Education for families living with congenital heart conditions

A guide for parents

Having an ECG

Your Journal

Before, during and after

Follow your own hospital team’s instructions about medicines and eating or drinking; these can be different for each child.

Before
Explain that small stickers will record the heart’s electrical signals.
During
Sensors are placed on the skin while your child rests still.
After
Staff remove the stickers. Ask when you’ll hear about the results.

01

What the test tells the team

An ECG recording machine on a trolley, with a screen and controls.
An example ECG machine that records the heart’s electrical signals.Rooms and equipment vary between hospitals.Photo: Ibrahim Husain Meraj · CC BY-SA 4.0

An electrocardiogram, usually called an ECG, records the heart’s electrical activity. It helps the doctor check how fast the heart beats and whether the beats follow a regular pattern. It is different from an echo, which makes moving pictures of the heart. An ECG may not answer every question. The team looks at it together with your child’s examination and other test results.

02

What happens next

What your child may notice

A member of staff places small sticky sensors on the skin and connects them to a recording machine. Your child is asked to lie still so movement does not interfere with the recording. The machine reads signals rather than sending a shock into the body. The test is generally quick and painless. Removing the stickers may feel uncomfortable.

The skin may be sore or itchy for a short time.

Preparing for the visit

Ask staff to show a spare sticker first if that would help. Tell staff if sticky plasters irritate your child’s skin. Explain if touch, noise or showing their chest worries them. Clothing that opens easily may make the visit simpler. Follow the appointment letter and ask whether other tests are booked on the same day.

Before leaving, ask who will read the recording and when you should get the result. Check who to contact if you do not hear back.

03

Questions to ask

Save the questions you want to take to your next appointment. You can edit them in your Journal.

  • What are you hoping to find out from this ECG, and how will it help with our child’s care?
  • Will our child have any other tests today, and what should we expect during the visit?
  • When will the ECG result be available, and who will explain it and any next steps to us?
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Sources and review

Sources checked 9 October 2026. Independent clinical review pending.