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. 2015 Aug;4(2):109-15.
doi: 10.15420/aer.2015.04.02.109.

Is Mapping of Complex Fractionated Electrograms Obsolete?

Manav Sohal  1 , Rajin Choudhury  1 , Philippe Taghji  1 , Ruan Louw  1 , Michael Wolf  1 , Joel Fedida  1 , Yves Vandekerckhove  1 , Rene Tavernier  1 , Mattias Duytschaever  1 , Sébastien Knecht  1
Affiliations

Is Mapping of Complex Fractionated Electrograms Obsolete?

Manav Sohal et al. Arrhythm Electrophysiol Rev. 2015 Aug.

Abstract

Atrial fibrillation is the most common clinically encountered arrhythmia and catheter ablation has emerged as a viable treatment option in drug-refractory cases. Pulmonary vein isolation is widely regarded as the cornerstone for successful outcomes in paroxysmal AF given that the pulmonary veins are a frequent source of AF triggering. Ablation strategies for persistent AF are less well defined. Mapping and ablation of complex fractionated electrograms (CFAEs) is one strategy that has been proposed as a means of modifying the atrial substrate thought to be critical to the perpetuation of AF. Results of clinical studies have proved conflicting and there are now strong data to suggest that pulmonary vein isolation alone is associated with outcomes comparable to those of pulmonary vein isolation plus CFAE ablation. Several studies have demonstrated that the majority of CFAEs are passive phenomena and therefore not critical to the perpetuation of AF. Conventional mapping technologies (using a bipolar or circular mapping catheter) lack the spatiotemporal resolution to identify mechanisms of AF persistence. The development of wide-field mapping techniques allows simultaneous acquisition of activation data over large areas. This strategy has the potential to better identify regions critical to AF perpetuation, and preliminary data suggest that ablation outcomes are improved when guided by these techniques. While mapping and ablation of all CFAEs is almost certainly obsolete, better identification of regions responsible for AF persistence has the potential to improve outcomes in ablation of persistent AF.

Keywords: Atrial fibrillation; ECG imaging; complex fractionated electrogram; phase mapping.

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Figures

Figure 1:
Figure 1:. Examples of Frequently Encountered CFAE
Figure 2:
Figure 2:. Intracardiac Electrograms and CFAE Map in a Patient with Persistent AF
Figure 3:
Figure 3:. Phase Mapping Using ECG Imaging
Figure 4:
Figure 4:. Correlation of Phase Map Data with Conventional Activation Time Mapping
See this image and copyright information in PMC

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