0000000000567983
AUTHOR
Riccardo Riccardi
Principal component analysis and cluster analysis for measuring the local organisation of human atrial fibrillation
The distribution of atrial electrogram types has been proposed to characterise human atrial fibrillation. The aim of this study was to provide computer procedures for evaluating the local organisation of intracardiac recordings during AF as an alternative to off-line manual classification. Principal components analysis (PCA) reduced the data set to a few representative activations, and cluster analysis (CA) measured the average dissimilarity between consecutive activations of an intracardiac signal. The data set consisted of 106 bipolar signals recorded on 11 patients during electrophysiological studies for catheter ablation. Performances of PCA and CA in distinguishing between organised (t…
Femicide and murdered women’s children: which future for these children orphans of a living parent?
Background: To assess the prevalence of femicides in Italy over the last three years and the potential long lasting effects of these traumatic events for the children of a woman who dies a violent death. Methods: The data used in this study come from an internet search for the number of femicides occurring in Italy between 1st January, 2012 and 31st October, 2014. Results: The total number of femicides was 319; the average age of murdered women was 47.50∈±∈19.26. Cold arms in the form of sharp object -mostly knives- have caused the death of 102/319 women; firearms were used in 87/319 cases; asphyxiation was the chosen method in 52/319 cases. About the place where the femicides occurred, 209…