Characterisation of the relationship between electrogram morphology and wave-front propagation patterns in humans with persistent atrial fibrillation through non-contact mapping.

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Atrial fibrillation can be eliminated by a relatively new treatment called catheter ablation, which involves modification of the electrical properties of the heart using thin wires (catheters) passed up from the leg. Targeting areas where catheters record abnormal electrical activity improves results of catheter ablation, although it is uncertain what these recordings represent. The aim of this study is to characterize these abnormal electrical signals in an attempt to improve ablation outcomes.