Étude de l’équilibre sympatho-vagale par paquets d’ondelettes, Algorithme K-S et modèle autorégressif

Abstract

The cardiovascular signals are, in general, quasi-periodicals with one period which is not strictly constant. These variations are due to the action of the autonomous nervous system (SNA).The first confronted problem is nonthe stationnarity of signal HRV (variability of the rate of heartbeat) because of the state unstable of the behavior sympathetic nerve and parasympathetic. To solve this problem one will study balance sympatho-vagale expressed by the report/ratio of the spectral density in the band of the low frequencies on that of the high frequencies noted LF/HF by applying various methods; packet of ondelettes, K-S Algorithm and autoregression model in order to extract from useful information on the state of the individual in particular his physiological state which can be given in the bands of frequencies LF and HF.