When high blood pressure needs a cardiologist
Most high blood pressure can be managed well in primary care.
That is important to say first. Hypertension is common, and many people do not need a specialist appointment to get good treatment.
But there are situations where a cardiology or hypertension assessment adds value.
The key is not simply how high the number is. It is the pattern, the context, and whether there are signs that blood pressure is affecting the heart, kidneys, brain or blood vessels.
When specialist assessment is useful
A specialist review is worth considering when blood pressure is:
- difficult to control despite several medications
- very high
- found at a young age
- associated with symptoms
- linked with possible heart or kidney effects
- unusual in pattern
- high during pregnancy or after pregnancy
- suspected to have a secondary cause
It is also useful when there is uncertainty about the diagnosis: for example, possible white coat hypertension, masked hypertension or unusual overnight readings.
Resistant hypertension
Resistant hypertension usually means blood pressure remains above target despite treatment with three appropriate medications, often including a diuretic.
Before adding more treatment, the basics need checking:
- Is the diagnosis correct?
- Are readings being taken properly?
- Is the average high at home or on ABPM?
- Is medication being absorbed and tolerated?
- Are there lifestyle drivers such as sleep apnoea, alcohol, salt, weight or pain?
- Is there an underlying secondary cause?
Sometimes the apparent resistance is not resistance at all. It is measurement error, white coat effect, missed sleep apnoea, medication timing, or a driver that has not been addressed.
Young-onset hypertension
High blood pressure in a younger person deserves more thought.
Most hypertension is primary, meaning there is no single underlying cause. But younger onset increases the need to consider secondary causes such as kidney disease, hormonal causes, coarctation of the aorta, medication effects or sleep apnoea.
The aim is not to over-investigate everyone.
It is to avoid missing the cases where treating the cause changes the whole pathway.
Evidence of organ effects
High blood pressure can affect the heart long before symptoms appear.
An ECG may show signs of strain or thickening. An echocardiogram can assess left ventricular hypertrophy, heart function, valve disease and other structural findings. Blood and urine tests can look for kidney effects.
If there is evidence of organ damage, blood pressure management becomes more than number control. It becomes risk reduction.
What a cardiology hypertension assessment may include
Depending on the situation, assessment may include:
- careful clinic blood pressure measurement
- 24-hour ambulatory blood pressure monitoring
- review of home readings
- ECG
- echocardiography
- blood and urine tests
- cardiovascular risk assessment
- medication review
- assessment for secondary causes - especially looking for coarctation of the aorta
- advice on lifestyle drivers such as salt, alcohol, weight, exercise and sleep
The goal is to understand the pattern before escalating treatment.
When it may be urgent
Seek urgent medical help if very high blood pressure is associated with chest pain, severe breathlessness, neurological symptoms, confusion, collapse, severe headache with concerning features, new visual disturbance, or symptoms in pregnancy.
Those situations should not wait for a routine outpatient appointment.
The main point
High blood pressure is common, but it is not always simple.
Most people can be managed well by their GP. Specialist assessment is most useful when the pattern is resistant, severe, young-onset, uncertain, or already showing signs of harm.
The best treatment decision starts with the right diagnosis.
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