Semi-supervised clustering of fractionated electrograms for electroanatomical atrial mapping
نویسندگان
چکیده
منابع مشابه
Semi-supervised clustering of fractionated electrograms for electroanatomical atrial mapping.
BACKGROUND Electrogram-guided ablation procedures have been proposed as an alternative strategy consisting of either mapping and ablating focal sources or targeting complex fractionated electrograms in atrial fibrillation (AF). However, the incomplete understanding of the mechanism of AF makes difficult the decision of detecting the target sites. To date, feature extraction from electrograms is...
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BACKGROUND Complex fractionated atrial electrograms (CFAE) acquired during atrial fibrillation (AF) are commonly assessed using the discrete Fourier transform (DFT), but this can lead to inaccuracy. In this study, spectral estimators derived by averaging the autocorrelation function at lags were compared to the DFT. METHOD Bipolar CFAE of at least 16 s duration were obtained from pulmonary ve...
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BACKGROUND The dominant frequency of the Fourier power spectrum is useful to analyze complex fractionated atrial electrograms (CFAE), but spectral resolution is limited and uniform from DC to the Nyquist frequency. Herein the spectral resolution of a recently described and relatively new spectral estimation technique is compared to the Fourier radix-2 implementation. METHODS In 10 paroxysmal ...
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Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. There are two main factors facilitating the formation and persistence of AF: enhanced automaticity in some rapidly depolarizing foci and abnormal conduction substrates [1]. Fractionated or fragmented electrograms during AF were initially reported by Konings et al. [2] Then, other authors d...
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Since its inception in the 1990s, catheter ablation of atrial fibrillation (AF) has been a continuously evolving procedure. Ablation strategies have adapted to advances in technology including new catheter designs, innovations in mapping systems, and alternative energy sources. Moreover, catheter ablation has stimulated and responded to an improved understanding of the mechanisms of initiation ...
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ژورنال
عنوان ژورنال: BioMedical Engineering OnLine
سال: 2016
ISSN: 1475-925X
DOI: 10.1186/s12938-016-0154-5