Med Biol Eng Comput - Atrial activity estimation from atrial fibrillation ECGs by blind source extraction based on a conditional maximum likelihood approach.

Tópicos

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Resumo

This work presents a spatial filtering method for the estimation of atrial fibrillation activity in the cutaneous electrocardiogram. A linear extraction filter is obtained by maximising the extractor output power on the significant spectral support of the signal of interest. An iterative procedure based on a quasi-maximum likelihood estimator is proposed to jointly estimate the significant spectral support and the extraction filter. Compared with a previously proposed spatio-temporal blind source separation method, our approach yields an improved atrial activity signal estimate as quantified by a higher spectral concentration of the extractor output. The proposed methodology can readily be adapted to signal extraction problems in other application domains.

Resumo Limpo

work present spatial filter method estim atrial fibril activ cutan electrocardiogram linear extract filter obtain maximis extractor output power signific spectral support signal interest iter procedur base quasimaximum likelihood estim propos joint estim signific spectral support extract filter compar previous propos spatiotempor blind sourc separ method approach yield improv atrial activ signal estim quantifi higher spectral concentr extractor output propos methodolog can readili adapt signal extract problem applic domain

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