摘要：Summary. - The presence of organization of atrial activation processes during atrial fibrillation has been
investigated to assess whether the activation sequences are wholly random or are governed by deterministic
mechanisms. We performed a linear analysis based on the cross correlation function and a non linear analysis
based on two algorithms. The first one detects and qualifies recurrent patterns of the coupling between atrial
period time series by means of the recurrence plot quantification approach; the second one estimates the non
linear coupling between activation sequences in two sites following a multivariate embedding approach. The
detection of spatio-temporal recurrent patterns and of non linear coupling together with the surrogate data results
indicate that during atrial fibrillation a certain degree of local organization exists, likely caused by deterministic
mechanisms of activation
关键词：Key words: intracardiac signal analysis, non linear coupling, arrhythmia diagnosis.
