Performance assessment of standard algorithms for dynamic R-T interval measurement: comparison between R-T-apex and R-T-end approach

Three automatic approaches to ventricular repolarization duration measurement are compared on computer-generated and real electrocardiography (ECG) signals, in relation to their reliability in the presence of the most common ECG artefacts. The R-T end threshold method performs better than the R-T end fitting, and, hence the latter should be used with caution when R-T end variability is addressed. The R-T apex method is more robust with regards to broadband noise than the R-T end threshold. A high level of broadband noise does not prevent the detection of the central frequency underlying R-T periodical changes.