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Comparison of body surface and intracardiac ECG recordings in patients with atrial fibrillation during electrophysiological studies

Lookup NU author(s): Marjan Bojarnejad, Dr James Blake, Dr John Bourke, Emeritus Professor Alan MurrayORCiD, Dr Philip Langley


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Atrial fibrillation (AF) dominant frequency (DF) is thought to reflect the degree of organisation of underlying atrial activity (AA). Our aim was to evaluate the relationship between the DFs from the body surface electrocardiogram (ECG) and intracardiac electrogram (EGM). Surface recordings of the ECG with 64 electrodes were obtained from 12 patients during AF ablation procedures. After subtracting ventricular activity (QRST), DF was obtained from spectral analysis of the channel exhibiting the largest AF component. Intracardiac recordings from the coronary sinus (CS) were obtained simultaneously, the DF was extracted from the channel closest to the left atrium. 24 recordings of 2 minute duration were analysed. Mean (SD) DF of the body surface ECG recording was 6.09 (0.87) Hz, and for intracardiac recording was 5.78 (0.84). Although in individual subjects there were differences in DF between the surface and intracardiac recordings up to 1.6 Hz, overall the difference was only 0.31 (0.64) Hz and was not significant. © 2013 Springer-Verlag.

Publication metadata

Author(s): Bojarnejad M, Blake J, Bourke JP, Murray A, Langley P

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: World Congress on Medical Physics and Biomedical Engineering

Year of Conference: 2012

Pages: 612-615

Online publication date: 26/05/2012

Publisher: Springer


DOI: 10.1007/978-3-642-29305-4_160

Library holdings: Search Newcastle University Library for this item

Series Title: IFMBE Proceedings

ISBN: 9783642293047