Key result
Spatial precision of local activation direction discriminated atrial fibrillation (≤0.85) from regular atrial rhythms (20.91 in 134 of 138 instances).
Why the study?
Does the spatial precision of local activation direction discriminate atrial fibrillation from regular atrial rhythms?
Observational
Does the spatial precision of local activation direction discriminate atrial fibrillation from regular atrial rhythms?
Spatial precision of local activation direction is a useful discriminator of atrial fibrillation from regular atrial rhythms.
Answers are grounded in this paper and cite their sources.
May aid AF discrimination during mapping; leaves open prospective clinical validation.
This study tests the hypothesis that atrial fibrillation (AFib) can be discriminated from regular atrial rhythms by the variation in local activation direction. Human endocardial atrial recordings of AFib, sinus rhythm, atrial flutter, and supraventricular tachycardia were collected, and the direction of each activation was calculated using methods previously described. Each recording was divided into segments containing 100 activations, and the spatial precision for each segment was calculated, The spatial precision for all segments of AFib was /spl les/0.85, whereas the spatial precision for regular rhythms was 20.91 in all but 4 of 138 instances, The results indicate that spatial precision of local activation direction is a useful discriminator of AFib.
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Schoenwald et al. (2002) conducted an observational in Atrial fibrillation. Spatial precision of local activation direction vs. Regular atrial rhythms was evaluated on Discrimination of AFib from regular rhythms. Spatial precision of local activation direction discriminated atrial fibrillation (≤0.85) from regular atrial rhythms (20.91 in 134 of 138 instances).
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