Falluntersuchungen zur nicht-linearen Dynamik der Arrhythmia absoluta

Atrial fibrillation does not present a uniform extent of variability of the ventricular response exemplifying periodicities and more complex fluctuations, due to varying number and shape of atrial wavelets and aberrant conduction in the AV-junction. It was sought to categorise different degrees of complexity introducing an uncomplicated monitoring method for that objective. The fluctuation of RR-intervals was investigated in patients presenting with atrial fibrillation using conventional statistical methods as well as methods derived from non-linear dynamics. Specifically Poincaré-Plots were employed to analyse the data. Statistical methods were shown to describe the dynamics not adequately due to noise in the acquired data as well as owing to intrinsic qualities of the data sets. Namely non-uniformly distributed data and trends constituted limitations of statistical methods. Poincaré-Plots were proven to be a inexpensive, effective method to categorise the complexity of the ventricular response in atrial fibrillation. Periodical variation of interval lengths could be differentiated from continuos variation in the considered data sets. The latter could be shown to exemplify either stochastic fluctuation or complex non-linear dynamics of RR-interval variation. Poincaré-Plots provide a means to appreciate different degrees of complexity of RR-interval-fluctuation semi-quantitatively without being effected by contaminated or inconsistent data. For a complete visualisation of the concerned dynamics relatively small data sets suffice. Thus, it is possible to observe the pattern of fluctuation essentially in real time which makes them ideally suited for future investigation

Author dc:creator

• Wiese, Stefan

Contributors dc:contributor

• Kalff, Günter
• Schmid-Schönbein, Holger

• info:eu-repo/classification/ddc/610
• Atrial fibrillation
• Poincaré-plot
• complexity analysis
• ventricular response
• Medizin

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-094823%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A56085