Consistency of complex fractionated atrial electrograms during atrial fibrillation

Digital Signal Processing and Artificial Intelligence Methods for Intracardial Signal Complexity Evaluation

“…We circumvented this problem by averaging the classification by 3 experts to obtain semi-continuous scale of fractionation . Because of temporal variation in appearance of A-EGMs during AF at some sites, it was shown that the signal assessment requires recording duration > 5 seconds to obtain reproducible fractionation measures Lin et al (2008) and Stiles et al (2008). In our study, we used only 1.5 s A-EGMs.…”

Three-Dimensional Electroanatomic Mapping Systems in Catheter Ablation of Atrial Fibrillation

“…The 3D electroanatomic mapping systems also provide an automatic detection algorithm for CFE mapping. Both Lin et al 24 and Stiles etal 25 showed proof of the consistency of the automatic detection algorithms using the electroanatomic mapping systems. The assessment of the CFEs requires a recording duration of ≥5 s at each site in order to obtain a consistent fractionation (Figure 2).…”

Contributing Factors Concerning Inconsistencies in Persistent Atrial Fibrillation Ablation Outcomes

“…Previous work has investigated different segment lengths to consistently characterize CFAEs using NavX, since this system allows for different AEG duration recordings (1 s to 8 s) [7]. CARTO, however inherently limits the AEG collection to 2.5 s, hampering the investigation of CFAE temporal behavior using this system.…”

“…Additionally, while studies support that some CFAEs truly represent local AF drivers, others suggest CFAEs are resultant from distant AF drivers [5,6]. Finally, the spatio-temporal behavior of AEGs in persAF remains contentious [7]. We hypothesized that these factors might contribute to disparities in ablation target identification based on AEG fractionation in persAF.…”