title: The effect of electrocardiographic lead choice on RR time series.
abstract: Results of heart rate variability analysis depend on the quality of the initial RR time series that is measured only in one lead of the ECG. This work shows that RR time series can subtly change from lead to lead so the choice of the analyzed lead is another source of uncertainty. The standard deviation of the differences of two RR time series obtained from different leads can change from 0.5 ms to more than 20 ms depending on the amount of noise, the morphological changes of the QRS complexes, the strategies of fiducial point determination and the measured subject. This source of uncertainty is in healthy subjects greater than that associated to the sampling frequency of the ECG for sampling frequencies greater than 400 Hz.
authors.affiliation: Group of Biomedical and Electronic Instrumentation, Department of Electronic Engineering, Technical University of Catalonia, Barcelona 08034, Spain. miquel.angel.garcia@upc.edu
authors.forename: M A
authors.initials: MA
authors.lastname: García-González
authors.forename: J
authors.initials: J
authors.lastname: Ramos-Castro
authors.forename: M
authors.initials: M
authors.lastname: Fernández-Chimeno
mesh_terms: D004562:Electrocardiography / Q000295:instrumentation* / Q000379:methods*; D004566:Electrodes; D006339:Heart Rate; D006801:Humans; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000503:physiopathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity