Short- versus long-term ECG recordings for the assessment of non-linear heart rate variability parameters after beating heart myocardial revascularization

  • Authors:

  • Jus Ksela;Jurij Matija Kalisnik;Viktor Avbelj;Gaj Vidmar;Piotr Suwalski;Grzegorz Suwalski;Kazimierz Suwalski;Borut Gersak

  • Affiliations:

  • Department of Cardiac Surgery, University Clinical Center Maribor, Slovenia;Department of Cardiovascular Surgery, University Medical Center Ljubljana, Slovenia;Department of Communication Systems, Jozef Stefan Institute, Ljubljana, Slovenia;Institute for Rehabilitation, Republic of Slovenia, Ljubljana, Slovenia and Faculty of Medicine, University of Ljubljana, Slovenia;Department of Cardiac Surgery, 1st Chair of Cardiology, Medical University of Warsaw, Poland;Department of Cardiac Surgery, 1st Chair of Cardiology, Medical University of Warsaw, Poland;Department of Cardiac Surgery, 1st Chair of Cardiology, Medical University of Warsaw, Poland;Department of Cardiovascular Surgery, University Medical Center Ljubljana, Slovenia

  • Venue:
  • Computers in Biology and Medicine
  • Year:
  • 2009

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Abstract

Non-linear analyses of heart rate dynamics reveal subtle changes not evident from conventional heart rate variability measures. Traditionally, the information was inferred from 24-hour ECG recordings, making it less suitable for clinical application. Moreover, only few studies have attempted to evaluate the reliability of non-linear analyses in relation to varying proportion of artifacts in tracings. In 67 patients revascularized with beating-heart technique, fractal dimension and detrended fluctuation analyses were obtained from 24-hour Holter and 15-minute high-resolution ECG recordings pre and postoperatively. We found strong correlations of non-linear indices between 24-hour and 15-minute recordings (0.54-0.77, p