Multifractality in heartbeat dynamics in patients undergoing beating-heart myocardial revascularization

Computers in Biology and Medicine
Jus KselaJurij Matija Kalisnik

Abstract

The multifractal approach of HRV analysis offers new insight into the mechanisms of autonomic modulation of the diseased hearts and has a potential to depict subtle changes in cardiac autonomic nervous control not revealed by conventional linear and non-linear analyses in various conditions like heart failure or stable angina pectoris. The aim of this study was to employ the multifractality approach in cardiac surgery patients and evaluate the multifractality before and after beating-heart myocardial revascularization (off-pump CABG). Twenty-four hour Holter recordings were performed pre- and postoperatively in 60 patients undergoing off-pump CABG. Selected conventional time- and frequency-domain linear HRV indices were calculated from the 24h and 5 min ECG segments, and preselected multifractal parameters τ(q=2), τ(q=3), h_top and Δh were determined for daytime (12:00-18:00) and nighttime (00:00-06:00) periods of the ECG recordings using Ivanov's method. Mean differences over time were tested using paired-samples t-test and exact Wilcoxon matched-pairs test. The results are reported as mean ± SD and median with interquartile range. A p value of <0.05 was considered statistically significant. All selected conventional linear HR...Continue Reading

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Sep 4, 2014·International Journal of Cardiology·Jus KselaJurij Matija Kalisnik

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Citations

Nov 5, 2016·Nature Reviews. Cardiology·Gabriella CapturJames C Moon
Jan 29, 2019·Frontiers in Neuroscience·Tijana Bojić

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