hereisanongoingresearcheffortdevotedtocharacterizethesignalregularitymetricsapproximateentropy(ApEn)andsampleentropy(SampEn)inordertobetterinterprettheirresultsinthecontext ofbiomedicalsignalanalysis.Alongwiththisline,thispaperaddressestheinfluenceofabnorma