A system for comprehensive comparison of serial ECG beats and serial ECG recordings

Quantitative analysis of serial ECG records is the most challenging requirement for computer electrocardiography. A short review on ECG variability is given. It is explained in which way the HES ECG analysis program has been extended to visualize and quantify ECG beat to beat and record variability. New features such as computation of standard error figures and confidence intervals for measurements have been embedded into the HES ECG analysis program. By means of these features data are available to support appropriate statistical testing of serial ECG recordings. Also, a statistical model is briefly described for estimation of the sources of variance in multiple serial recordings.