The ten-second 12-lead electrocardiogram (ECG) is the most commonly used tool for non-invasive cardiac assessment. Although many paper based methods in healthcare have been made redundant, the 12-lead ECG continues to be printed on standard graph paper. The reliance on paper as a medium to visualise the ECG means that collaboration and the sharing of data is not as straightforward. The limited resolution of the printed ECG has also, in the past, made it difficult to accurately measure intervals and amplitudes. These drawbacks provide rationale for research into alternative computer based interfaces that are more usable and intuitive to clinical staff.