Cardiac Inherited Diseases Service
Public Service, Cardiology, Paediatrics
An ECG is a recording of the heart's electrical activity. Electrode patches are attached to the skin to measure the electrical impulses given off by the heart. It is not painful and takes about ten minutes. The result is a trace that can be read by a doctor. It can give information about risk of heart rhythm disturbance - such as the length of the QT interval.