12-Lead ECG

What is a 12-Lead ECG

An ECG (electrocardiogram) is a test that records the electrical activity of your heart, including the rate and rhythm. It's usually quick and painless.

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Electrocardiogram (ECG)

You’ll usually have an ECG (electrocardiogram) if a doctor or healthcare professional thinks you’re having symptoms of:

  • a heart attack
  • coronary heart disease
  • problems with how quickly or regularly your heart beats (arrhythmia)

You also may have an ECG:

  • if you’ve been diagnosed with a heart condition or another condition that affects how well your heart works
  • before and while taking certain medicines

A 12 lead ECG is very safe and painless

  • Possible minor effects:
    Mild redness or irritation from the adhesive electrodes, especially if you have sensitive skin.

  • You will be asked to lie flat and remain still.
  • 10 electrodes are placed on the chest, arms, and legs to generate 12 electrical views (leads) of the heart.
  • The machine records heart rhythm and electrical conduction over seconds.
  • The test is painless and typically completed within 5–10 minutes.

  • Avoid using lotions, oils, or creams on your chest beforehand, as these can affect electrode contact.
  • Chest hair may need to be trimmed or shaved to ensure good contact with the electrodes.
  • Remaining still, relaxed, and quiet during the recording helps produce clear results.
  • Results are interpreted by a clinician alongside your symptoms and medical history.

How to use our services

You can be seen through the NHS or as a private patient. You’ll need a referral first, and we’ll check it to make sure this service is right for you.

NHS Referral Going Private

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