Optimization of novel spectral estimator for fractionated electrogram analysis is helpful to discern atrial fibrillation type
A novel spectral estimator is used to discern paroxysmal versus persistent atrial fibrillation fractionated electrograms. The estimator is improved by selectively imparting antisymmetry to basis vectors used to construct the power spectrum. This preprocessing step leads to improved differentiation of spectral parameters in paroxysmal versus persistent atrial fibrillation fractionated electrograms. The improvement is potentially useful to better discern regions of atrial fibrillation substrate that should be targeted for catheter ablation. This method has been shown to provide better discernment of atrial fibrillation type as compared with the Fourier transform estimator.
spectral estimation electrograms atrial fibrillation parameters dominant frequency