The application of non-linear metrics to physiological signals is a valuable tool because
“hidden information” related to underlying mechanisms can be obtained. In this respect …

Shortening of atrial refractory period during atrial fibrillation has been considered a hallmark
of atrial electrical remodelling. The atrial fibrillatory cycle length, which is intimately related to …

Sample entropy (SampEn) is a nonlinear regularity index that requires the a priori selection
of three parameters: the length of the sequences to be compared, m, the patterns similarity …

Heart rate is quite regular during sinus (normal) rhythm (SR) originating from the sinus node.
In contrast, heart rate is usually irregular during atrial fibrillation (AF). Complete …

A novel method for QRST cancellation during atrial fibrillation (AF) is introduced for use in
recordings with two or more leads. The method is based on an echo state neural network …

Atrial fibrillation (AF) burden is defined as the percentage of time the patient is in AF rhythm
during a certain monitoring period. The accurate AF burden estimation from the long-term …

The problem of classifying short atrial fibrillatory segments in ambulatory ECG recordings as
being either paroxysmal or persistent is addressed by investigating a robust approach to …

Background—Dominant frequencies (DFs) of activation are higher in the atria of patients
with persistent than paroxysmal atrial fibrillation (AF), and left atrial (LA)-to-right atrial (RA) …

Objective. Detecting atrial fibrillation (AF) using electrocardiogram (ECG) recordings from
wearable devices has been challenging due to factors such as low signal-to-noise ratio and …

Background: Several clinical factors have been studied to predict atrial fibrillation (AF)
recurrence after electrical cardioversion (ECV) with limited predictive value. Methods: A …