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Wolff-Parkinson-White syndrome

Also called WPW syndrome or Pre-excitation syndrome

Wolff-Parkinson-White (WPW) syndrome is when there is an extra electrical connection in the heart, present from birth. This can cause episodes of a very fast heartbeat (supraventricular tachycardia). Many people have no symptoms and it is found on an ECG by chance. Episodes often start in childhood or early adulthood.

Last updated Nov 9, 2026

What it is

Some people need no treatment. Others take medicines or have catheter ablation, which can usually cure it by destroying the extra pathway.

Rarely, WPW can cause a dangerous heart rhythm, so a heart specialist will assess the risk.

Common signs

  • A sudden fast or pounding heartbeat
  • Feeling dizzy or lightheaded
  • Shortness of breath
  • Chest pain
  • Fainting

How it is usually diagnosed

  • ECG
  • A heart monitor worn for days
  • Electrophysiology study

Records worth keeping

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

  • ECG recordings
  • Heart monitor reports
  • Cardiology letters
  • Ablation procedure notes

Questions to ask your doctor

  • Do I need treatment?
  • Would ablation suit me?
  • Are there activities I should avoid?

When to get help right away

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

  • A fast heartbeat with chest pain, fainting 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.

Sources

Related conditions

Supraventricular tachycardia (SVT)Episodes of an abnormally fast heartbeat that start and stop suddenly. It is usually not dangerous and can be treated.ArrhythmiaA heartbeat that is irregular, too fast or too slow. Many are harmless, but some need treatment.