Stanford University
This is a cohort study to evaluate algorithms for mapping atrial fibrillation by mapping atrial structure and mapping electrical activity to detect physiologically important areas. A key innovation of the observation study is to assess tracking of physiological activity in AF, in relation to tissue activity (MAP recordings), and in relation to AF waves of activity. This observational work extends prior studies that focused on focal and rotational activity, dispersion of electrical activity, low voltage activity and others.
In this study, the investigators will compare mapping approaches for atrial fibrillation ablation. First, investigators will compare approaches to map atrial structure from collected computed tomography (CT) scans or magnetic resonance imaging (MRI) scans acquired routinely in patients undergoing ablation for atrial fibrillation. Imaging will be acquired from a variety of clinically approved Second, investigators will compare approaches to analyze electrograms collected routinely at clinical electrophysiology study (EPS) in patients undergoing ablation for atrial fibrillation. Electrograms w…
Inclusion Criteria: * aged 21-80 yrs who underwent electrophysiology study for ablation of Atrial Fibrillation Exclusion Criteria: * Poor data quality of recordings of AF
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