Pulmonary hypertension

Also called PH or Pulmonary arterial hypertension

Pulmonary hypertension is high blood pressure in the blood vessels that supply the lungs. It makes the right side of the heart work harder, which can weaken it over time. It is often linked to other conditions, such as heart or lung disease or previous blood clots, but sometimes the cause is not known.

Last updated Nov 9, 2026

What it is

It is a long-term condition that usually gets worse over time, but treatment can help with symptoms and slow it down.

Treatment depends on the cause and may include medicines to widen blood vessels, blood thinners, diuretics and oxygen. Some people need surgery or a transplant.

Common signs

  • Shortness of breath, especially with activity
  • Tiredness
  • Feeling faint or dizzy
  • Chest pain
  • A racing heartbeat
  • Swelling in the legs, ankles or tummy

How it is usually diagnosed

  • Echocardiogram
  • Blood tests and ECG
  • Lung function tests and scans
  • Right heart catheterisation

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Echocardiogram reports
  • Right heart catheter results
  • Lung function and scan reports
  • Specialist centre letters
  • Medicine lists

Questions to ask your doctor

  • What is causing my pulmonary hypertension?
  • Which treatments would help me?
  • How much activity is safe for me?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Chest pain, fainting, coughing up blood or severe breathlessness: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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