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- W2741114754 abstract "The objective of this study was to evaluate the spatiotemporal organization and progression of human ventricular fibrillation (VF) in the left ventricle (LV) and the right ventricle (RV). Studies suggest that localized sources contribute to VF maintenance, but the evolution of VF episodes has not been quantified. Synchrony between electrograms recorded from 25 patients with induced VF is computed and used to define the Asynchronous Index (ASI), indicating regions which are out of step with surrounding tissue. Computer simulations show that ASI can identify the location of VF-maintaining sources, where greater values of the maximum ASI (ASImax) correlate with more stable sources. Automated synchrony analysis shows elevated values of ASI in a majority of self-terminating episodes (LV: 8/9; RV: 7/8) and sustained episodes (LV: 11/11; RV: 12/12). The locations of ASImax in sustained episodes colocalize with rotor cores when rotational activity is simultaneously present in phase maps (LV: 8/8; RV: 5/7; p < 0.05). The distribution of the ASImax differentiates self-terminating from sustained episodes (mean ASImax = 0.60 ± 0.14 and 0.70 ± 0.16, respectively; p = 0.01). For sustained episodes, the LV exhibits an increase in ASImax with time. Quantitative analysis identifies localized asynchronous regions that correlate with sources in VF, with sustained episodes evolving to exhibit more stable activation in the LV. This successive increase in stability indicates a stabilizing agent may be responsible for perpetuating fibrillation in a “migrate-and-capture” mechanism in the LV." @default.
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- W2741114754 date "2017-12-01" @default.
- W2741114754 modified "2023-10-18" @default.
- W2741114754 title "Spatiotemporal Progression of Early Human Ventricular Fibrillation" @default.
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- W2741114754 doi "https://doi.org/10.1016/j.jacep.2017.04.009" @default.
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