WHICH RESOLUTION FOR RELIABLE ECG P-WAVE ANALYSIS IN ATRIAL FIBRILLATION?

Federica Censi, Giovanni Calcagnini, Michele Triventi, Eugenio Mattei, Pietro Bartolini, Ivan Corazza, Giuseppe Boriani

Abstract

P-wave analysis is becoming more and more used to help indentifying patients at risk for AF. Particularly, precise measurement of P-wave duration is an important factor in determining the risk of atrial arrhythmias. However, the methods to extract P-wave duration must be precise and reliable. Automatic analysis of P-wave must take into account technical aspects, one of those being the bit resolution. The aim of this manuscript is to investigate the effects of amplitude resolution of ECG acquisition systems on P-wave analysis. Starting from ECG recorded by an acquisition system with a LSB of 31 nV (24-bit on an input range of 524mVpp), we reproduced ECG signal as acquired by systems with lower resolution (16, 15, 14, 13 and 12 bit). We found that, when LSB is of the order of 128 µV (12 bit), a single P-wave is not recognizable on ECG (figure 1, upper panel). However, when averaging is applied, a P-wave template can be extracted, apparently suitable for P-wave analysis. Results obtained in terms of P-wave duration revealed that at lowest resolution (from 12 to 14 bit) the error on P-wave duration estimation is important and could lead to misleading results. However, the resolution used nowadays in modern electrocardiographs (15 and 16 bit) lead to results rather similar to those obtained with higher resolution.

References

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Paper Citation


in Harvard Style

Censi F., Calcagnini G., Triventi M., Mattei E., Bartolini P., Corazza I. and Boriani G. (2011). WHICH RESOLUTION FOR RELIABLE ECG P-WAVE ANALYSIS IN ATRIAL FIBRILLATION? . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011) ISBN 978-989-8425-35-5, pages 385-388. DOI: 10.5220/0003091603850388


in Bibtex Style

@conference{biosignals11,
author={Federica Censi and Giovanni Calcagnini and Michele Triventi and Eugenio Mattei and Pietro Bartolini and Ivan Corazza and Giuseppe Boriani},
title={WHICH RESOLUTION FOR RELIABLE ECG P-WAVE ANALYSIS IN ATRIAL FIBRILLATION?},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)},
year={2011},
pages={385-388},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003091603850388},
isbn={978-989-8425-35-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)
TI - WHICH RESOLUTION FOR RELIABLE ECG P-WAVE ANALYSIS IN ATRIAL FIBRILLATION?
SN - 978-989-8425-35-5
AU - Censi F.
AU - Calcagnini G.
AU - Triventi M.
AU - Mattei E.
AU - Bartolini P.
AU - Corazza I.
AU - Boriani G.
PY - 2011
SP - 385
EP - 388
DO - 10.5220/0003091603850388