At-home ECGs will detect early heart issues and save thousands, say doctors

Colour-coded output from smartwatch device would be easy for public to read

They remain some of the most complex diagnostic procedures carried out by doctors. To take an electrocardiogram, or ECG, they first have to attach 10 or more electrodes to a patient's chest, arms and legs to measure the heart's electrical activity. Then, once these signals have been recorded, a cardiologist has to interpret them to determine if a person has a particular heart ailment.

It is a life-saving technology - but a complicated, expensive one. However, UK scientists now believe they could soon overcome these limitations by developing devices which will allow patients to take their own detailed ECGs at home and be provided with easily interpreted diagnoses about the state of their hearts.