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Spatial characteristics of atrial fibrillation electrocardiograms

Richter, Ulrike LU ; Stridh, Martin LU ; Bollmann, Andreas; Husser, Daniela and Sörnmo, Leif LU (2008) In Journal of Electrocardiology 41(2). p.165-172
Abstract
BACKGROUND: The present study investigates spatial properties of atrial fibrillation (AF) by analyzing vectorcardiogram loops synthesized from 12-lead electrocardiograms (ECGs). METHODS: After atrial signal extraction, spatial properties are characterized through analysis of successive, fixed-length signal segments and expressed in loop orientation, that is, azimuth and elevation, as well as in loop morphology, that is, planarity and planar geometry. It is hypothesized that more organized AF, expressed by a lower AF frequency, is associated with decreased variability in loop morphology. Atrial fibrillation frequency is determined using spectral analysis. RESULTS: Twenty-six patients with chronic AF were analyzed using 60-second ECG... (More)
BACKGROUND: The present study investigates spatial properties of atrial fibrillation (AF) by analyzing vectorcardiogram loops synthesized from 12-lead electrocardiograms (ECGs). METHODS: After atrial signal extraction, spatial properties are characterized through analysis of successive, fixed-length signal segments and expressed in loop orientation, that is, azimuth and elevation, as well as in loop morphology, that is, planarity and planar geometry. It is hypothesized that more organized AF, expressed by a lower AF frequency, is associated with decreased variability in loop morphology. Atrial fibrillation frequency is determined using spectral analysis. RESULTS: Twenty-six patients with chronic AF were analyzed using 60-second ECG recordings. Loop orientation was similar when determined from either entire 60- or 1-second segments. For 1-second segments, the correlation between AF frequency and the parameters planarity and planar geometry were 0.608 (P < .001) and 0.543 (P < .005), respectively. CONCLUSIONS: Quantification of AF organization based on AF frequency and spatial characteristics from the ECG is possible. The results suggested a relatively weak coupling between loop morphology and AF frequency when determined from the surface ECG. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Electrocardiology
volume
41
issue
2
pages
165 - 172
publisher
Elsevier
external identifiers
  • PMID:18328340
  • WOS:000254095500020
  • Scopus:39849086663
ISSN
1532-8430
DOI
10.1016/j.jelectrocard.2007.10.006
language
English
LU publication?
yes
id
2fa74083-b2ad-4dbe-bacb-6b6c813a9af1 (old id 601685)
date added to LUP
2007-12-12 11:09:38
date last changed
2016-10-13 04:47:46
@misc{2fa74083-b2ad-4dbe-bacb-6b6c813a9af1,
  abstract     = {BACKGROUND: The present study investigates spatial properties of atrial fibrillation (AF) by analyzing vectorcardiogram loops synthesized from 12-lead electrocardiograms (ECGs). METHODS: After atrial signal extraction, spatial properties are characterized through analysis of successive, fixed-length signal segments and expressed in loop orientation, that is, azimuth and elevation, as well as in loop morphology, that is, planarity and planar geometry. It is hypothesized that more organized AF, expressed by a lower AF frequency, is associated with decreased variability in loop morphology. Atrial fibrillation frequency is determined using spectral analysis. RESULTS: Twenty-six patients with chronic AF were analyzed using 60-second ECG recordings. Loop orientation was similar when determined from either entire 60- or 1-second segments. For 1-second segments, the correlation between AF frequency and the parameters planarity and planar geometry were 0.608 (P &lt; .001) and 0.543 (P &lt; .005), respectively. CONCLUSIONS: Quantification of AF organization based on AF frequency and spatial characteristics from the ECG is possible. The results suggested a relatively weak coupling between loop morphology and AF frequency when determined from the surface ECG.},
  author       = {Richter, Ulrike and Stridh, Martin and Bollmann, Andreas and Husser, Daniela and Sörnmo, Leif},
  issn         = {1532-8430},
  language     = {eng},
  number       = {2},
  pages        = {165--172},
  publisher    = {ARRAY(0xa558078)},
  series       = {Journal of Electrocardiology},
  title        = {Spatial characteristics of atrial fibrillation electrocardiograms},
  url          = {http://dx.doi.org/10.1016/j.jelectrocard.2007.10.006},
  volume       = {41},
  year         = {2008},
}