Ontological fuzzy agent for electrocardiogram application

Authors:
Chang-Shing Lee;Mei-Hui Wang
Affiliations:
Department of Computer Science and Information Engineering, National University of Tainan, Tainan 700, Taiwan;Department of Computer Science and Information Engineering, National University of Tainan, Tainan 700, Taiwan
Venue:
Expert Systems with Applications: An International Journal
Year:
2008

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Abstract

The electrocardiogram (ECG) signal is adopted extensively as a low-cost diagnostic procedure to provide information concerning the healthy status of the heart. However, the QRS complex must be calculated accurately before proceeding with the heart rate variability (HRV). In particular, the R peak needs to be detected reliably. This study presents an adaptive fuzzy detector to detect the R peak correctly. Additionally, an ontological fuzzy agent is presented to process the collection of ECG signals. The required knowledge is stored in the ontology, which comprises some personal ontologies and predefined by domain experts. The ontological fuzzy agent retrieves the ECG signals with R peaks marked for HRV analysis and ECG further applications. It contains a personal fuzzy filter, an HRV analysis mechanism, and a fuzzy normed inference engine. Moreover, the ECG fuzzy signal space and some important properties are presented to define the working environment of the agent. An experimental platform has been constructed to test the performance of the agent. The results indicate that the proposed method can work effectively.