appropriate action.
How is blood pressure measured?
High blood pressure is usually identified during a medical examination or through regular monitoring with a home blood pressure monitor. Blood pressure can also be measured with a smartphone.
Two values are measured:
- Systolic pressure: the higher value, measuring pressure in the arteries when the heart contracts
- Diastolic pressure: the lower value, measuring pressure in the arteries between heartbeats when the heart relaxes
A blood pressure reading of 120/80 mmHg is considered normal.
What is healthy blood pressure?
Healthy blood pressure is generally around 120/80 mmHg. Readings below 120/80 mmHg are classed as optimal, 120/80–139/89 mmHg is classed as borderline or prehypertensive, and 140/90 mmHg or higher is classed as high blood pressure (hypertension).
A diagnosis of prehypertension or hypertension should only be made after several measurements taken on different days. A single elevated reading is not sufficient for diagnosis. To confirm a diagnosis, 24-hour ambulatory blood pressure monitoring may be recommended.
Regular check-ups are important for identifying changes in blood pressure early and initiating treatment when necessary.