Abstract
To the Editor: We have read with interest the article by Elvan et al,1 who studied the agreement between the dominant frequency (DF) of atrial fibrillation (AF) and local atrial fibrillation cycle length (AFCL). They suggested that high-frequency sites, being a potential target for ablation, should be localized using AFCL as estimated from endocardial electrograms and not by selecting the largest spectral peak as DF. The authors refer to the study by Ng et al,2 which demonstrated that signal amplitude and AFCL variability affect …
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