Section: Software

LARY_CR: Software package for the Analysis of Cardio Vascular and Respiratory Rhythms

Participants : Claire Médigue, Serge Steer.

LARY_CR is a software package dedicated to the study of cardiovascular and respiratory rhythms [97] . It presents signal processing methods, from events detection on raw signals to the variability analysis of the resulting time series. The events detection concerns the heart beat recognition on the electrocardiogram, defining the RR time series, the maxima and minima on the arterial blood pressure defining the systolic and diastolic time series. These detections are followed by the resampling of the time series then their analyse. This analyse uses temporal and time frequency methods: Fourier Transform, spectral gain between the cardiac and blood pressure series, Smooth Pseudo Wigner_Ville Distribution, Complex DeModulation, temporal method of the cardiovascular Sequences. The objective of this software is to provide some tools for studying the autonomic nervous system, acting in particular in the baroreflex loop; its functionning is reflected by the cardiovascular variabilities and their relationships with the other physiological signals, especially the respiratory activity. Today LARY_CR is used internally, in the framework of our clinical collaborations, and the functions devoted to the rhythms analysis are now freely available through the Scilab Cardiovascular toolbox, as an atom module.