Tracking of Stepwise Ablation of Persistent Atrial Fibrillation using Synchronization of nearby Electrogams
Details
State: Public
Version: author
Serval ID
serval:BIB_0C0EF3B11465
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Institution
Title
Tracking of Stepwise Ablation of Persistent Atrial Fibrillation using Synchronization of nearby Electrogams
Title of the conference
38th Annual Scientific Conference of Computing in Cardiology
Address
Hangzhou, China, September 18-21, 2011
ISBN
0276−6574
ISSN-L
0276−6574
Publication state
Published
Issued date
2011
Volume
38
Series
Computing in Cardiology
Pages
505-508
Language
english
Abstract
Intracardiac organization indices such as atrial fibril-
lation (AF) cycle length (AFCL) have been used to track
the efficiency of stepwise catheter ablation (step-CA) of
long-standing persistent AF (pers-AF), however, with lim-
ited success. The timing between nearby bipolar intracar-
diac electrograms (EGMs) reflects the spatial dynamics of
wavelets during AF. The extent of synchronization between
EGMs is an indirect measure of AF spatial organization.
The synchronization between nearby EGMs during step-
CA of pers-AF was evaluated using new indices based on
the cross-correlation. The first one (spar(W)) quantifies
the sparseness of the cross-correlation of local activation
times. The second one (OI(W)) reflects the local concen-
tration around the largest peak of the cross-correlation. By
computing their relative evolution during step-CA until AF
termination (AF-term), we found that OI(W) appeared su-
perior to AFCL and spar(W) to track the effect of step-CA
"en route" to AF-term.
lation (AF) cycle length (AFCL) have been used to track
the efficiency of stepwise catheter ablation (step-CA) of
long-standing persistent AF (pers-AF), however, with lim-
ited success. The timing between nearby bipolar intracar-
diac electrograms (EGMs) reflects the spatial dynamics of
wavelets during AF. The extent of synchronization between
EGMs is an indirect measure of AF spatial organization.
The synchronization between nearby EGMs during step-
CA of pers-AF was evaluated using new indices based on
the cross-correlation. The first one (spar(W)) quantifies
the sparseness of the cross-correlation of local activation
times. The second one (OI(W)) reflects the local concen-
tration around the largest peak of the cross-correlation. By
computing their relative evolution during step-CA until AF
termination (AF-term), we found that OI(W) appeared su-
perior to AFCL and spar(W) to track the effect of step-CA
"en route" to AF-term.
Create date
18/01/2013 18:16
Last modification date
20/08/2019 13:33
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