Dominant Frequency, Regularity and Organization Indexes Response to Preprocessing Filter Variations on Simulated Electrograms During Atrial Fibrillation

Andrés Orozco-Duque, Juan P. Ugarte, Catalina Tobón, Carlos A. Morillo, Javier Saiz, John Bustamante

Abstract

Atrial fibrillation (AF) is the most common tachyarrhythmia. An accurate AF diagnosis is based on electrograms (EGM) interpretation. In this work, we evaluated different preprocessing filters to calculate dominant frequency (DF), organization index (OI) and regularity index (RI) for EGMduring AF, this comparative analysis has not been reported previously. EGMwere obtained from AF simulated by a three-dimensional model of human atria. The preprocessing stage with a low-pass filter, rectification and high pass filter was implemented. Additionally, a test over 60 simulated signals using different filters with different orders was developed. It was found that some filters affect the DF calculation and cause a bimodal distribution in the DF histogram. Calculation of DF, OI and RI by Fast Fourier Transform analysis of preprocessing signals has high sensibility to filters settings. OI and RI analysis works properly in EGMwith single potentials, however, DF is not necessary related with cycle length in fragmented EGM and OI calculation becomes inaccurate with high DF.

References

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Paper Citation


in Harvard Style

Orozco-Duque A., P. Ugarte J., Tobón C., A. Morillo C., Saiz J. and Bustamante J. (2013). Dominant Frequency, Regularity and Organization Indexes Response to Preprocessing Filter Variations on Simulated Electrograms During Atrial Fibrillation . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2013) ISBN 978-989-8565-36-5, pages 306-309. DOI: 10.5220/0004231903060309


in Bibtex Style

@conference{biosignals13,
author={Andrés Orozco-Duque and Juan P. Ugarte and Catalina Tobón and Carlos A. Morillo and Javier Saiz and John Bustamante},
title={Dominant Frequency, Regularity and Organization Indexes Response to Preprocessing Filter Variations on Simulated Electrograms During Atrial Fibrillation},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2013)},
year={2013},
pages={306-309},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004231903060309},
isbn={978-989-8565-36-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2013)
TI - Dominant Frequency, Regularity and Organization Indexes Response to Preprocessing Filter Variations on Simulated Electrograms During Atrial Fibrillation
SN - 978-989-8565-36-5
AU - Orozco-Duque A.
AU - P. Ugarte J.
AU - Tobón C.
AU - A. Morillo C.
AU - Saiz J.
AU - Bustamante J.
PY - 2013
SP - 306
EP - 309
DO - 10.5220/0004231903060309