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Europace Advance Access originally published online on December 18, 2008
Europace 2009 11(3):324-327; doi:10.1093/europace/eun331
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Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2008. For permissions please email: journals.permissions@oxfordjournals.org

Electrophysiology-Spectral Analysis of Arrhythmias

Spatial and temporal organization of the dominant frequencies in the fibrillating heart: body surface potential mapping in a rare case of sustained human ventricular fibrillation

P. Langley1,*, G.A. MacGowan2 and A. Murray1

1 Cardiovascular Physics and Engineering Group, Medical Physics Department, Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK; 2 Academic Cardiology Department, Newcastle University and Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK

Aims: The aim of this study was to assess the spatial and temporal variability of dominant fibrillation frequencies in a rare case of sustained human ventricular fibrillation (VF).

Methods and results: Body surface potential mapping was performed in a patient with sustained VF and who was supported by a biventricular assist device. Dominant frequencies at 54 body sites were calculated from two recordings obtained 38 days apart. Variability of dominant frequencies between recordings and across body sites was quantified. Median dominant frequencies within recordings varied between 6.1 and 7.2 Hz in recording 1 and 5.6 and 6.6 Hz in recording 2, indicating a significant reduction in dominant frequencies between the recordings (P < 0.0001). Dominant frequencies differed across body sites by a mean (range) of 1.7 (0.4–2.8) Hz.

Conclusion: In this rare case of sustained VF, there was significant spatial and temporal variability of VF dominant frequencies. These findings should be considered in future ECG studies on VF where the spatial variability of dominant frequency might not otherwise have been considered.

Key Words: Ventricular fibrillation, Body surface potentials, Spectral analysis, Dominant frequency

* Corresponding author. Tel: +44 191 2231664 ext. 26668, Fax: +44 191 2130290, Email: philip.langley{at}ncl.ac.uk

Manuscript submitted 3 June 2008. Accepted after revision 11 November 2008.


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