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Symbolic Dynamics, Poincaré Plot Analysis and Compression Entropy Estimate Complexity in Biological Time Series [chapter]

Steffen Schulz, Andreas Voss
2017 Complexity and Nonlinearity in Cardiovascular Signals  
In this chapter prominent complexity methods of non-linear dynamics as symbolic dynamics, Poincaré plot analyses, and compression entropy are introduced and their algorithmic implementations and application  ...  examples in clinical trials are provided.  ...  Poincaré plot is commonly applied to assess the dynamics of HRV [28] [29] [30] and in risk stratification, e.g. for sudden death [26] , in patient suffering from dilated cardiomyopathy [31] , in cardiac  ... 
doi:10.1007/978-3-319-58709-7_2 fatcat:xm6vtqug7rasxkhgys6jd4lauu

Three-Dimensional Segmented Poincaré Plot Analyses SPPA3 Investigates Cardiovascular and Cardiorespiratory Couplings in Hypertensive Pregnancy Disorders

Claudia Fischer, Andreas Voss
2014 Frontiers in Bioengineering and Biotechnology  
In conclusion, SPPA3 could be a useful method for enhanced risk stratification in pregnant women.  ...  The aim of this study was to introduce a new three-dimensional coupling analysis methods -the three-dimensional segmented Poincaré plot analyses (SPPA3) -to establish an effective approach for the detection  ...  For example, SPPA indices derived from beat-to-beat interval time series were able to discriminate between low and high risk patients with dilated cardiomyopathy, which was not possible when applying traditional  ... 
doi:10.3389/fbioe.2014.00051 pmid:25429364 pmcid:PMC4228841 fatcat:dp7z3xdqyrbbbo4tx3icsuv4ya

Nonlinear Methods Most Applied to Heart-Rate Time Series: A Review

Teresa Henriques, Maria Ribeiro, Andreia Teixeira, Luísa Castro, Luís Antunes, Cristina Costa-Santos
2020 Entropy  
We focused on methods based on concepts of chaos, fractality, and complexity: Poincaré plot, recurrence plot analysis, fractal dimension (and the correlation dimension), detrended fluctuation analysis,  ...  We present the description of the methods along with their most notable applications.  ...  In lagged Poincaré plots (lag − c), x(i) is plotted against x(i + c), where c is some small positive integer value. In general, the plot is still clustered around the line of identity.  ... 
doi:10.3390/e22030309 pmid:33286083 pmcid:PMC7516766 fatcat:4p4gzfxrordahkzzyf2d5qs3nu

46th Annual Meeting of the Association for European Paediatric and Congenital Cardiology, AEPC with joint sessions with the Japanese Society of Pediatric Cardiology and Cardiac Surgery Istanbul, Turkey, May 23–26, 2012

2012 Cardiology in the Young  
The aim of this pilot-study was to use an ambulatory short-term ECG system to study the prevalence of arrhythmia and to perform HRV analysis, using Poincare 0 plots.  ...  ECGs were analyzed for rhythm and arrhythmia. Each RR interval was plotted as a function of the previous RR-interval (Poincare 0 plot). Results were presented as SD1, SD2 and the ratio SD1/SD2.  ...  Patients with Down syndrome are at a risk of  ... 
doi:10.1017/s1047951112000509 fatcat:wzo3hegsxrbwtdv5ilo3xr2mzy

Track C

2014 Biomedical Engineering  
The scheme is capable to cope with inappropriately initialized parameter values. In experiments it is validated for two scenarios simulating inappropriate parameter values.  ...  As the determination of suitable and individualized parameter values for myoelectric-controlled human-machine interfaces is time-consuming, this work presents an incremental parameter adaptation scheme  ...  The author would like to thank Christopher Dörr, THM, for helpful discussions and Youssef Belhoucine, THM, for help with ECG recording.  ... 
doi:10.1515/bmt-2014-5002 pmid:25385887 fatcat:duiajlu3i5gdffz5o4extkvyjm

2017 ACVIM Forum Research Abstract Program

2017 Journal of Veterinary Internal Medicine  
Only 1/3 horses not treated with corticosteroids with serial abdominocenteses had improvement in abdominal counts, and 2/2 did not have improvement of eosinophilia.  ...  Two horses were euthanized for colic 1 and 9 months after discharge. Five horses were alive at follow up (2-24 months).  ...  Cardiac diseases especially dilated cardiomyopathies are common in dogs.  ... 
doi:10.1111/jvim.14778 fatcat:lm3hhhjfjvgbvdfm7eib5iq7t4

Proceedings of Reanimation 2022, the French Intensive Care Society International Congress

2022 Annals of Intensive Care  
Rationale: Up to 15% of critically ill patients receive platelets in intensive care units (ICU) (1).  ...  This study aims to describe the efficacy of PT in ICU, and its impact on patients' outcomes.  ...  Compliance with ethics regulations: Yes in animal testing.  ... 
doi:10.1186/s13613-022-01016-6 pmid:35729416 pmcid:PMC9213104 fatcat:cqc275x5inaxdb5jcbcxub3a4u

Posters_Wednesday_14 October 2009

2009 Intensive Care Medicine  
Furthermore, a cut off prognostic value could be determined and used as a means for risk stratification of these patients. INTRODUCTION.  ...  After plotting data in a ROC curve, we found a APACHE II C 20 the best cutoff for mortality. CONCLUSION.  ...  ; and in the creased use of raised headboard of the bed for patients with risk of aspiration pneumonia in 71% of cases.  ... 
doi:10.1007/s00134-009-1599-9 fatcat:z7m6v62eorhmrfwuhzgitmfmbm

Pismo Sekcji Polskiego Towarzystwa Kardiologicznego: PROGRAM I STRESZCZENIA XVII Konferencja Szkoleniowa XIII Międzynarodowa Konferencja Wspólna

Chorób Serca, Elektrokardiologii Kobiet, Nieinwazyjnej, Kardiologii Telemedycyny, Kardiologii Dziecięcej, Kardiologii Eksperymentalnej, Niewydolności Inwazyjnej, Rehabilitacji Serca, Kardiologicznej, Fizjologii Wysiłku, Resuscytacji, Intensywnej Terapii (+1 others)
The collected time series (5 separate 1-minute tracings for each patient) of consecutive AH and HV intervals were analyzed with the variance-based descriptors of the Poincare plot.  ...  Mortality rate was 14.8 % (1 patient with congenital AV block, 1 patient with cardiomyopathy, and 7 patients with low cardiac output state after surgery for congenital heart defect).  ... 

Atrial arrhythmogenesis in a murine model of mitochondrial insufficiency

Haseeb Valli, Apollo-University Of Cambridge Repository, Apollo-University Of Cambridge Repository, Christopher Huang
A putative role for chronic mitochondrial impairment in their pathogenesis was investigated using a murine model with homozygous deficiency of the transcriptional coactivator peroxisome proliferator-activated  ...  Morphometric analysis revealed that Pgc-1β deficiency was associated with accelerated fibrosis, with aged Pgc-1β-/- hearts displaying the greatest fibrotic change.  ...  Selective cardiac knockouts develop AV block, dilated cardiomyopathy and die at 2 -4 weeks (Larsson et al., 1998; Wang et al., 1999) .  ... 
doi:10.17863/cam.41673 fatcat:t7oj2oownrdblmypy5qtlg4t7a