Comput Math Methods Med - Detection of structural changes in tachogram series for the diagnosis of atrial fibrillation events.

Tópicos

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Resumo

Atrial Fibrillation (AF) is the most common cardiac arrhythmia. It naturally tends to become a chronic condition, and chronic Atrial Fibrillation leads to an increase in the risk of death. The study of the electrocardiographic signal, and in particular of the tachogram series, is a usual and effective way to investigate the presence of Atrial Fibrillation and to detect when a single event starts and ends. This work presents a new statistical method to deal with the identification of Atrial Fibrillation events, based on the order identification of the ARIMA models used for describing the RR time series that characterize the different phases of AF (pre-, during, and post-AF). A simulation study is carried out in order to assess the performance of the proposed method. Moreover, an application to real data concerning patients affected by Atrial Fibrillation is presented and discussed. Since the proposed method looks at structural changes of ARIMA models fitted on the RR time series for the AF event with respect to the pre- and post-AF phases, it is able to identify starting and ending points of an AF event even when AF follows or comes before irregular heartbeat time slots.

Resumo Limpo

atrial fibril af common cardiac arrhythmia natur tend becom chronic condit chronic atrial fibril lead increas risk death studi electrocardiograph signal particular tachogram seri usual effect way investig presenc atrial fibril detect singl event start end work present new statist method deal identif atrial fibril event base order identif arima model use describ rr time seri character differ phase af pre postaf simul studi carri order assess perform propos method moreov applic real data concern patient affect atrial fibril present discuss sinc propos method look structur chang arima model fit rr time seri af event respect pre postaf phase abl identifi start end point af event even af follow come irregular heartbeat time slot

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