Linear and nonlinear approaches to the analysis of R-R interval variability.

Autumn Schumacher

Research output: Contribution to journalReview articlepeer-review

47 Scopus citations


Analysis techniques derived from linear and non-linear dynamics systems theory qualify and quantify physiological signal variability. Both clinicians and researchers use physiological signals in their scopes of practice. The clinician monitors patients with signal-analysis technology, and the researcher analyzes physiological data with signal-analysis techniques. Understanding the theoretical basis for analyzing physiological signals within one's scope of practice ensures proper interpretation of the relationship between physiolgical function and signal variability. This article explains the concepts of linear and nonlinear signal analysis and illustrates these concepts with descriptions of power spectrum analysis and recurrence quantification analysis. This article also briefly describes the relevance of these 2 techniques to R-to-R wave interval (i.e., heart rate variability) signal analysis and demonstrates their application to R-to-R wave interval data obtained from an isolated rat heart model.

Original languageEnglish (US)
Pages (from-to)211-221
Number of pages11
JournalBiological research for nursing
Issue number3
StatePublished - Jan 2004

ASJC Scopus subject areas

  • Research and Theory


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