Robust projective filtering of time-warped ECG beats.
In this paper a new version, more immune to noise, of the nonlinear projective filtering is presented. The method employs an algorithm of robust principal component analysis to signal subspaces construction and as a result it achieves high performance in real electromyographic noise environment. Two aspects of the method's action are investigated: its ability to suppress noise and its influence on the precision of the QT interval measurement. Then the method influence on evaluation of the beat-to-beat variability of the repolarization duration is presented. A comparison to the previous versions of the nonlinear projective filtering and to the classical linear one is carried out.
Kotas
M
M
Institute of Electronics, Silesian University of Technology, Akademicka Street 16, 44-100 Gliwice, Poland. mkotas@polsl.pl
D000465:Algorithms; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography / Q000295:instrumentation* / Q000379:methods; D006339:Heart Rate; D006801:Humans; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D013997:Time Factors