2002/12/06 by M. Martinis, A. Knežević, Martinis, M. +8
Biochemistry, Genetics and Molecular Biology · Computer Science · Economics, Econometrics and Finance · Physics and Astronomy · #Anomaly Detection Techniques and Applications #Complex Systems and Time Series Analysis #FOS: Biological sciences #FOS: Physical sciences #Medical Physics (physics.med-ph) #Quantitative Biology (q-bio) #Time Series Analysis and Forecasting #physics.med-ph #q-bio
paper · pdf · doi:10.48550/arxiv.physics/0212029
9 pages, LaTex, 4 figures
arxiv created 2002/12/06 · openalex publication_date 2002/12/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The fractal scaling properties of the heartbeat time series are studied in a controlled ergometric regime using the Hurst rescaled range R/S analysis. The long-time "memory effect" quantified by the value of the Hurst exponent H>0.5 is found to increase during progresive physical activity at healthy subjects in contrast to those having stable angina pectoris (SAP), where it is decreasing. We argue that this finding may be used as a useful new diagnostic parameter for short heartbeat time series.